104 results about "Resistor" patented technology

Systems and methods are disclosed for detecting balanced electrical leakage between a power source and a machine frame. In one embodiment, a balanced fault detection system for a machine includes a power source that is electrically insulated from a machine frame and a leakage detection switch that is connected to a ground. The balanced fault detection system also includes a leakage detection resistor that is interposed between a power source terminal and the switch having a leakage detection resistance. The balanced fault detection system further includes a voltage measuring device that measures voltages of the power source at positive and negative voltage sides of the ground and a leakage calculator that calculates a leakage resistance of the machine based on the measured voltages at the positive and negative voltage sides and the leakage detection resistance.

A cross point memory array includes a structure in which holes are formed in an insulating layer and a storage node is formed in each of the holes. The storage node may include a memory resistor and a switching structure. The master for an imprint process used to form the cross-point memory array includes various pattern shapes, and the method of manufacturing the master uses various etching methods.

A voltage generation circuit may include a static current circuit and/or a current mirror. The static current circuit may include a first resistor. The current mirror may include a second resistor, a third resistor, and/or an output terminal.

The invention discloses a chopper-type direct current detection method and a circuit. A forward voltage and a backward voltage of two ends of a shunt resistor are continuously collected in real time through a certain frequency. A sampling value of a first half of a chopper period and a sampling value of a second half of the chopper period in a same chopper period are calculated and influences of a low-frequency noise, an offset voltage and other noises on a detection result are eliminated. The detection circuit comprises a shunt resistor, a simulation switch, an amplifier, an analog-to-digital converter and a control unit. The simulation switch is connected in parallel to two ends of the shunt resistor. An input terminal of the amplifier is connected to an output terminal of the simulation switch. An input terminal of the analog-to-digital converter is connected to an output terminal of the amplifier. An input terminal of the control unit is connected to an output terminal of the analog-to-digital converter. An output terminal of the control unit is connected to a control signal input terminal of the simulation switch. On one hand, the control unit provides a digital signal to control switching of the simulation switch; on the other hand, according to digital forward and backward voltage signal, the control unit acquires a direct current detection value. A circuit structure provided in the invention is simple; test accuracy is high and cost is low.

The invention relates to the technical field of integrated circuits, in particular to a current mirror. The current mirror is characterized in that the current mirror is composed of a PMOS transistor MP1, a PMOS transistor MP2, an NMOS transistor MN1, a capacitor C1, a capacitor C2, a resistor R1, an input current source, an output end current source and a bias current source. The source electrode of the MP1 is connected with a power source VCC, the grid electrode of the MP1 is connected with the grid electrode of the MP2, and the drain electrode of the MP1 is connected with positive electrode of the input current source. The negative electrode of the input electrode source is grounded VSS. The drain electrode of the MN1 is connected with the power source VCC, the grid electrode of the MN1 is connected with the positive electrode of the input current source, the source electrode of the MN1 is connected with the positive electrode of the bias current source, and the substrate of the MN1 is connected with a connection point of the grid electrode of the MP1 and the grid electrode of the MP2 through the R1. A connection point of the source electrode of the MP1 and the drain electrode of the MN1 is connected with a connection point of the grid electrode of MN1 and the positive electrode of the input current source through the C1 and the C2 sequentially. The source electrode of the MP2 is connected with the power source VCC, and the drain electrode of the MP2 is connected with the positive electrode of an output current source. The current mirror has the advantages of being suitable for being used under low supply voltage, meanwhile improving the PSR of the current mirror, and being especially suitable for a current mirror circuit.

The invention discloses a current generating circuit with an adjustable temperature coefficient. The current generating circuit comprises a current mirror, an operational amplifier, a switching tube,at least two positive temperature coefficient resistors, at least two negative temperature coefficient resistors, a positive temperature coefficient switch and a negative temperature coefficient switch. Thus, on the basis of a voltage-to-current circuit in the prior art, output current is appropriately matched, the current generating circuit achieves the adjustable temperature coefficient, resistance matching is different from traditional pure serial connection or pure parallel connection, and circuit space is saved; the accuracy of the temperature coefficient is high.

The invention relates to a high-speed serial port load automatic calibration circuit. One end of a port load resistor array of the high-speed serial port load automatic calibration circuit is connected with an analog power supply, the other end is connected with an input end of a first current source, and an output end of the first current source is connected to the ground; one end of a high-precision resistor is connected with an analog power supply, the other end is connected with an input end of a second current source, and an output end of the second current source is connected to the ground; one end of a high-speed serial port resistor array is connected with an analog power supply; a negative input end of a comparator is connected between the port load resistor array and the first current source, a positive input end is connected between the high-precision resistor and the second current source, the comparator compares voltage values of the high-precision resistor and the port load resistor array and outputs a comparison result signal to a digital state machine, the digital state machine generates a control signal to control resistance of the port load resistor array and the high-speed serial port resistor array. The high-speed serial port load automatic calibration circuit provided by the invention realizes automatic calibration of the high-speed serial port load resistor, and achieves an impedance matching effect of a high-speed serial port.

Certain aspects of a method and system for a process sensor to compensate SoC parameters in the presence of IC process manufacturing variations are disclosed. Aspects of one method may include determining an amount of process variation associated with at least one transistor within a single integrated circuit. The determined amount of process variation may be compensated by utilizing a process dependent current, a bandgap current, and a current associated with a present temperature of the transistor. The process dependent current, the bandgap current and the current associated with the present temperature of the transistor may be combined to generate an output current. A voltage generated across a variable resistor may be determined based on the generated output current.

The invention discloses a microelectronic temperature sensor and a preparation method thereof. Specifically, the sensor is a graphene oxide capacitive temperature sensor based on a post-COMS MEMS micro-processing technology. A graphene oxide material is a new type nano-material which has a high dielectric constant, and a dielectric constant value can be changed rapidly along with the change of a temperature. Compared with the temperature sensors such as a common Pt resistor and a PN junction, the microelectronic temperature sensor has the advantages that because a current does not pass through a device, the influence of self-heating effect on a measurement process is avoided when the measurement is carried out, the measurement error is low, the heat loss is low and the dynamic response time is short. Because the dielectric constant of the graphene oxide can be increased rapidly along with the rise of the temperature at the low temperature, a method for detecting a required high-sensitivity temperature sensor at the low temperature is realized. Through combination of the post-COMS MEMS micro-processing technology, the temperature sensor is small in size, low in cost and short in response time.

A circuit for attenuating a surge is disclosed that might include a conductor for receiving the surge, a capacitor, positioned along the conductor, for blocking the surge, and a gas tube having a first end coupled to the conductor and a second end coupled to a ground. The circuit might also include a transformer having a first wire and a second wire, the transformer being coupled to the conductor, a resistor coupled to the first and second wires of the transformer, a varistor coupled to the first wire of the transformer, and a diode coupled to the second wire of the transformer.

The invention discloses a long-line repair method of a COA array substrate, and belongs to the technical field of displaying. The long-line repair method of the COA array substrate solves the technical problem that in the prior art, long-line metal is prone to disengaging. The long-line repair method comprises the steps that first via holes are formed in the two ends of a first long-line area, and a metal wire to be repaired are exposed out; transparent electrodes and colored resistors of the first long-line area are removed to form a first groove; first long-line metal is formed in the first groove to enable the two ends of the first long-line metal to be connected with the metal wire to be repaired through the first via holes. The long-line repair method can be applied in the manufacturing process of the COA array substrate.

The invention relates to the technology of a power source and an integrated circuit, in particular to a DC-DC converter with the output voltages capable of being adjusted quickly. The DC-DC converter comprises a driving circuit, a PMOS tube MP, an NMOS tube MN, a PWM comparator, an EA amplifier, an inductor L, a capacitor C, a resistor R and a power source Vin. The DC-DC converter is characterized in that a calculating amplifier is further included, the driving circuit, the PMOS tube MP, the NMOS tube MN, the PWM comparator, the EA amplifier, the inductor L, the capacitor C, the resistor R and the power source Vin form a traditional DC-DC converter, and the positive input end and the output end of the calculating amplifier are connected to be used as one end, connected to the capacitor C, of a bumper. The DC-DC converter has the advantages of being simple in structure, easy to achieve, low in power consumption, and capable of achieving quick adjusting of the output voltages of the DC-DC converter only by small domain area. The DC-DC converter is particularly suitable for DC-DC converters.

Provided is a clock generator employed in a continuous-time sigma-delta modulator. The clock generator includes an oscillator configured to generate pulses in response to an enable signal, a counter configured to count the number of pulses generated by the oscillator and output the total pulse count, and an output circuit configured to output an inactivated output signal if the pulse count of the counter is equal to a pulse-width control bit. The oscillator includes an astable multi-vibrator. Since the astable multi-vibrator capable of generating a low-jitter pulse from a jittered clock is used as the oscillator, a signal-to-noise ratio is improved. A simple configuration using only digital circuits makes it easier to design a circuit and adjust pulse width. Moreover, according to the structure of the astable multi-vibrator, it is possible to design a circuit to optimally modulate pulse width in connection with process variations of resistors and capacitors used in the continuous-time sigma-delta modulator.

A sacrificial anode assembly operative to inhibit corrosion in the metal tank portion of a water heater includes a cylindrical metal anode member having an end retained within a tubular, electrically non-conductive plastic insulating sleeve which, in turn, is captives retained within a metal cap portion of the assembly. A resistor is received in an end surface groove of the sleeve and has a lead wire spot-welded or soldered to a core wire portion of the anode member. To prevent contact between the lead wire and the metal cap, and to protect the lead wire against vibration caused breakage at its spot weld or solder area, a U-shaped central portion of the lead wire is received in a through-opening in the resistor-supporting end of the sleeve which is covered by an annular insulating wafer formed from an electrically non-conductive material.

The invention discloses a novel transformer station secondary cable alignment device. The device comprises a detected end and a detection end which are respectively arranged at two ends of a to-be-detected secondary cable, and a voltage measurement device used for measuring a voltage of the two ends of the secondary cable, wherein the detected end is provided with a power source, a switch K1, N wiring ends and N+1 wiring resistors connected in series between the power source and the switch, and the N wiring ends are respectively connected with wiring nodes of any two adjacent wiring resistors. The device is advantaged in that through setting alignment terminals, the wiring resistors are arranged among the alignment terminals, all the wiring resistors are connected in series with a certain voltage, a voltage of any two points of each wiring terminal can be determined, so a voltage difference table can be made, through voltage measurement of the other end of the to-be-detected secondary cable, determination of corresponding labels can be carried out through a table query method, cable alignment can be accomplished, the device is integrally convenient and rapid, and low cost and high precision are realized.

The invention provides a common mode moving circuit for a multipoint low voltage differential signal receiver. The common mode moving circuit comprises a first resistor, a second resistor and a current regulating circuit as well as an error amplifier, wherein the current regulating circuit is formed by a third and fourth resistors and first to sixth transistors; grids of the second and fifth transistors are in a short connection with a drain electrode; grids of the first, second and third transistors are connected with each other and the source ends are grounded; grids of the fourth, fifth and sixth transistors are connected and the source ends are connected with power supply voltage; drain ends of the first and fourth transistors are connected with the first resistance; the third and fourth resistance is in a serial connection between a drain end of the second transistor and a drain end of the fifth transistor; drain ends of the third and sixth transistors are connected with the second resistor; a difference-mode input end of the error amplifier is connected with a reference level; and a common mode input end is connected with the drain ends of the first and third transistors. No effects are caused to input signal differential value; and the common mode moving circuit has system noise ratio higher than a receiver using a compression network.

The invention discloses a manufacturing method of a surface mounted device (SMD) resistor. The method for manufacturing a positive electrode of the SMD resistor comprises the following steps: firstly, printing a resistive layer; secondly, printing and covering a positive auxiliary electrode at both sides of a position in which the resistive layer is close to the positive electrode; and thirdly, sputtering to form the positive electrode, thus ensuring the connectivity between the positive electrode and the resistive layer and strengthening the stability of a product. The positive electrode is used for sputtering a conductive material which takes silver as a main composition in a vacuum sputtering mode. The sputtered conductive material can be sputtered uniformly to a substrate surface. A sputtered electrode layer has the advantages of thin film and excellent uniformity, thus ensuring the uniformity of the film thickness of the positive electrode and overcoming the shortcoming that the initial value of the resistor is easy-dispersed. Besides, the cost of the conductive material taking the silver as the main component is lower than that of silver paste, and the amount of the conductive materials is less, thus effectively reducing the production cost of products, improving the market competitiveness of the products and being suitable for batch production.

The invention discloses a method for detecting an inner connecting resistor of a power battery pack. The method includes the following steps that (1) the alternating current inner resistance Zi of each battery cell is tested before battery modules are assembled; (2) the alternating current inner resistance Zm of each battery module is tested after the battery modules are assembled and before the battery pack is assembled, and the inner connecting resistor comprehensive value Rci of each battery module is calculated through the Zi and the Zm; (3) constant-current discharge is conducted on the power battery pack, the direct current resistance Di of each battery module and the direct current resistance Dp of the battery pack are calculated, and the connecting resistor comprehensive value Rco between the modules is calculated through the Di and the Dp; (4) the inner connecting resistor comprehensive value Rc of the battery pack is calculated through the formula Rc=Rci+Rco; (5) the inner connecting resistor of the power battery pack is evaluated through the Rc. According to the method for detecting the inner connecting resistor of the power battery pack, the structure of the battery pack does not need to be damaged, the Rc can be calculated effectively and conveniently, and therefore support is provided for the connecting resistor design of the battery pack and the electrical property and health condition judgment.

A sensor device is provided with a voltage detection type sensor unit for converting a physical quantity into a voltage value and outputting a voltage signal indicating the voltage value; a chopper amplifier unit for generating a modulation signal by chopping the voltage signal output from the sensor unit with a predetermined chopping frequency, amplifying the modulation signal into an amplification signal, then demodulating the amplification signal and outputting it as an output signal; an integration unit including an operational amplifier, an input resistor connected to the inverting input terminal of the operational amplifier and a capacitor connected between the inverting input terminal and an output terminal of the operational amplifier; and a digital conversion unit for converting the output signal integrated by the integration unit into a digital signal.

The invention discloses a measurement circuit and method for an insulation monitoring instrument fault circuit. The measurement method comprises the steps that firstly, a low-frequency square-wave pulse signal with the positive electrode and the negative electrode symmetrical is generated inside an insulation monitoring instrument; secondly, a measurement loop is formed through high negative voltage, a full ground plane and an insulation resistor Rf-dc; thirdly, a sample voltage is generated on a sampling resistor Rm through current in the measurement loop; fourthly, the sample voltage is sent to a built-in microprocessor for acquisition, and the numerical value of the insulation resistor Rf-dc can be obtained by conducting calculation according to the redundant binary algorithm. The measurement circuit and method for the insulation monitoring instrument fault circuit have the advantages the measurement precision is high, reliability is high, safety is high, and the circuit and method are suitable for different environments.

A transponder and a method for wireless data transmission is provided. The transponder comprises an input circuit with input terminals for connecting an antenna coil for data transmission to a base station by means of inductive coupling, a first controllable switching means, at least one resistor, which is looped in series with the first controllable switching means between the input terminals of the input circuit, and a controller which is designed in such a way that it connects through the first switching means as soon as a voltage applied at the input terminals falls below a first settable threshold value, and again interrupts it as soon as the voltage applied at the input terminals for a settable duration is above the first settable threshold value and/or above a second settable threshold value.

The invention provides an electronic thermometer capable of conducting measuring at an ear lobe portion fast. The electronic thermometer comprises a power supply, a temperature collecting module, an analog-to-digital conversion chip, a microcontroller and a liquid crystal display (LCD), wherein the temperature collecting module, the analog-to-digital conversion chip, the microcontroller and the LCD display are sequentially connected. The power supply is respectively connected with the temperature collecting module, the analog-to-digital conversion chip and the microcontroller. The temperature collecting module comprises a metal temperature sensing plate and a negative temperature coefficient (NTC) thermal sensitive resistor unpackaged bare chip. The NTC thermal sensitive resistor unpackaged bare chip is connected onto the metal temperature sensing plate in fastening mode. The electronic thermometer has the advantage of being simple in structure, short in measuring time and low in cost.