54results about "Electric signal transmission systems" patented technology

A method and apparatus for wireless communication on an existing wireless communication network comprising taking existing data and manipulating the data to create manipulated data. The manipulated data is then translated into an application specific message. The application specific message is applied to control and communicate with an application specific apparatus, whereby wireless communication on the existing wireless communication network is provided without causing any disruption, system overloading, or limitation on normal system communication activity.

A remote control uses IR (infrared) commands to control various consumer appliances made by various manufactures. The remote control is low-cost, consumer-friendly, programmable, has its own graphical display so it does not interfere with a TV or other viewing screen, and is capable of interacting with the internet or other data source to provide a rich set of functionality.

Enhanced accuracy finger position and motion sensors devices, algorithms, and methods are disclosed that can be used in a variety of different applications. The sensors can be used in conjunction with partial fingerprint imagers to produce improved fingerprint scanners. Such improved scanners can use image analysis techniques, such as interpolation between partial fingerprint images to correct for missing data, or discarding redundant partial fingerprint image data, to produce adequate fingerprint images even when the finger has not been applied to the sensor using an optimum technique.

A circuit for converting an analog signal to a discrete pulse-width-modulated (PWM) signal uses a delta-sigma amplifier and a discrete PWM stage to produce a discrete PWM output signal having lower in-band signal noise then a PDM system and a lower signal distortion then a continuous PWM system. A multiple bit quantization stage drives the discrete PWM stage.

A cargo theft prevention method is disclosed. According to the method, a security device for sealing a cargo container and a communication system capable of being in communication with a sealer and an unsealer are provided. A first code utilizing a first algorithm stored in the communication system is generated. A second code utilizing a second algorithm stored in the security device is generated. The second code is then examined when the security device is to be unsealed.

In a remote control system having a transmitter and a receiver, a rolling code is ciphered to generate a ciphered rolling code by repeating, n times, an exclusive-OR operation on a constant code in a rolling code table and the rolling code as well as an-maximum shift keying. A key code specific to each control system is used as a constant code at the k-th exclusive-OR logic operation so that the k-th exclusive-OR logic operation becomes different from system to system resulting in different ciphering method for each system. The key code is set in an EEPROM in the process of control system production so that the rolling code may not be deciphered even by a design engineer as long as the key code is kept undisclosed.

This invention discloses one triangle wave phase modulation method and device of resonance chamber fiber top, wherein, the laser is connected to first couple device, first phase modulator, second couple device, third couple device, fourth couple device, second phase modulation device and first couple; the first phase modulation and first triangle wave signal generator are connected; the second phase modulation and second triangle signal generator are connected; the second couple device and first photoelectricity, first high speed digital signal processor and laser are connected; the fourth couple device is connected to fourth couple device, second photoelectricity detector, second high speed digital processor; the third couple device is connected to the fiber ring.

An analog to digital converter (ADC) can include a multi-input comparison unit configured to compare a pixel voltage from an image sensor, a comparison voltage comprising a stepped voltage modified during a coarse mode of operation, and a ramp voltage comprising a ramped voltage modified to one another during a fine mode of operation, to provide a comparison result signal that indicates whether the comparison voltage combined with the ramp voltage is greater than or less than the pixel voltage. A selection control signal generation unit can receive the comparison result signal and a mode control signal, to indicate the coarse or fine mode, to provide a selection control signal allowing modification of the comparison voltage in the coarse mode and to hold the comparison voltage constant in the fine mode. A reference voltage selection unit can receive the selection control signal to control modification of the comparison voltage.

A method and apparatus for computing correlating images for image recognition is provided. In particular, the method is used to compare images of a biometric object to authorize an individual or verify whether an individual is the person he claims to be. The biometric objects may include fingerprints, hand or palm prints, and retina scans. The method uses a deviation of symmetry of correlation functions to determine whether the images are of a same object.

In order to transmit high-speed digital signals of several tens of GHz through differential lines, a signal transmission system for transmitting digital signals between circuit blocks via signal transmission lines is provided by connecting a ground-referenced differential line to a non-ground-referenced differential line, Each circuit block basically includes a functional circuit, a receiving/transmitting circuit formed separately from the functional circuit, and an impedance-matched transmission line (115) formed between the receiving end and the transmitting end of the receiving/transmitting circuit; reference ground (110) The differential line (105) is drawn from the differential output driver, and a differential signal line is formed symmetrically with respect to the ground (110) in the circuit block. In the signal transmission line (115), there are only differential pair lines that are not referenced to ground (111, 112) extend directly from differential signal lines arranged symmetrically with respect to ground potential.

This invention discloses a method for realizing superior position of signals for locomotives , in which, a locomotive-carried digital transmission broadcast station and a station ground digital transmitted broadcast station are applied for the wireless locomotive signals to make up of a wireless channel so as to get signals and entry information from the chain interfaces directly to set up a corresponding relation between the train and entry combining with the train position to form signal information to be sent to the locomotive via the channel to be compared with the feedback signal to determine the effectiveness of the signals, which utterly breaks away from the restrict of railway circuit, interference of adjacent lines and half intrusion.

To provide a machine component with an IC tag affixed thereto, in which with the IC tag having an increased storage capacity, the IC tag can be mounted with no difficulty and, also, reading or writing of information from or in the IC tag, respectively, can be facilitated. A plurality of IC tags 2 are attached to a machine component, which forms a part of a rolling bearing assembly 1, or to a machine component and an accessory with division made therebetween. Those plural IC tags 2 have different information stored therein. Where the machine component is a retainer incorporated rolling bearing assembly 1, those plural IC tags are attached to a roller retainer 5 at respective locations symmetrical with each other about the axis O of rotation thereof.

Disclosed is an analog to digital converter with several cascade-connected interpolation and selection circuits. The function of an interpolation circuit is to produce five pairs of output signals from three pairs of input signals and select three pairs from among the five pairs to apply them to the next stage. Each pair comprises two interpolation signals that vary symmetrically and monotonically as a function of the voltage Vin, the signals of one pair being equal when the voltage Vin is equal to a reference voltage associated with this pair. There are five reference voltage associated with the five pairs. Among these five reference voltages, the three reference voltages (and therefore also the three corresponding pairs of signals) that most closely surround the input voltage Vin are selected. The reference voltages are increasingly closer together as the operation progresses in the succession of cascade-connected stages. The signals used to select the pairs of signals are used in a decoder that gives the bits of the analog-digital conversion.

A showing management system for automatically controlling access to an electronic lockbox utilizing showing appointment data maintained by the showing management system, whereby the showing appointment data is transmitted to the electronic lockbox and/or electronic key device. The electronic lockbox will open only when the actual access time is within the scheduled showing appointment time. The showing management system further programmatically matching a specific electronic lockbox with a specific Listing ID, whereby lockbox access data from an electronic lockbox are matched with showing appointment records maintained in the showing management system to complete the lockbox access records when the Listing ID for a particular showing appointment is missing from the lockbox access record.

A method is provided for using telemetry data based on user habit information or user monitoring. One or more sensors of a monitoring device detects or measures user information selected from of at least one of, a user's activities, behaviors and habit information, and a user's health. The user information is received at a telemetry system with a database. One or more analysis tools at the telemetry system are used for the analysis. Analysis information is produced that is sent to the monitoring device.

The invention discloses a sampling hold circuit which comprises a clock generation sub-circuit, a grid voltage bootstrap unit and a sampling hold sub-circuit, wherein the clock generation sub-circuit is provided with a first output end and a second output end, the first output end and the second output end are both connected with the grid voltage bootstrap unit, the sampling hold sub-circuit comprises a sampling switch and a holding capacitor, and the grid voltage bootstrap unit is further connected with an external power supply and the sampling switch. The sampling hold circuit further comprises a leak-proof sub-circuit which is connected between a bootstrap capacitor of the grid voltage bootstrap unit and the ground, and the leak-proof sub-circuit is further connected with the clock generation sub-circuit and the external power supply. When the sampling hold sub-circuit is switched from a hold mode to a sampling mode, the bootstrap capacitor and the ground are disconnected by the leak-proof sub-circuit. According to the sampling hold circuit, leakage of electric charge on the bootstrap capacitor in a hold and sampling switching process is effectively prevented, and reducing of bootstrap voltage is prevented, and the degree of linearity of the sampling switch is guaranteed.

A security system for a mobile phone is disclosed for securing private information of the mobile phone. The system may set at least two PIN numbers for a super user and a general user, encrypt a phone book system of the mobile phone by setting a security status for each contact in a phone book system of the mobile phone. The system also may start a secure work mode if a user of the mobile phone is a super user and starting a non-secure work mode if the user is a general user of the mobile phone. A security method for a mobile phone is also disclosed.

A transmitter for radio control with rotary control means on its both sides is provided.

The invention discloses a method and a device for determining a region of an ammeter by detecting signal intensity. According to the method, when a master station discovers that two concentrators collects the data transmitted by the same ammeter, the two concentrators are enabled to detect the intensity of a received signal transmitted by the ammeter, the ammeter can be determined to belong to a party with high receiving signal intensity, so that the crosstalk problem in an automatic meter reading system can be solved. The device comprises a signal collecting module, a concentrator data transmission module, a signal intensity detection module and a region determining module, wherein the signal collecting module is used for respectively collecting the data transmitted by the ammeter in each region for the corresponding concentrator; the concentrator data transmission module is used for transmitting the data of the ammeter, collected by each concentrator, to the master station; the signal intensity detection module is used for transmitting a command for enabling the two concentrators to respectively detect the intensity of the signal transmitted by the same ammeter when the two concentrators are discovered by the master station to collect the data transmitted by the same ammeter; the region determining module is used for judging that the same ammeter belongs to the region corresponding to the concentrator with high received signal intensity.

A monitoring device in accordance with the disclosure stores a serial number list in non-volatile memory, the serial number list including data indicative of at least one valid serial number associated with one or more key fobs permitted to interact with the monitoring device. The monitoring device is configured to receive a wakeup signal via a key fob interface configured to communicate with a key fob. The monitoring device reads a serial number from a key fob via the key fob interface and searches the stored serial number list for data indicative of a valid serial number matching the serial number read via the key fob interface. The monitoring device reads action data from the key fob via the key fob interface, the action data being indicative of an action to be taken by the monitoring device. The monitoring device, in response to the read serial number matching a valid serial number of the stored serial number list, takes an action based on the action data.

The invention provides a digital background calibration device for a pipeline ADC. The device comprises multiple cascaded sub pipelines and a calibration circuit. Each sub pipeline comprises a sampling/holding circuit, a residue amplifier, a Sub-ADC and a Sub-DAC. Analog signals pass through each sub pipeline of the pipeline ADC in order. A pseudo random sequence generated by the calibration circuit is input to the Sub-DAC of the calibrated-level sub pipeline while analog quantity is input to the calibrated-level sub pipeline. The calibration circuit uses the pseudo random sequence and digital values that are converted by all sub pipelines subsequent to the calibrated-level sub pipeline and are already calibrated to calibrate digital values that are converted by the calibrated-level sub pipeline, so as to obtain digital values which are converted by the calibrated-level sub pipeline and are already calibrated. The digital background calibration device of the invention overcomes the defects caused by modification of analog circuits as to existing calibration algorithms and can simultaneously correct errors caused by capacitor mismatch and finite gains of operational amplifiers, without interrupting normal work of ADCs or changing the original analog circuit design. In particular, errors introduced by the calibration algorithm are reduced, the calibration cost is low and the calibration accuracy is high.