16 results about "Signal source" patented technology

The disclosed embodiments provide a system that configures a computer system to switch between two graphics-processing units (GPUs). During operation, the system receives a request to switch from using a first GPU to using a second GPU to drive the display. In response to this request, the system executes a user thread that copies pixel values from a first framebuffer for the first GPU to a second framebuffer for the second GPU. Next, the user thread initiates a switch from the first framebuffer to the second framebuffer as a signal source for driving the display. Finally, the user thread sends an asynchronous notification of the switch to one or more applications, wherein the asynchronous notification allows the applications to transition from rendering graphics using the first GPU to rendering graphics using the second GPU.

The invention discloses an analog circuit for detecting the wire breaking of a displacement sensor LVDT, which comprises a displacement sensor LVDT, wherein a primary coil of the displacement sensor LVDT is connected with an excitation signal source. The analog circuit for detecting the wire breaking of the displacement sensor LVDT is characterized in that the output ends of the secondary coils of the displacement sensor LVDT are respectively connected with a test signal and are respectively connected with a multi-channel selection switch through a filter and rectifier circuit, and predetermined different groups and combinations of wire breaking voltages which are output when an LVDT is disconnected are simultaneously connected with the multi-channel selection switch; the two output end voltages of the secondary coils of the LVDT are respectively combined with a group of comparison voltages to be connected with each comparator, and each comparator is connected with the output control end of the multi-channel selection switch through an arithmetic logic OR unit, and the multi-channel selection switch is simultaneously connected with a servo amplifier. The invention can directly achieve the detection of wire breaking state only by a hardware circuit, and the method is simple and reliable.

The invention discloses a wide-dynamic high-accuracy and edge time adjustable impulse wave producing method which is characterized by including the following steps: (1) arranging an impulse generator; (2) building an impulse wave model according to waveforms of impulse signals generated by the impulse generator; (3) determining the amplitude modulation position according to the impulse wave model built in the step (2); (4) arranging an amplitude modulator; (5) setting a field programmable gate array (FPGA) waveform processing unit; (6) arranging a state machine and a direct digital frequency synthesizer (DDS) cooperating with the state machine in work; and (7) leading the state machine and the direct digital frequency synthesizer to cooperate in work and leading details of impulse waveforms after fine adjustment to be completely displayed. The wide-dynamic high-accuracy and edge time adjustable impulse wave producing method uses the method of amplitude for time, leads impulse edges and impulse width to be subjected to wide-dynamic and high-accuracy adjustment completely through the digital measures, simplifies complexity of a signal source analog channel circuit, saves cost and reduces production debugging operation difficulty.

This invention discloses an automatic calibration system and method for analog signal measurement apparatus, which comprises the following: PC machine used to control the calibration process of analog signal measurement apparatus; control card connected with PC machine and used to receive group information and perform the control order sent by the PC machine and to send back the sample value and standard value to PC machine; communication card connected with control card and used to a communication connection between control card and analog signal measuring apparatus; responding signal source output apparatus to the analog signal measuring apparatus separately connected with communication card and analog signal measuring apparatus and used to generate standard value and send the signal to the analog signal measuring apparatus to get relevant sample value according to the group information.

The invention discloses a hybrid matrix dynamic intelligent EDID (extended display identification data) algorithm. The hybrid matrix dynamic intelligent EDID algorithm includes: (1) enabling a CPU (central processing unit) to read EDID information of display equipment at each output port; (2) according to current video switchover corresponding relation, mixing the EDID information of each same input port and each same output port according to strategies selected by a user; (3) generating a new EDID content, informing signal source equipment at each input port, outputting HPD (hot plug detect) signals after EDID preparation is finished, and enabling signal sources to read mixed EDID contents; (4) enabling signal source equipment to output to obtain video signals with optimal resolution. By the hybrid matrix dynamic intelligent EDID algorithm, the signal source equipment outputs optimal audio and video signals compatible to all display devices, the front-end signal source equipment is capable of reading information of the rear-end display devices, and consequently signal source input equipment is enabled to output high-compatibility signals accordant with HDMI (high-definition multimedia interface) standards.

The invention discloses a detection method against power conduction electromagnetic leakage. The method comprises that a conduction electromagnetic leakage red signal source generates an electromagnetic leakage red signal for simulating a conduction electromagnetic leakage signal, and the electromagnetic leakage red signal is coupled to a power line of the signal source; and a leakage signal detector receives and analyzes the signal in the reception end. The invention also discloses a detection device against power conduction electromagnetic leakage. The detection device comprises the conduction electromagnetic leakage red signal source and the leakage signal detector; the conduction electromagnetic leakage red signal source generates the electromagnetic leakage red signal for simulating the conduction electromagnetic leakage signal and couples the electromagnetic leakage red signal to the power line of the signal source; and the leakage signal detector receives and analyzes the signalin the reception end. Thus, the conduction leakage protection capability of equipment and system can be detected rapidly, and weak points can be located.

The invention provides a calibration method and system of a test system. The method comprises the following steps: controlling a signal source to enable a source signal to be input to a system input end of the test system, and enable the source signal to be input to a power amplification device through the input end of a device under test of the test system, wherein the power amplification device is used for carrying out amplification processing on the source signal to generate an amplification signal; and controlling a measuring instrument to read a first output signal at the system output end of the test system, calculating first insertion loss data of the test system according to the source signal, the first output signal and nominal value data of the power amplification device, and carrying out high-power calibration on the test system according to the first insertion loss data. The calibration method and system can calibrate the test system under large power, and can obtain the measurement data of the device under test in a large power state.

An apparatus for generating an output signal that is analogous to an first signal from a first signal source that exhibits a first jitter, so that the output signal exhibits less jitter than the first jitter includes at least one second signal source generates a second signal that is analogous to and phase locked with the first signal. The second signal exhibits a second jitter that is uncorrelated with the first jitter. A signal averaging device is responsive to the first signal and the second signal. The signal averaging device averages the first signal and the second signal with respect to at least one parameter and thereby generates the output signal.

The invention is suitable for the field of data statistics, and provides a signal source utilization investigation method of smart television. The method comprises the following steps that: 1, when the smart television is turned on, a signal source manager in the smart television sets the current signal source according to the signal source setting information set when the smart television is turned off last time; 2, when switching the signal source, the signal source manager sets the current signal source as the switched signal source, calculates the service time of the last signal source, and adds 1 to the utilization times of the last signal source; a signal source statistics module is used for obtaining the service time and the utilization times of the last signal source from the signal source manager, using the service time and the utilization times as the statistics data of the utilization of the signal source, and storing the statistics data; 3, the step 2 is executed repeatedly, until the smart television is turned off; and 4, when the smart television is turned on again, a data uploading module is used for uploading the statistics data of utilization of the signal source to the server side. The signal source utilization investigation method of smart television provided by the invention is simple and fast.

The invention provides a healthy sleep bed and an adjustment method thereof. The healthy sleep bed comprises a bed body, a signal source device, a filling device and a controller, wherein the bed bodyhas a lying surface for a human body to lie down; the signal source device is arranged at one side of the lying surface and comprises an elastic bag communicated with the filling device and a shape change sensor fixed to the elastic bag; the shape change sensor comprises a shape change contact layer for bearing shape change, a hollow hosepipe, and a soft layer; the hosepipe is clamped between theshape change contact layer and the soft layer; and fluid conductive adhesive or powdery conductive adhesive is arranged in the hosepipe. According to the healthy sleep bed and the adjustment method thereof, the volume of the elastic bag and the shape of the lying surface can be adjusted, so that a person lying on the healthy sleep bed has a relatively comfortable sleeping posture, thereby havingthe relatively high sleep quality.

The invention provides a ship hull paint state detection system. The ship hull paint state detection system comprises a cathode protection system, a data analysis unit, and a signal acquisition unit which is connected with the cathode protection system and the data analysis unit through electric connection respectively; the signal acquisition unit is used for acquisition of output current I and output voltage U of the cathode protection system, and sending the output current I and the output voltage U to the data analysis unit; the data analysis unit is used for determining whether ship hull paint is broken, and calculating and analyzing the broken position information of ship hull paint. The above structure is adopted by the ship hull paint state detection system, the ship hull paint state detection system is capable of taking a ship original cathode protection system as a signal source, realizing real-time monitoring on ship hull paint states, and determining whether ship hull paintis broken without adding of extra measuring sensors; and in addition, combination with ship travelling parameter K is adopted in analysis and calculation, ship hull paint broken positions can be obtained rapidly and accurately, ship hull paint maintenance is guided, ship travelling safety is ensured, and ship travelling maintenance cost is reduced.

A memory device includes a memory array and a frequency-to-voltage converter. The memory array includes a plurality of memory cells arranged in rows and columns, and gates of the memory cells in the same row are coupled to each other and connected to a word line. The frequency-to-voltage converter coupled between the word line and a clock signal source outside the memory device receives a clock signal, and correspondingly outputs different voltages to the word line in accordance with the frequency of the clock signal.

The invention discloses a clock frequency acquiring system and a clock frequency acquiring method. The clock frequency acquiring method includes A, connecting a tested clock signal source into the clock frequency acquiring system; B, sequentially generating clock signals of various frequencies from small to big by the clock frequency acquiring system, and judging whether the clock signals of various frequencies can be divided exactly by the tested clock signal source or not; C, when the clock signals of various frequencies can be divided exactly by the tested clock signal source, storing the clock signals, and calculating frequency of the tested clock frequency according to stored clock signals. By the system and the method, acquiring of frequency of high-frequency clock signals through low-frequency clock signals is realized without being influenced by factors like hardware conditions and cost.

The invention discloses an antenna device applied to a hand-held mobile terminal, and a switching method, and solves the problem that the hand-held effect has great influence on the antenna signal ofthe hand-held mobile terminal. The antenna device comprises: a feed-in antenna in feed connection with a multi-frequency signal source in a mobile terminal; and at least two parasitic antennas locatedat the two end sides of the feed-in antenna and forming coupling gaps with the feed-in antenna, wherein the feed-in antenna can be coupled with the parasitic antennas through the coupling gaps to generate resonance signals, each parasitic antenna is connected with a reference ground through a tuning switch, and the tuning switch is used for controlling the feed-in antenna to be coupled with the parasitic antenna to generate a resonance signal feed-in antenna. Through the antenna multi-branch switching design, the working parasitic antenna is selected, the position with the strongest signal absorption capacity of the human hand is avoided, and the influence of the human hand on the antenna performance is minimum in the left-hand and right-hand handheld scene.

The invention discloses a distance measuring device, which comprises a light source, a polarization controller, a first electro-optical modulator, a second electro-optical modulator, an optical circulator, a coupler, a 1/4 wave plate, a reflector, an analyzer, a photoelectric detector, a low-pass filter, a signal source, a first automatic gain amplifier, a second automatic gain amplifier and a measurement control unit. The invention further discloses a distance measuring method, which comprises the steps of outputting sinusoidal signals with the frequency changing continuously by using the signal source, controlling the first electro-optical modulator and the second electro-optical modulator to modulate the measurement light at the same time, and measuring demodulation waveform parametersto calculate the distance to be measured. The device is simple in structure and high in environmental adaptability, measurement errors caused by non-reciprocal and non-flat electrical characteristicsof the modulator can be effectively suppressed, and large-dynamic-range high-precision absolute distance measurement can be realized at the same time.