3results about How to "Small circuit size" patented technology

The present invention provides a fully digital laser frequency stabilization system based on a system on chip, which includes a board-level power supply module, a signal generation module, a data acquisition module, a digital signal processing module, a peak search module, a PID module, a data output module, a data cache module and a data communication module; the digital signal processing module and the signal generation module use the FPGA chip of the system on chip; the digital signal processing module is used to demodulate and low-pass filter the reflected signal of the frequency stabilization optical system; the signal generation module is used to generate a swept frequency sawtooth wave signal, a modulated sine signal, and an IQ demodulated sine and cosine signal; the PID module is based on the ARM processor of the system on chip, and the PDH error signal is subjected to a PID algorithm to obtain a PZT feedback control signal and a temperature feedback control signal. The present invention uses the system on chip as the control core, the FPGA chip is responsible for data acquisition, digital signal processing, and data output, and the ARM processor is responsible for the PID control algorithm and inverse tangent calculation, and can stabilize the output optical frequency of the laser.

This invention relates to a bridgeless PFC circuit structure and power supply device. The circuit includes a first switching transistor, a first energy storage inductor, a first EC charging module, a second EC charging module, and a charging control module. One end of the first energy storage inductor is connected to the live wire terminal of the power supply device, one end of the first EC charging module, and one end of the second EC charging module. The other end of the first energy storage inductor is connected to the first terminal of the first switching transistor, the other end of the first EC charging module, and the other end of the second EC charging module. The second terminal of the first switching transistor is connected to the neutral wire terminal of the power supply device. The charging control module is connected to the third terminal of the first switching transistor, the first EC charging module, and the second EC charging module, respectively, to control the conduction or cutoff of the first switching transistor, the first EC charging module, and the second EC charging module. This reduces circuit losses caused by the rectifier bridge, improves circuit efficiency, and reduces circuit size.

The invention relates to a power management circuit and a chip thereof, a power supply module, an electronic device and a voltage regulation method, electricity is directly taken from a battery module through a first conversion module and a second conversion module, and primary voltage conversion processing is carried out, so that extra power consumption generated when a charge pump is converted into single cell voltage can be reduced, the overall conversion efficiency is improved, and the power consumption is reduced. The power supply efficiency of the power management circuit is greatly improved; the overall loss is reduced; moreover, the power management circuit can provide two kinds of driving voltages for the same load circuit at the same time, so that the load circuit does not need to carry out multi-stage conversion processing again and does not need to introduce additional input voltage, additional loss is reduced as well, and the loss of the whole machine is further reduced.