Seeya Optronics Co., Ltd.

Chih-pu Yeh

Ping-lin Liu

A voltage converter comprises a current mirror circuit, a switch circuit, and a bias circuit electrically connected to a substrate of the switch circuit. When an electrical signal provided by the first electrical signal end is greater than an electrical signal provided by the second electrical signal end, the bias circuit is turned on to turn on the switch circuit, thereby an output end of the mirror current circuit outputs the electrical signal provided by the second electrical signal end. Otherwise, the output end of the current mirror circuit outputs the second voltage signal.

Voltage converter

A voltage regulator includes an error amplification circuit, a voltage detection circuit, a loop current prevention circuit, a voltage regulation circuit, and a stable voltage output terminal; the voltage regulation circuit outputs a voltage of the second power supply to the stable voltage output terminal when receiving a first control signal and second control signal output by the voltage detection circuit and stops outputting the voltage of the second power supply when receiving a third control signal and fourth control signal output by the voltage detection circuit; the loop current prevention circuit prevents a loop from being formed between the first power supply and the stable voltage output terminal when receiving the first control signal and the second control signal and controls the error amplification circuit to output an error amplification signal to the stable voltage output terminal when receiving the third control signal and the fourth control signal.

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Shanghai, China

Chih-pu Yeh