Faraday Technology Corporation

Yi-Hwa Chang

Hung-Yi Chang

Jeng-Huang Wu

Shang-Chih Hsieh

A power gating circuit of a signal processing system includes a low dropout linear regulator, a control circuit, and an output circuit. The low dropout linear regulator includes a first transistor, an operational amplifier, a first resistor, a second resistor, and an output end. The output circuit includes a fourth transistor and a step-down circuit. The control circuit controls output voltage of the output circuit according to a control signal.

Power gating circuit of a signal processing system

A high speed voltage level shifter for use in circuitry having core circuits operating at a very low supply voltage includes a boost circuit for producing a boosted signal in accordance with a non-inverted input signal, and a voltage shifting stage for producing an output signal in response to an inverted input signal and the boosted signal. The boost circuit translates the boosted signal into a middle voltage level when the non-inverted input signal is at logic '0'. When the inverted input signal and the boosted signal are both at the logic '0', the voltage shifting stage provides the output signal with a high voltage level. Otherwise, the voltage shifting stage pulls down the output signal to ground when the boosted signal is at the middle voltage level and the inverted input signal is at a low voltage level equal to the very low supply voltage level.

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Hsin-Chu Hsien, Taiwan

Yi-Hwa Chang