Signel processing circuit capable of selectively adjusting gain factor of sample-and-hold circuit and signal processing method thereof
AssigneeHimax Imaging Limited
InventorsPing-Hung Yin, Shih-Feng Chen
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Abstract
A signal processing circuit including an amplifying circuit, a control circuit, and a sample-and-hold circuit is provided. The amplifying circuit receives an analog input signal and outputs a first analog signal by amplifying the analog input signal. The control circuit outputs a control signal according to the analog input signal. The sample-and-hold circuit is coupled to the amplifying circuit and the control circuit to selectively adjust a gain factor of the sample-and-hold circuit according to the control signal, thereby outputting a second analog signal according to the first analog signal and the gain factor.
Claims20
A signal processing circuit, comprising:
- an amplification circuit, for receiving an analog input signal and outputting a first analog signal by amplifying the analog input signal;
- a control circuit, for outputting a control signal according to the analog input signal;
- and
- a sample-and-hold circuit, coupled to the amplifying circuit and the control circuit, for selectively adjusting a gain factor of the sample-and-hold circuit according to the control signal to thereby output a second analog signal according to the first analog signal and the gain factor.
A signal processing method, comprising:
- receiving an analog input signal and outputting a first analog signal by amplifying the analog input signal;
- outputting a control signal according to the analog input signal;
- selectively adjusting a gain factor of a sample-and-hold circuit according to the control signal;
- and
- utilizing the sample-and-hold circuit to output a second analog signal according to the first analog signal and the gain factor.
Dependencies are inferred from the claim text.