RATIO-INDEPENDENT SWITCHED CAPACITOR AMPLIFIER WITH PRECISION GAIN OF TWO AND OPERATION METHOD THEREOF

摘要

A ratio-independent switched capacitor amplifier with a double precision gain and an operation method thereof are provided to obtain the double gain through one amplification process and one sampling process, thereby processing an input signal at high speed. A ratio-independent switched capacitor amplifier comprises a first sampling circuit(20), a second sampling circuit(30), and a differential amplification circuit(10). The first sampling circuit samples a first input voltage to a first sampling voltage, and doubles a level of the first sampling voltage for the section where the first input voltage is interrupted. The second sampling circuit samples a second input voltage to a second sampling voltage, and doubles a level of the second sampling voltage for the section where the second input voltage is interrupted. The differential amplification circuit outputs a difference between the first sampling voltage and the second sampling voltage.