Variable gain correlated double sampling circuit with baseline adjustment
A correlated double sampling and circuit technology, applied in TV, electrical components, color TV, etc., can solve the problems of low dynamic range utilization rate of analog-to-digital converter, weak anti-common mode interference ability, complex structure, etc. The effect of subsequent processing circuit, strong applicability and simple circuit structure
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[0035] The technical solution of the present invention will be further elaborated in combination with the drawings and embodiments.
[0036] figure 2 It is a schematic structural diagram of a variable gain correlated double sampling circuit with baseline adjustment in an embodiment of the present invention, such as figure 2 As shown, this embodiment discloses a variable gain correlated double sampling circuit with baseline adjustment, including: a first switched capacitor network 1 and an amplifier 2;
[0037] The charge retention node 101 of the first switched capacitor network 1 is connected to the negative input terminal of the amplifier 2, and the output node 102 of the first switched capacitor network 1 is connected to the output terminal of the amplifier 2. The positive input terminal of 2 is connected to the input common mode level.
[0038] Further, the first switched capacitor network 1 includes: two fixed-value capacitors, one variable-value feedback capacitor, and three ...
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