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US 12,407,312 B2Granted
Sample-and-hold amplifier
AssigneeSilergy Semiconductor Technology (Hangzhou) LTD
InventorsLin Song, Guangyang Qu
Life of this patent
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Abstract
A sample-and-hold amplifier can include: an operational amplifier; a sampling capacitor having a first terminal coupled to an inverting input terminal of the operational amplifier, and a second terminal coupled to a reference ground; and a switching circuit configured to switch feedback paths of the sample-and-hold amplifier in a first stage and a second stage, such that an offset voltage of the operational amplifier is at least partially eliminated.
Claims14
A sample-and-hold amplifier, comprising:
- a) an operational amplifier comprising a switch module;
- b) a sampling capacitor having a first terminal coupled to an inverting input terminal of the operational amplifier, and a second terminal coupled to a reference ground;
- c) a switching circuit configured to switch feedback paths of the sample-and-hold amplifier in a first stage and a second stage, such that an offset voltage of the operational amplifier is at least partially eliminated;
- and
- d) wherein an output terminal of the operational amplifier is respectively coupled via the switch module to different circuit nodes therein in the first stage and the second stage.
2 more elements
Dependencies are inferred from the claim text.