Sample and hold circuit

• Main Authors: Garrity, Douglas A, Shiwale, Rakesh, Kabir, Mohammad Nizam U
• Format: Patent
• Language: English; French; German
• Published: 18.10.2017
• Subjects: INFORMATION STORAGE; PHYSICS; STATIC STORES

A sample and hold circuit (100, 400) is provided. The circuit includes a plurality of switches (130-141, 430-453), a first capacitor (120, 420), an operational amplifier (110, 410) having a first input selectively coupled to the first capacitor (120, 420) and an output, a second capacitor (121, 421) and a third capacitor (122, 422) both selectively coupled to the first capacitor (120, 420) and both selectively coupled between the first input of the operational amplifier (110, 410) and the output of the operational amplifier (110, 410), wherein the plurality of switches are configured to receive a plurality of control signals such that the first capacitor (120, 420) is configured to sample an input signal in a sample phase and to transfer a charge to one of the second capacitor (121, 421) and the third capacitor (122, 422) in a hold phase, and the second capacitor (121, 421) and third capacitor (122, 422) are configured to alternate between holding the transferred charge and resetting in any back-to-back hold phases.