Sample and hold circuit particularly for small signals

Details Sample and hold circuit particularly for small signals Sample and hold circuit particularly for small signals

H - Electricity

04

N

328/171, 350/83

H04N 5/58 (2006.01) H04N 9/72 (2006.01)

Patent

CA 1171920

RCA 75,749 ABSTRACT A signal sampling circuit comprising a signal inverting amplifier/(65) with a gain greater than unity, an input clamp network/(68,84) including a feedback switch,/(68) and an output sampling network including a charge storage device (70) and a sampling switch/(78)is disclosed. The amplifier input to which signals to be sampled are applied is clamped to the amplifier output potential via the feedback switch (68) during non-sampling, clamping intervals. During subsequent sampling intervals, the feedback switch/(68) is disabled and the sampling switch/(78) is enabled to couple the amplifier output to the storage device/(70), so that the storage device develops a voltage sample of amplifier output signals referenced to the clamping potential.

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