Additive pulse sampling circuit

Details Additive pulse sampling circuit Additive pulse sampling circuit

1982-11-30

1985-08-20

Chin, Tommy P.

Facsimile and static presentation processing

Facsimile

Recording apparatus

358 27, 358 74, 358172, H04N 568, H04N 916

Patent

active

045368007

ABSTRACT:
An input pulse having an amplitude to be sampled is coupled to a sampling amplifier via an input circuit including a capacitance. A switch couples a reference voltage to the capacitance during reference intervals preceding sampling intervals. The reference voltage is decoupled at the end of the reference interval, at which time an auxiliary reference pulse is self-generated at the amplifier input by passive circuit elements associated with the input circuit. The auxiliary pulse exhibits an amplitude and sense for negating the response of the amplifier to the input pulse when the input and reference pulses exhibit mutually equal amplitudes at the amplifier input.

REFERENCES:
patent: 4277798 (1981-07-01), Hinn
patent: 4331981 (1982-05-01), Parker
patent: 4331982 (1982-05-01), Parker
patent: 4387405 (1983-06-01), Hinn
patent: 4484228 (1984-11-01), Parker

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