Switched capacitor feedback sample-and-hold circuit

Details Switched capacitor feedback sample-and-hold circuit Switched capacitor feedback sample-and-hold circuit

1982-12-20

1985-09-17

Zazworsky, John

Electrical transmission or interconnection systems

Personnel safety or limit control features

Interlock

307359, 328151, G11C 2702

Patent

active

045423040

ABSTRACT:
The feedback sample-and-hold stages of a transversal filter bank include a primary sample-and-hold branch and a secondary sample-and-hold branch for correction of offset voltage in the primary branch which results from switching charge feedthrough of its sampling switch. A pair of N-channel buffer transistors, one an enhancement type and one a depletion type, are so connected to the branches that power supply noise is attenuated. Additionally, the parasitic capacitance of the enhancement transistor acts as a coupling capacitor for the correction function.

REFERENCES:
patent: 3586880 (1971-06-01), Fitzwater, Jr.
patent: 4370572 (1983-01-01), Cosand et al.

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