Clock generator generating trapezoidal waveform

Details Clock generator generating trapezoidal waveform Clock generator generating trapezoidal waveform

1990-02-08

1991-06-18

Miller, Stanley D.

Electrical transmission or interconnection systems

Nonlinear reactor systems

Parametrons

307269, 307263, 307582, 328182, 328185, H03K 500, H03K 513

Patent

active

050251724

ABSTRACT:
An implantable cardiac defibrillator employing a switched capacitor filter stage having charge steering resistors connected in series with corresponding switched capacitors that are coupled to a sensitive node of an operational amplifier. The stored channel charges in associated switches when they are tuned off are directed away from the sensitive node. The switches associated with the switched capacitors are operated by control signals having a generally trapezoidal shaped waveform so as to slowly turn off the same, thereby reducing clock feedthrough and charge injection induced offset voltage on the output of the operational amplifier.

REFERENCES:
patent: 3621281 (1971-11-01), Hagen
patent: 3879683 (1975-04-01), Bosselaers
patent: 4282549 (1981-08-01), Balaban et al.
patent: 4322636 (1930-03-01), Schroder
patent: 4717848 (1988-01-01), Rabaey et al.

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