Controlled impedance transistor switch circuit

Details Controlled impedance transistor switch circuit Controlled impedance transistor switch circuit

1995-05-01

1998-11-10

Shoop, Jr., William M.

Electrical transmission or interconnection systems

Combined impedance and switch systems

327270, 327391, 327437, 307 98, 307104, H03K 1716

Patent

active

058348603

ABSTRACT:
An output driver circuit comprises a plurality of parallel pull up and pull down circuits each comprising at least one transistor switch switchable between on and off states and circuitry operable to maintain a desired resistance in the circuit when the transistor switch is switched on, and switch actuating circuitry including time delay circuitry for effecting a sequence of transistor switching operations in said pull-up and pull-down circuits with a time delay between successive operations, each operation effecting simultaneous switching of a transistor in one pull-up circuit and one pull-down circuit, whereby the output impedance is stabilised during a change in signal on the output terminal.

REFERENCES:
patent: 4985644 (1991-01-01), Okihara et al.
patent: 5111075 (1992-05-01), Ferry et al.

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