Method and apparatus including a driver for driving a...

Details Method and apparatus including a driver for driving a... Method and apparatus including a driver for driving a...

2007-12-31

2010-02-09

Wells, Kenneth B. (Department: 2816)

Miscellaneous active electrical nonlinear devices, circuits, and

Signal converting, shaping, or generating

Current driver

C326S082000

Reexamination Certificate

active

07659755

ABSTRACT:
A switch for switchably coupling a signal source to a high impedance load. The switch includes a first bipolar transistor and a floating switch driver. The first bipolar transistor is configured to switchably couple the signal source to the high impedance load responsive to a driver signal applied to a base thereof. The floating switch driver has a control input and an output terminal coupled to the base of the first bi-polar transistor to supply the driver signal thereto. The driver signal comprises a limited forward current during the “On” state of the floating switch driver and a voltage “Voff” not less than the reverse breakdown voltage nor greater than the forward voltage drop across a base-emitter connection of the first bipolar transistor during the “Off” state of the floating switch driver.

REFERENCES:
patent: 3215859 (1965-11-01), Sorchych
patent: 4682061 (1987-07-01), Donovan
patent: 4814644 (1989-03-01), Yamakawa
patent: 5414382 (1995-05-01), Larson et al.
patent: 6556063 (2003-04-01), Wyland
patent: 6597592 (2003-07-01), Carsten
patent: 7119586 (2006-10-01), Hornkamp
patent: 7271614 (2007-09-01), Khoo et al.

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