Integrated negative D-C bias circuit

Details Integrated negative D-C bias circuit Integrated negative D-C bias circuit

1997-02-12

1998-05-26

Callahan, Timothy P.

Miscellaneous active electrical nonlinear devices, circuits, and

Specific identifiable device, circuit, or system

With specific source of supply or bias voltage

327530, G05F 110

Patent

active

057572232

ABSTRACT:
A voltage inverter provided as part of a low power amplifier system includes a charge pump capacitor, a charging inverter circuit for charging the charge pump capacitor in response to clock pulses, a FET grounding switch interposed between the charge pump capacitor and ground so that the charge pump capacitor can accumulate charge, an output storage capacitor for providing inverted voltage at the voltage inverter output, an output series switch interposed between the charge pump capacitor and the output storage capacitor for controlling charge transfer to the output storage capacitor; and a grounding switch driver circuit that includes a gate drive inverter, a gate drive pulldown coupled between the charge pump capacitor and the grounding switch so as to rapidly turn off the grounding switch at the outset of the charge transfer cycle, and a gate drive isolation switch interposed between the gate drive inverter output and the gate drive pulldown and responsive to the gate drive inverter output to prevent conduction between the gate drive inverter and the pulldown during the charge transfer phase.

REFERENCES:
patent: 4378506 (1983-03-01), Taira
patent: 4585954 (1986-04-01), Hashimoto et al.
patent: 4754168 (1988-06-01), Liran
patent: 4920280 (1990-04-01), Cho et al.
patent: 5041739 (1991-08-01), Goto
patent: 5179296 (1993-01-01), Ito
patent: 5581455 (1996-12-01), Rossi et al.

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