On-chip regulator providing good high frequency rejection and no

Details On-chip regulator providing good high frequency rejection and no On-chip regulator providing good high frequency rejection and no

1997-07-09

1999-08-24

Cunningham, Terry D.

Miscellaneous active electrical nonlinear devices, circuits, and

Specific identifiable device, circuit, or system

With specific source of supply or bias voltage

327538, 327545, 323315, G05F 110

Patent

active

059429348

ABSTRACT:
A power supply filter has a primary current source coupled to a node carrying a power supply signal. The second end of the primary current source is coupled to an impedance that is further coupled to a low voltage node. A differential amplifier having an inverting input, a non-inverting input, and an output, has its non-inverting input coupled to the junction between the impedance and the primary current source. The output of the differential amplifier carries the filtered power supply signal and is coupled to a capacitance. The capacitance is coupled between the output and a lower voltage. A feedback path is coupled between the output and the inverting input.

REFERENCES:
patent: 5061862 (1991-10-01), Tamagawa
patent: 5220206 (1993-06-01), Tsang et al.
patent: 5335203 (1994-08-01), Ishii et al.
patent: 5489873 (1996-02-01), Kamata et al.
patent: 5689460 (1997-11-01), Ooishi

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