Compensated oscillator circuit for charge pumps

Details Compensated oscillator circuit for charge pumps Compensated oscillator circuit for charge pumps

2005-05-03

2005-05-03

Nguyen, Tan T. (Department: 2818)

Static information storage and retrieval

Read/write circuit

Including level shift or pull-up circuit

C365S211000, C365S226000, C331S175000, C331S176000

Reexamination Certificate

active

06888763

ABSTRACT:
A charge pump oscillator circuit with compensation for variations in process and operating environment. The charge pump oscillator is designed with a rolloff characteristic that enables operation at both weak and strong process corners without excessive power consumption. Composite resistors in the oscillator circuit are composed of component resistors that are fabricated with different processes, e.g., implant and deposition. The resistance of the composite resistor is thus in order to provide compensation for variations in processing and operating environment. The composite resistor may be used as a feedback loop resistor, or may be used as a source degenerate resistor to control the supply current to the oscillator.

REFERENCES:
patent: 4851792 (1989-07-01), Ochiai et al.
patent: 5841725 (1998-11-01), Kang et al.
patent: 6100748 (2000-08-01), Oh
patent: 6240033 (2001-05-01), Yang et al.
patent: 6535435 (2003-03-01), Tanaka et al.
patent: 6654296 (2003-11-01), Jang et al.
patent: 6788577 (2004-09-01), Mihara

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