Low power digital CMOS compatible bandgap reference

Details Low power digital CMOS compatible bandgap reference Low power digital CMOS compatible bandgap reference

1997-02-28

2000-06-13

Cunningham, Terry D.

Miscellaneous active electrical nonlinear devices, circuits, and

Specific identifiable device, circuit, or system

With specific source of supply or bias voltage

327541, 323316, G05F 110

Patent

active

060754079

ABSTRACT:
An improved bandgap reference circuit that uses ratioed current mirrors to provide loop gain and minimize the offset sensitivity of the loop amplifier. Furthermore, the combination of both current and diode area ratioing provides a larger effective .DELTA.V.sub.be which in turn reduces circuit sensitivities to resistor ratio values. The circuit features a high gain folded cascode amplifier for fast response, and stable start-up and power down modes. The circuit design required no trims, calibrations, or adjustments using a standard submicron digital CMOS fabrication process, and achieved a simulated reference output level with less than 1% drift over time, temperature, and process variations.

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CMOS Analog Circuit Design by Phillip E. Allen and Douglas R. Holberg, Oxford University Press (1987), Chapter 11, pp. 589-599.
The Best of Analog Dialogue, 25th Anniversary Bonus Edition (1991), pp. 71-72.

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