Resistorless bias current generation circuit

Details Resistorless bias current generation circuit Resistorless bias current generation circuit

2007-06-05

2007-06-05

Zweizig, Jeffrey (Department: 2816)

Miscellaneous active electrical nonlinear devices, circuits, and

External effect

Temperature

C327S538000, C327S539000

Reexamination Certificate

active

11225587

ABSTRACT:
A bias current generating circuit generates a reliable and consistent bias current, irrespective of variation in applied power, process and temperature. In one embodiment, the bias current generator generates a bias current using a PTAT current generator and an IPTAT current generator comprising exclusively active circuit elements, for example transistors. No passive elements, such as resistors, are employed. The generated bias current is substantially a function of the respective aspect ratios of transistors of current paths of the device. In this manner, the resulting generated bias current has greatly reduced susceptibility to variation in applied power, process and temperature.

REFERENCES:
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patent: 6107868 (2000-08-01), Diniz et al.
patent: 6201436 (2001-03-01), Hur et al.
patent: 6448844 (2002-09-01), Cho
patent: 7026860 (2006-04-01), Gheorghiu et al.
patent: 183549 (1998-12-01), None

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