Process insensitive voltage reference

Details Process insensitive voltage reference Process insensitive voltage reference

2006-07-04

2006-07-04

Patel, Rajnikant B. (Department: 2838)

Electricity: power supply or regulation systems

Self-regulating

Using a three or more terminal semiconductive device as the...

C323S907000

Reexamination Certificate

active

07071673

ABSTRACT:
Several methods to obtain process insensitive base-emitter forward voltage of a transistor are described. The main concept is to recognize that the transistor current gain is the parameter that affects this voltage the most with normal process variations. The use of transistor driven with known base current removes this error. In alternative, a method for compensating the base-emitter forward voltage variations is described. This is applicable to analog integrated circuits that utilize the base-emitter forward voltage of a transistor and in particular in applications that make use of either accurate voltage references, thermal sensing elements, solid state thermostats and very common thermal shutdown protection circuits.

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A. Paul Brokaw, “A Simple Three Terminal IC Bandgap Reference”, IEEE Journal of Solid State Circuit, Dec. 1974,vol. SC-9,No. 6.
R. Pease, “The Design of Bandgap Reference Circuits: Trials and Tribulations”,IEEE 1990 Bipolar Circuit and Technology Meeting.

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