Temperature tracking voltage to current converter

Details Temperature tracking voltage to current converter Temperature tracking voltage to current converter

1998-04-27

2000-10-24

Cunningham, Terry D.

Miscellaneous active electrical nonlinear devices, circuits, and

Specific identifiable device, circuit, or system

With specific source of supply or bias voltage

327101, 323315, H03K 110

Patent

active

06137346&

ABSTRACT:
A programmable and precise voltage-to-current converter (a.k.a. current source) that tracks temperature variations is presented. The voltage-to-current converter is implemented by placing a voltage reference circuit between the bases of the two transistors, or alternatively between a diode and a transistor, in a voltage controlled current source circuit which can be adjusted to track temperature variations. In one embodiment, the voltage reference circuit is a programmable digital-to-analog (D/A) converter. In a second embodiment, the voltage reference circuit is a differential amplifier.

REFERENCES:
patent: 4906915 (1990-03-01), Abdi
patent: 5151903 (1992-09-01), Mydill et al.
patent: 5581177 (1996-12-01), Hussey et al.
patent: 5631599 (1997-05-01), Bacrania et al.
patent: 5913022 (1999-06-01), Tinaztepe et al.

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