Current source for generating a constant reference current

Details Current source for generating a constant reference current Current source for generating a constant reference current

2006-09-19

2006-09-19

Callahan, Timothy P. (Department: 2816)

Miscellaneous active electrical nonlinear devices, circuits, and

Specific identifiable device, circuit, or system

With specific source of supply or bias voltage

C323S315000

Reexamination Certificate

active

07109785

ABSTRACT:
Current source for generating a constant reference current having an amplifier circuit, which outputs a negative feedback voltage, present across a first resistor, in inverted amplified fashion as amplification output voltage; a first voltage/current converter, which generates a current in a manner dependent on the amplifier output voltage; a first current mirror circuit, which mirrors the current generated by the voltage/current converter to form a mirrored current which flows through the first resistor in order to generate the negative feedback voltage; and having a second current mirror circuit, which mirrors the current generated by the voltage/current converter to form the reference current.

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Geiger et al., “VLSI Design Techniques for Analog and Digital Circuits”, McGraw-Hill, International Edition 1990, pp. 363-365, (3 pages).

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