Current mirror circuit

Details Current mirror circuit Current mirror circuit

2008-04-08

2010-11-09

Patel, Rajnikant B (Department: 2838)

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

07830202

ABSTRACT:
The present invention discloses a current mirror circuit generating an output current flowing through an output current path according to an input current flowing through an input current path. The current mirror circuit comprises a P type transistor in the output current path, an operational amplifier, and a basic circuit. The operational amplifier has a negative input coupled to a node receiving the input current, a positive input coupled to a drain of the P type transistor, and an output coupled to a gate of the P type transistor. The basic circuit comprises a first transistor in the input current path and a second transistor in the output current path. The first transistor has a gate and a drain coupled together. The second transistor has a gate coupled to the gate of the first transistor.

REFERENCES:
patent: 3975648 (1976-08-01), Tobey et al.
patent: 4399399 (1983-08-01), Joseph
patent: 5666046 (1997-09-01), Mietus
patent: 6181195 (2001-01-01), McIntyre
patent: 6838916 (2005-01-01), Premont et al.

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