Amplifiers – With semiconductor amplifying device – Including current mirror amplifier
Reexamination Certificate
2006-09-26
2006-09-26
Nguyen, Khanh V. (Department: 2817)
Amplifiers
With semiconductor amplifying device
Including current mirror amplifier
C330S292000
Reexamination Certificate
active
07113044
ABSTRACT:
A voltage-to-current conversion circuit includes an error amplifier (12A) which amplifies a voltage difference between the drains of the first (6) and second (7) transistors of a first current mirror, wherein drain current of the first transistor is proportional to an input voltage (Vin). The output of the error amplifier is connected to the gates of the first and second transistors. A compensation capacitor is coupled between the gate and drain of the first transistor. The drain current of the second transistor flows through a cascode transistor (16) to an input of a second current mirror, an output transistor (31) of which provides a current (Ibias) which is proportional to the input voltage (Vin) as a bias current for the error amplifier, to provide stable operation.
REFERENCES:
patent: 6028480 (2000-02-01), Seevinck et al.
Brady III W. James
Nguyen Khanh V.
Telecky , Jr. Frederick J.
Texas Instruments Incorporated
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