Bias circuit

Details Bias circuit Bias circuit

2008-07-23

2009-12-08

Tra, Quan (Department: 2816)

Miscellaneous active electrical nonlinear devices, circuits, and

Specific identifiable device, circuit, or system

With specific source of supply or bias voltage

C327S563000

Reexamination Certificate

active

07629835

ABSTRACT:
A gm compensation current source controls current that runs through a current source transistor, source-grounded transistors that determine a gain so that mutual conductance gm of the source-grounded transistors is compensated and the gain is compensated. A 1/r current source runs current inversely proportional to variation of load resistors of an amplifier so that gate bias points of gate-grounded transistors that are connected to the source-grounded transistors remain constant, and deterioration of linearity at a drain terminal of a gate-grounded transistor is suppressed.

REFERENCES:
patent: 5818294 (1998-10-01), Ashmore, Jr.
patent: 7323932 (2008-01-01), Matsushita
patent: 7417415 (2008-08-01), Yen et al.
patent: 7456692 (2008-11-01), Maruyama et al.
Behzad Razavi. “Design of Analog CMOS Integrated Circuits” McGraw-Hill Publishing Co., 2001, pp. 375-379.
David A. Johns, et al. “Analog Integrated Circuit Design” John Wiley & Sons, Inc. 1986, pp. 450-451.

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