Semiconductor integrated circuit device

Details Semiconductor integrated circuit device Semiconductor integrated circuit device

2011-03-01

2011-03-01

Choe, Henry K (Department: 2817)

Amplifiers

With semiconductor amplifying device

Including differential amplifier

C330S261000

Reexamination Certificate

active

07898332

ABSTRACT:
A semiconductor integrated circuit device includes: an amplifier circuit which respectively has one or more input terminals and one or more output terminals; a replica circuit which has the same DC characteristics as those of the amplifier circuit; a reference voltage generation circuit which is connected to a bias terminal of the replica circuit, and which generates a predetermined reference voltage at the bias terminal; and a feedback circuit which takes a difference between the reference voltage generated at the bias terminal of the replica circuit and the voltage generated at a bias terminal of the amplifier circuit, and which performs feedback control by providing negative feedback of the difference to the bias terminal of the amplifier circuit so that the voltage generated at the bias terminal of the amplifier circuit is made equal to the reference voltage generated at the bias terminal of the replica circuit.

REFERENCES:
patent: 5493253 (1996-02-01), Ogou
patent: 7109794 (2006-09-01), Killat
patent: 7391263 (2008-06-01), Koizumi et al.
patent: 7525381 (2009-04-01), Murden et al.
D. Yamazaki, et al., “2.5-GHz Fully-Integrated WiMAX Transceiver IC for a Compact, Low-Power-Consumption RF Module”, 2008 IEEE Radio Frequency Integrated Circuits Symposium, pp. 109-112. (pp. 110, Fig. 2).

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