Gain adjusting and circuit arrangement

Details Gain adjusting and circuit arrangement Gain adjusting and circuit arrangement

2005-12-27

2005-12-27

Mottola, Steven J. (Department: 2817)

Amplifiers

With semiconductor amplifying device

Including differential amplifier

C330S305000

Reexamination Certificate

active

06980051

ABSTRACT:
The present invention relates to a method and circuit arrangement for adjusting a gain, wherein said circuit arrangement comprises at least a first output branch connected to a first load and a second output branch connected to a second load. The gain control function is realized based on a current splitting, wherein a non-operated output branch is used as a kind of dummy branch for receiving a part of the output current. Thus, only as many output branches as there are outputs are required to implement a gain control based on splitting. Thereby, a complexity of the layout design is reduced and control and biasing of dummy branches is not required.

REFERENCES:
patent: 5179292 (1993-01-01), Lee
patent: 6172566 (2001-01-01), Nguyen
patent: 1 006 669 (2000-06-01), None
patent: 1 096 697 (2001-05-01), None
“A Dual-Band RF Frond-End for WCDMA and GSM applications”, Ryynanen et al, IEEE 2000 Custom Integrated Circuits Conference, pp. 175-178, XP002902218.

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