Apparatus for variable gain amplifiers and mixers

Details Apparatus for variable gain amplifiers and mixers Apparatus for variable gain amplifiers and mixers

2008-03-18

2008-03-18

Nguyen, Khanh Van (Department: 2817)

Amplifiers

With semiconductor amplifying device

Including differential amplifier

C327S359000

Reexamination Certificate

active

07345541

ABSTRACT:
Novel uses of current-dividing multi-transistors (composite transistors) are described. The composite transistors can replace transistors in otherwise traditional circuits by making suitable design changes. Arrangements of these composite transistors in amplifiers and mixers allow easy selection of current and hence gain in circuits driven by them. In appropriate configurations, they allow the designer to dynamically select the current provided to successive stages. The invention may be used in any integrated circuit technology and assists designers in achieving effective and efficient designs.

REFERENCES:
patent: 4516081 (1985-05-01), Katakura
patent: 5185581 (1993-02-01), Brown
patent: 5933771 (1999-08-01), Tiller et al.
patent: 6710657 (2004-03-01), Yang
patent: 7102435 (2006-09-01), Bosch et al.

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