Gain control for parallel-arranged differential pairs

Details Gain control for parallel-arranged differential pairs Gain control for parallel-arranged differential pairs

1997-05-09

1998-11-17

Mullins, James B.

Amplifiers

With semiconductor amplifying device

Including differential amplifier

330307, 4552511, H03G 330

Patent

active

058381988

ABSTRACT:
In a gain control circuit (GCC), a plurality of parallel-arranged differential pairs (DP1,DP2 . . . DPN) is unbalanced as a function of a gain control signal (Vagc). Furthermore, the gain of individual differential pairs (DP1,DP2 . . . DPN) is reduced when the unbalance is increased, and vice versa. Accordingly, a favorable performance in terms of noise and distortion can be obtained.

REFERENCES:
patent: 4864248 (1989-09-01), Jansen
patent: 5355534 (1994-10-01), Kimura
patent: 5742203 (1998-04-01), Van De Plassche et al.

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