Low-voltage high dynamic range variable-gain amplifier

Details Low-voltage high dynamic range variable-gain amplifier Low-voltage high dynamic range variable-gain amplifier

2005-12-06

2005-12-06

Mottola, Steven J. (Department: 2817)

Amplifiers

With semiconductor amplifying device

Including differential amplifier

C330S283000

Reexamination Certificate

active

06972624

ABSTRACT:
Circuits and methods for providing a variable gain while powered from a low-voltage supply. In a specific embodiment, an input signal is converted to a current by an emitter-degenerated pair. A portion of the input current is discarded, while the remainder is variably steered between a shunt stage or an AC ground such as VCC. The output of the shunt stage is buffered by a high speed output, the bandwidth of which is increased by feed-forward capacitors. This arrangement may be optionally repeated for additional gain.

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