Amplifier with gain expansion stage

Details Amplifier with gain expansion stage Amplifier with gain expansion stage

2008-06-20

2011-10-11

Nguyen, Patricia (Department: 2817)

Amplifiers

Combined with automatic amplifier disabling switch means

C330S310000, C330S278000, C330S296000

Reexamination Certificate

active

08035443

ABSTRACT:
Techniques are disclosed for extending an amplifier's linear operating range by concatenating an amplifier exhibiting gain compression with a gain expansion stage. In an exemplary embodiment, a gain expansion stage incorporates a Class-B stage, a Class-AB stage, or a combination of the two. In an exemplary embodiment, both the gain compression stage and gain expansion stage are provided with a replica current biasing scheme to ensure stable biasing current over variations in temperature, process, and/or supply voltage. Further disclosed is an output voltage biasing scheme to set the DC output voltage to ensure maximum linear operating range.

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