Patent ID: 9660595
Date: 2017-05-23
CPC Classifications: H03F,H03G

Claim:
1. A linear amplifier using multi-amplifying stage in cascade, comprising: a first amplifier and a second amplifier; a bias voltage generator comprising a first bias voltage and a second bias voltage, and the first bias voltage being applied to a gate terminal of the first amplifier, and the second bias voltage being applied to a gate terminal of the second amplifier, the second bias voltage greater than the first bias voltage, wherein the first amplifier and the second amplifier output a nonlinear gain characteristic, respectively in a region of arbitrary output power, and in response to detection of the output power increasing in the region of the arbitrary output power, a gain of the first amplifier increases, while a gain of the second amplifier decreases, and wherein the sum of the nonlinear gain of the first amplifier and the nonlinear gain of the second amplifier represents a linear gain characteristic corresponding to the region of arbitrary output power.