A low additional phase shift variable gain amplifier

Abstract

The application discloses a low additional phase shift variable gain amplifier and belongs to the technical field of variable gain amplifier design, comprising a first GSG electrode voltage conversion module, a common-source cross-coupled VGA module, a first compensation transistor capacitor Ccomp1, a second compensation transistor capacitor Ccomp2 and a second GSG electrode voltage conversion module; the first GSG voltage conversion module is connected with the common-source cross-coupled VGA module; the first compensation transistor capacitor Ccomp1 and the second compensation transistor capacitor Ccomp2 are both connected with the common-source cross-coupled VGA module; the common-source cross-coupled VGA module is connected with the second GSG electrode voltage conversion module; the application solves the problem that it is difficult to maintain the additional phase shift at a very low level, and the capacitor compensation cross-coupled VGA based on the application realizes a high dynamic range and a low additional phase shift.

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