Patent ID: 7576608
Filing Date: 2009-08-18
Classification: H03F,H03M

Abstract:
1. An amplifier circuit with a voltage interpolation function, the amplifier circuit comprising: an N-type differential pair having a first transconductance value, the N-type differential pair comprising a first differential input terminal coupled to a first voltage and a second differential input terminal coupled to a voltage output terminal; and a P-type differential pair having a second transconductance value, the P-type differential pair comprising a first differential input terminal coupled to a second voltage and a second differential input terminal coupled to the voltage output terminal; wherein the N-type differential pair and the P-type differential pair are further coupled to the voltage output terminal through an output stage, and an output voltage of the voltage output terminal is an interpolation result of the first voltage and the second voltage weighted by the first transconductance value and the second transconductance value.