Patent ID: 8792540
Filing Date: 2014-07-29
Classification: H03F,H04B

Abstract:
1. An amplifier, comprising: a pair of first input transistors, coupled between a pair of first differential nodes and a reference voltage source, for receiving a pair of input signals; a first load coupled to the pair of first differential nodes and a pair of differential output terminals of the amplifier; and a first canceling circuit, coupled between the first differential nodes, for balancing voltages, respectively, at the first differential nodes when the amplifier is turned off, wherein the first canceling circuit comprises: a first transistor having a first electrode directly connected to one of the first differential nodes, a second electrode directly connected to the other of the first differential nodes, and a control electrode receiving a first control signal, wherein when the amplifier is turned off, the first transistor is turned on by the first control signal to balance the voltages, respectively, at the first differential nodes.