Amplifiers and transceiver devices using the same

摘要

An amplifier is provided. The amplifier includes a pair of first input transistors, a first load, and a first canceling circuit. The pair of first input transistors is coupled between a pair of first differential nodes and a reference voltage source, for receiving a pair of input signals. The first load is coupled to the pair of first differential nodes and a pair of differential output terminals of the amplifier. The first canceling circuit is coupled between the first differential nodes. The canceling circuit is capable of balancing voltages, respectively, at the first differential nodes when the amplifier is turned off.

主权项

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.