Patent attributes
A variable gain amplifier circuit is disclosed. The variable gain amplifier circuit includes a first transistor, a second transistor, a third transistor, a fourth transistor, a first gain switching circuit, and a second gain switching circuit. The first and the second transistors are respectively coupled to the first and the second nodes for receiving a differential input signal pair. The third transistor is coupled between the first node and a third node. The fourth transistor is coupled between the second node and a fourth node. The first gain switching circuit is coupled between the first node and the third node and further cross-coupled to the fourth node. The second gain switching circuit is coupled between the second node and the fourth node and further cross-coupled to the third node.
