Patent ID: 11901870
Assignee: REALTEK SEMICONDUCTOR CORPORATION
Field: Basic communication processes (Electrical engineering)
Classification: CPC H | IPC H

Claim 16:
17. The amplifier of claim 16, wherein the first current source further comprises a third current mirror, an output terminal of the third current mirror is coupled to the second terminal of the first amplifying transistor through a first switch element, the third current mirror is configured to provide a third current according to the first reference current, the second current source further comprises a fourth current mirror, an output terminal of the fourth current mirror is coupled to the second terminal of the second amplifying transistor through a second switch element, the fourth current mirror is configured to provide a fourth current according to the second reference current;
the gain adjusting circuit is coupled to the first switch element and the second switch element and is configured to conduct the output terminal of the third current mirror and the second terminal of the first amplifying transistor and conduct the output terminal of the fourth current mirror and the second terminal of the second amplifying transistor by outputting a plurality of second control signals to the first switch element and the second switch element, and the first current, the second current, the third current and the fourth current are provided simultaneously to increase the first bias current provided by the first current source and the second bias current provided by the second current source so as to increase the real gain of the amplifier circuit.