Patent ID: 9634616
Date: 2017-04-25
CPC Classifications: H03F

Claim:
1. A single-end amplifier, comprising: a noise cancelling circuit, coupled to a power supply, configured to receive a power signal and to generate an initial signal; an amplifying circuit, having a first end and a second end, the first end coupled to the noise cancelling circuit, the amplifying circuit configured to receive the initial signal and to amplify the initial signal to generate a first signal at the second end; and a first transmitting circuit, coupled between the power supply and the second end of the amplifying circuit, configured to receive the power signal and to generate a second signal at the second end of the amplifying circuit; wherein the noise cancelling circuit comprises a first capacitor and a first choke coil; the first capacitor has a first end coupled to the power signal, and a second end coupled to the first end of the amplifying circuit and grounded via the first choke coil; the first signal and the second signal are superimposed at the second end of the amplifying circuit and outputted to cancel ripples and noises in the power signal.