Amplifier circuit
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- MEDIATEK INC
- Publication Date
- 2014-01-29
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Abstract
Description
technical field
[0001] The present invention relates to an amplifier circuit design, in particular to an amplifier circuit design that strengthens the power supply rejection ratio at the output stage. Background technique
[0002] Amplifiers are generally used in a variety of applications, including audio signal processing, video signal processing, communication systems, control systems, satellite systems, etc. In the low power amplifier design, the Total Harmonic Distortion (THD) of the amplifier usually performs poorly in the high frequency region due to insufficient loop gain. In particular, when the output stage of a low power amplifier is disturbed by power supply noise, the noise generated by the power supply will eventually exist in the output signal, resulting in signal distortion.
[0003] Therefore, various amplifier circuit designs that enhance the Power Supply Rejection Ratio (PSRR) at the output stage are required. Contents of the invention
[0004] In view ...