Title:
SELF-EXCITED OSCILLATION SUPPRESSION DEVICE AND METHOD FOR POWER AMPLIFIER CIRCUIT
Document Type and Number:
WIPO Patent Application WO/2021/139153
Kind Code:
A1
Abstract:
A self-excited oscillation suppression device and method for a power amplifier circuit. The power amplifier circuit comprises a field effect transistor (12) and a feedback loop (11). Said device comprises: a first compensation circuit (13) connected across a drain electrode and a gate electrode of the field effect transistor (12); and a second compensation circuit (14) connected in parallel to a feedback resistor in the feedback loop (11). The present invention can solve the problem of self-excited oscillation caused by deep negative feedback in existing power amplifier circuits. Because the first compensation circuit (13) can move forward the entire open loop gain curve, and the second compensation circuit (14) can accelerate the closing speed of the feedback gain curve and the open loop gain curve, the open loop gain curve and the feedback gain curve are closed before self-excited oscillation occurs, thereby suppressing the self-excited oscillation of the power amplifier circuit, and improving the stability of the power amplifier circuit.
Inventors:
ZHONG BOWEN (CN)
ZHANG DAQIAN (CN)
ZHANG DAQIAN (CN)
Application Number:
PCT/CN2020/108356
Publication Date:
July 15, 2021
Filing Date:
August 11, 2020
Export Citation:
Assignee:
UNIV SOOCHOW (CN)
International Classes:
H03F1/34
Foreign References:
| CN111130467A | 2020-05-08 | |||
| CN110289818A | 2019-09-27 | |||
| CN205039782U | 2016-02-17 | |||
| CN110233600A | 2019-09-13 | |||
| CN205666802U | 2016-10-26 | |||
| US20100201449A1 | 2010-08-12 | |||
| US20070018621A1 | 2007-01-25 |
Attorney, Agent or Firm:
SUZHOU JINHE INTELLECTUAL PROPERTY AGENCY (SPECIAL GENERAL PARTNERSHIP) (CN)
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