Title:
CONTROL DEVICE FOR DIRECT-CURRENT OUTPUT POTENTIAL OF POWER AMPLIFIER
Document Type and Number:
WIPO Patent Application WO/2017/143623
Kind Code:
A1
Abstract:
A control device for a direct-current output potential of a power amplifier. The control device is implemented on the basis of an active temperature control bias circuit. In the active temperature control bias circuit, a direct-current output potential deviation detection circuit detects a direct-current output potential deviation value of the power amplifier, and a temperature control circuit correspondingly heats or cools a voltage regulating circuit according to the detected direct-current output potential deviation value. The voltage regulating circuit correspondingly regulates, according to the heating or cooling of the temperature control circuit, a bias voltage of a device generating a temperature drift in the power amplifier. Accordingly, the bias voltage can be regulated by means of active temperature control, so as to achieve the purpose of controlling the direct-current output potential, self-excitation and transient intermodulation distortion caused by negative feedback in the prior art are avoided, and the performance of an amplifier circuit is improved.
Inventors:
LIU DENNIS (CN)
Application Number:
PCT/CN2016/075249
Publication Date:
August 31, 2017
Filing Date:
March 01, 2016
Export Citation:
Assignee:
GUANGZHOU TIME ART AUDIO TECH CO LTD (CN)
International Classes:
H03F1/30
Foreign References:
| CN204155166U | 2015-02-11 | |||
| CN202798671U | 2013-03-13 | |||
| CN201904759U | 2011-07-20 | |||
| CN102820883A | 2012-12-12 | |||
| JPH0846438A | 1996-02-16 | |||
| CN205566228U | 2016-09-07 |
Attorney, Agent or Firm:
BEIJING YINGKE LAW FIRM (CN)
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