Title:
COMBINED OPERATIONAL AMPLIFIER CIRCUIT, CHIP AND SIGNAL PROCESSING APPARATUS
Document Type and Number:
WIPO Patent Application WO/2024/016519
Kind Code:
A1
Abstract:
The present application relates to a combined operational amplifier circuit, a chip and a signal processing apparatus. The combined operational amplifier circuit comprises: a first operational amplifier, configured, when an in-phase input terminal and a reverse-phase input terminal of the first operational amplifier have the same electrical properties, to generate a signal to be calibrated; a second operational amplifier, connected to an output terminal of the first operational amplifier; and a calibration circuit, comprising: a judgment branch configured for judging an amplitude and a reference value of the signal to be calibrated generated by the first operational amplifier, and generating a judgment result; and a calibration branch, configured for generating a calibration signal according to the judgment result outputted by the judgment branch, and providing the calibration signal as feedback to the first operational amplifier. Utilizing the technical scheme of the present application allows for improving the precision and bandwidth of the combined operational amplifier circuit.
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Inventors:
YAN BO (CN)
FANG CHAOMIN (CN)
LI JIANWEI (CN)
WANG YUE (CN)
FANG CHAOMIN (CN)
LI JIANWEI (CN)
WANG YUE (CN)
Application Number:
PCT/CN2022/130231
Publication Date:
January 25, 2024
Filing Date:
November 07, 2022
Export Citation:
Assignee:
RIGOL TECH CO LTD (CN)
International Classes:
H03F1/30; H03F1/42; H03F3/08; H03F3/68
Foreign References:
| CN115118230A | 2022-09-27 | |||
| CN106026953A | 2016-10-12 | |||
| CN110277966A | 2019-09-24 | |||
| CN108718196A | 2018-10-30 | |||
| CN102025326A | 2011-04-20 | |||
| CN114079462A | 2022-02-22 |
Attorney, Agent or Firm:
CHINA FARFIR INTELLECTUAL PROPERTY AGENCY LTD. (CN)
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