Title:
PHASE-LOCKED LOOP FREQUENCY SYNTHESIZER AND CONTROL METHOD THEREFOR
Document Type and Number:
WIPO Patent Application WO/2022/247215
Kind Code:
A1
Abstract:
A phase-locked loop frequency synthesizer and a control method therefor, wherein the phase-locked loop frequency synthesizer comprises: a voltage-controlled oscillator used for generating a microwave signal; a directional coupler used for dividing the microwave signal into a main signal and a coupling signal, and transmitting the main signal to a transmitter of a paramagnetic resonance spectrometer to enter a resonant cavity; an automatic frequency control unit connected to the resonant cavity, and used for generating a first oscillation signal and a second oscillation signal, generating a frequency deviation signal and generating a frequency setting signal according to the frequency deviation signal; and a phase-locked loop control unit separately connected to the directional coupler, the voltage-controlled oscillator and the automatic frequency control unit, and used for generating a low-phase noise signal and controlling the voltage-controlled oscillator.
Inventors:
SHI ZHIFU (CN)
ZHANG WEI (CN)
ZHANG WEI (CN)
Application Number:
PCT/CN2021/135775
Publication Date:
December 01, 2022
Filing Date:
December 06, 2021
Export Citation:
Assignee:
CHINAINSTRU & QUANTUMTECH HEFEI CO LTD (CN)
International Classes:
H03L7/18; G01R33/60
Foreign References:
| CN113437969A | 2021-09-24 | |||
| CN2746659Y | 2005-12-14 | |||
| CN202168070U | 2012-03-14 | |||
| CN105021885A | 2015-11-04 | |||
| US6255912B1 | 2001-07-03 |
Attorney, Agent or Firm:
TSINGYIHUA INTELLECTUAL PROPERTY LLC (CN)
Download PDF: