Title:
PHASE SYNCHRONIZATION CIRCUIT AND CONTROL SYSTEM
Document Type and Number:
WIPO Patent Application WO/2022/138025
Kind Code:
A1
Abstract:
In a first phase synchronization circuit (10A), a phase comparison unit (13) receives, as inputs, a detection signal and a driving signal of a first vibration system (20A), and outputs a signal indicating a phase difference between the inputted detection signal and the inputted driving signal. A loop filter (14) smoothes the signal that indicates the phase difference and that has been outputted from the phase comparison unit (13). A voltage control oscillation unit (15) outputs, as an output signal, a signal having a frequency increased in accordance with the magnitude of a signal smoothed by the loop filter (14). A phase shift unit (12) shifts the phase of the detection signal by an adjustable phase shift amount θ. A volume amplifier (16) amplifies the driving signal outputted from the voltage control oscillation unit (15) by an adjustable amplification rate, and outputs the amplified driving signal.
Inventors:
YAMAOKA KENJI (JP)
Application Number:
PCT/JP2021/044028
Publication Date:
June 30, 2022
Filing Date:
December 01, 2021
Export Citation:
Assignee:
I PEX INC (JP)
International Classes:
H03L7/08; G02B26/10
Foreign References:
| JP2012013529A | 2012-01-19 | |||
| JP2007158535A | 2007-06-21 | |||
| JP2018185286A | 2018-11-22 | |||
| JP2011118194A | 2011-06-16 | |||
| JPH09250930A | 1997-09-22 | |||
| US20190324263A1 | 2019-10-24 |
Attorney, Agent or Firm:
KIMURA Mitsuru (JP)
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