Title:
CALIBRATION CIRCUIT
Document Type and Number:
WIPO Patent Application WO/2023/135919
Kind Code:
A1
Abstract:
The purpose of the present invention is to suppress an increase in power consumed during steady-state operation, while also preventing oscillation pausing during calibration of an LC oscillator. This calibration circuit comprises a reference voltage generation unit, a voltage comparison unit, and an amplitude adjustment unit. The reference voltage generation unit generates a plurality of different reference voltages. The voltage comparison unit compares the plurality of different reference voltages and a detected value of an oscillation amplitude that was detected using an oscillation signal from the LC oscillator, on a side having the same polarity of the oscillation amplitude. The amplitude adjustment unit adjusts the oscillation amplitude on the basis of comparison results from the voltage comparison unit. The calibration circuit may comprise a frequency adjustment unit that adjusts the oscillation frequency of the LC oscillator.
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Inventors:
TAKANO HIDEYUKI (JP)
Application Number:
PCT/JP2022/042342
Publication Date:
July 20, 2023
Filing Date:
November 15, 2022
Export Citation:
Assignee:
SONY SEMICONDUCTOR SOLUTIONS CORP (JP)
International Classes:
H03B5/12
Domestic Patent References:
| WO2010055619A1 | 2010-05-20 |
Foreign References:
| JP2001345696A | 2001-12-14 | |||
| JP2008219432A | 2008-09-18 | |||
| JP2016181781A | 2016-10-13 | |||
| US20140266487A1 | 2014-09-18 | |||
| CN108199710A | 2018-06-22 |
Attorney, Agent or Firm:
MARUSHIMA, Toshikazu (JP)
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