Title:
時計用モータの状態検出回路、時計、および時計用モータの状態検出方法
Document Type and Number:
Japanese Patent JP7036629
Kind Code:
B2
Abstract:
To provide a circuit for detecting the state of a motor for timepieces, a timepiece, and a method for detecting the state of a motor for timepieces, with which it is possible to suppress an increase in the current consumption of a threshold voltage that serves as a point of reference in detecting the rotation state of a motor for timepieces.SOLUTION: A circuit 10 for detecting the state of a motor for timepieces comprises: a comparison circuit 11 for comparing voltages inputted to first input units IN1, IN2 and a second input unit IN3; a detection circuit 12 for inputting, in a state detection period, an induced electromotive voltage to the first input units IN1, IN2 that is generated in a drive pulse output period by rotation of a rotor that a motor 30 driven by a drive pulse has, the state detection period being a period after the drive pulse output period in which the rotation state of the motor 30 is detected; and a holding circuit 13 for holding a threshold voltage in the state detection period that is set in the drive pulse output period on the basis of a voltage from a power supply circuit 15 that generates the voltage and inputted to the second input unit IN3.SELECTED DRAWING: Figure 2
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| JPS55112587 | ELECTRONIC WATCH |
Inventors:
Kato Kazuo
Application Number:
JP2018039726A
Publication Date:
March 15, 2022
Filing Date:
March 06, 2018
Export Citation:
Assignee:
Seiko Instruments Inc.
International Classes:
G04C3/14; H02P8/02
Domestic Patent References:
| JP2014219231A | ||||
| JP5477169A | ||||
| JP5477162A | ||||
| JP2001307269A | ||||
| JP2009156787A | ||||
| JP201523644A |
Attorney, Agent or Firm:
田▲崎▼ 聡
Suzuki Shingo
Kazuzumi Nishizawa
Suzuki Shingo
Kazuzumi Nishizawa
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