JPS5692606A - Frequency discriminating circuit - Google Patents

Frequency discriminating circuit

Info

Publication number
JPS5692606A
JPS5692606A JP16836879A JP16836879A JPS5692606A JP S5692606 A JPS5692606 A JP S5692606A JP 16836879 A JP16836879 A JP 16836879A JP 16836879 A JP16836879 A JP 16836879A JP S5692606 A JPS5692606 A JP S5692606A
Authority
JP
Japan
Prior art keywords
produced
specified value
change
vicinity
subject
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP16836879A
Other languages
Japanese (ja)
Inventor
Takashi Kouhata
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Hitachi Ltd
Original Assignee
Hitachi Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Hitachi Ltd filed Critical Hitachi Ltd
Priority to JP16836879A priority Critical patent/JPS5692606A/en
Publication of JPS5692606A publication Critical patent/JPS5692606A/en
Pending legal-status Critical Current

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  • Control Of Velocity Or Acceleration (AREA)
  • Control Of Electric Motors In General (AREA)

Abstract

PURPOSE: To enable to perform accurate frequency discriminating operation at all times without being subject to the change in ambient temperatures and power supply voltage, by obtaining the timing required for frequency discrimination at the counter for clock pulses.
CONSTITUTION: A pulse generator 110, up-down counter 120, data latch circuit 130, and D/A converter 140 are provided. The period of an input pulse signal A is judged through the count operation of clock pulses CP. If it is near the specified value, an error voltage E corresponding to the change is produced, if it exceeds the vicinity of the specified value, the error voltage E of a minimum saturation value (e.g., 0) is produced, and if it does not reach the vicinity of the specified value, the error signal E of maximum saturation value is produced respectively. Thus, without being subject to the effect due to temperature change and power supply voltage variance, always accurate frequency discrimination is enabled, and the presence of the input pulse signal having a plurality of different periods to the same discrimination output can be avoided.
COPYRIGHT: (C)1981,JPO&Japio
JP16836879A 1979-12-26 1979-12-26 Frequency discriminating circuit Pending JPS5692606A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP16836879A JPS5692606A (en) 1979-12-26 1979-12-26 Frequency discriminating circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP16836879A JPS5692606A (en) 1979-12-26 1979-12-26 Frequency discriminating circuit

Publications (1)

Publication Number Publication Date
JPS5692606A true JPS5692606A (en) 1981-07-27

Family

ID=15866788

Family Applications (1)

Application Number Title Priority Date Filing Date
JP16836879A Pending JPS5692606A (en) 1979-12-26 1979-12-26 Frequency discriminating circuit

Country Status (1)

Country Link
JP (1) JPS5692606A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS625421A (en) * 1985-07-01 1987-01-12 Sony Corp Digital servo device
JPS62277082A (en) * 1986-05-23 1987-12-01 Tokyo Electric Co Ltd Motor speed controller
JPH0365087A (en) * 1989-07-31 1991-03-20 Gold Star Co Ltd Speed control circuit of servo motor

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS625421A (en) * 1985-07-01 1987-01-12 Sony Corp Digital servo device
JPS62277082A (en) * 1986-05-23 1987-12-01 Tokyo Electric Co Ltd Motor speed controller
JPH0365087A (en) * 1989-07-31 1991-03-20 Gold Star Co Ltd Speed control circuit of servo motor

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