JPS5536749A - Rotation-angle sensor - Google Patents

Rotation-angle sensor

Info

Publication number
JPS5536749A
JPS5536749A JP10974778A JP10974778A JPS5536749A JP S5536749 A JPS5536749 A JP S5536749A JP 10974778 A JP10974778 A JP 10974778A JP 10974778 A JP10974778 A JP 10974778A JP S5536749 A JPS5536749 A JP S5536749A
Authority
JP
Japan
Prior art keywords
voltage
integrated
com5
charged
comparator
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.)
Granted
Application number
JP10974778A
Other languages
Japanese (ja)
Other versions
JPS5853285B2 (en
Inventor
Kazuhiko Kawakami
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 JP10974778A priority Critical patent/JPS5853285B2/en
Publication of JPS5536749A publication Critical patent/JPS5536749A/en
Publication of JPS5853285B2 publication Critical patent/JPS5853285B2/en
Expired legal-status Critical Current

Links

Landscapes

  • Electrical Control Of Ignition Timing (AREA)
  • Transmission And Conversion Of Sensor Element Output (AREA)

Abstract

PURPOSE: To make the generation of a reference signal possible even though an integrated voltage is low by varying a sensing level at a specified ratio corresponding to the peak value of the integrated voltage.
CONSTITUTION: In a reference signal circuit for sensing the rotational displacement of a disk 1, a pickup coil 3b generates a voltage Vs which has 3 positive and negative peaks per 1 rotation of the disk and containing a noise voltage. The voltage Vs is compared with a voltage Vcc from a capacitor C1 in a comparator COM3. C2 is charged by a voltage which is approximately equivalent to the peak value of the comparator voltage, i.e. integrated output voltage, by the emitter current of a transitor Q2. When C2 is not charged, a voltage determined by a division ratio of resistors R25 and R26 is applied to a comparator COM5, and when C2 is charged, a voltage determined by a division ratio of resistors R25 and R26 is likewise applied to COM5. The value obtained by dividing said integrated peak value by the division ratio of R25 and R26 becomes a sensing level of COM5, thereby the sensing level is set at a low level corresponding to the integrated voltage peak.
COPYRIGHT: (C)1980,JPO&Japio
JP10974778A 1978-09-08 1978-09-08 Rotation angle detection device Expired JPS5853285B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP10974778A JPS5853285B2 (en) 1978-09-08 1978-09-08 Rotation angle detection device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP10974778A JPS5853285B2 (en) 1978-09-08 1978-09-08 Rotation angle detection device

Publications (2)

Publication Number Publication Date
JPS5536749A true JPS5536749A (en) 1980-03-14
JPS5853285B2 JPS5853285B2 (en) 1983-11-28

Family

ID=14518216

Family Applications (1)

Application Number Title Priority Date Filing Date
JP10974778A Expired JPS5853285B2 (en) 1978-09-08 1978-09-08 Rotation angle detection device

Country Status (1)

Country Link
JP (1) JPS5853285B2 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5714715A (en) * 1980-07-02 1982-01-26 Diesel Kiki Co Ltd Generator for reference position signal

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5714715A (en) * 1980-07-02 1982-01-26 Diesel Kiki Co Ltd Generator for reference position signal

Also Published As

Publication number Publication date
JPS5853285B2 (en) 1983-11-28

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