JPS5654573A - Signal detector using differential transformer type magnetic head - Google Patents

Signal detector using differential transformer type magnetic head

Info

Publication number
JPS5654573A
JPS5654573A JP13049879A JP13049879A JPS5654573A JP S5654573 A JPS5654573 A JP S5654573A JP 13049879 A JP13049879 A JP 13049879A JP 13049879 A JP13049879 A JP 13049879A JP S5654573 A JPS5654573 A JP S5654573A
Authority
JP
Japan
Prior art keywords
magnetic head
differential
type magnetic
transformer type
differential transformer
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
JP13049879A
Other languages
Japanese (ja)
Other versions
JPS6113638B2 (en
Inventor
Hiroyuki Nishimura
Kinichi Kidera
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.)
Omron Corp
Original Assignee
Omron Tateisi Electronics Co
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 Omron Tateisi Electronics Co filed Critical Omron Tateisi Electronics Co
Priority to JP13049879A priority Critical patent/JPS5654573A/en
Publication of JPS5654573A publication Critical patent/JPS5654573A/en
Publication of JPS6113638B2 publication Critical patent/JPS6113638B2/ja
Granted legal-status Critical Current

Links

Landscapes

  • Measuring Magnetic Variables (AREA)
  • Character Input (AREA)
  • Recording Or Reproducing By Magnetic Means (AREA)

Abstract

PURPOSE: To make it possible to detect a signal over the whole range of a differential output characteristic curve, by detecting both the oscillating fluctuations and phase changes of the differential output of a differential transformer type magnetic head.
CONSTITUTION: Sine wave A from oscillator 11 flows through excited coil 6 of differential transformer type magnetic head 1 by way of amplifier 12, and voltages B and C induced across secondary coils 7 and 8 as printed matter 10 is carried are processed by differential amplifer 13 to apply difference signal D to multiplier 15. Sine wave A from oscillator 11 is transformed by square wave generating circuit 14 into 90° phase leading square wave E, which is supplied to multiplier 15, whose multiplication output F has its high frequency component, including signal A, removed through LPF16 to obtain detection signal G. Consequently, even when magnetic head 1 wears until its section area changes, it can detect signals over the whole range of the characteristic curve as it is.
COPYRIGHT: (C)1981,JPO&Japio
JP13049879A 1979-10-09 1979-10-09 Signal detector using differential transformer type magnetic head Granted JPS5654573A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP13049879A JPS5654573A (en) 1979-10-09 1979-10-09 Signal detector using differential transformer type magnetic head

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP13049879A JPS5654573A (en) 1979-10-09 1979-10-09 Signal detector using differential transformer type magnetic head

Publications (2)

Publication Number Publication Date
JPS5654573A true JPS5654573A (en) 1981-05-14
JPS6113638B2 JPS6113638B2 (en) 1986-04-14

Family

ID=15035699

Family Applications (1)

Application Number Title Priority Date Filing Date
JP13049879A Granted JPS5654573A (en) 1979-10-09 1979-10-09 Signal detector using differential transformer type magnetic head

Country Status (1)

Country Link
JP (1) JPS5654573A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5858569A (en) * 1981-10-02 1983-04-07 Fuji Xerox Co Ltd Toner ratio detecting device for electronic copying machine
EP0565988A2 (en) * 1992-04-11 1993-10-20 BASF Aktiengesellschaft Process and device for detecting and decoding soft magnetic ink print features

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0437468Y2 (en) * 1986-02-12 1992-09-03

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5858569A (en) * 1981-10-02 1983-04-07 Fuji Xerox Co Ltd Toner ratio detecting device for electronic copying machine
EP0565988A2 (en) * 1992-04-11 1993-10-20 BASF Aktiengesellschaft Process and device for detecting and decoding soft magnetic ink print features

Also Published As

Publication number Publication date
JPS6113638B2 (en) 1986-04-14

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