JPS5655876A - Magnetic-field detector - Google Patents

Magnetic-field detector

Info

Publication number
JPS5655876A
JPS5655876A JP13261679A JP13261679A JPS5655876A JP S5655876 A JPS5655876 A JP S5655876A JP 13261679 A JP13261679 A JP 13261679A JP 13261679 A JP13261679 A JP 13261679A JP S5655876 A JPS5655876 A JP S5655876A
Authority
JP
Japan
Prior art keywords
circuit
magnetic
thyristor
constitution
turned
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
JP13261679A
Other languages
Japanese (ja)
Inventor
Yuji Fukushima
Junichi Goto
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.)
NEC Corp
Original Assignee
NEC Corp
Nippon Electric Co 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 NEC Corp, Nippon Electric Co Ltd filed Critical NEC Corp
Priority to JP13261679A priority Critical patent/JPS5655876A/en
Publication of JPS5655876A publication Critical patent/JPS5655876A/en
Pending legal-status Critical Current

Links

Landscapes

  • Measuring Magnetic Variables (AREA)

Abstract

PURPOSE: To enable employment of a two-core cord and make the device substantially free from noises by a method wherein a feed wire is short-circuit by an open-and-close element, such as a thyristor, which operates corresponding to a magnetic-field detection pulse and thereby the connection between the detection circuit and an outside power source is controlled.
CONSTITUTION: When a rotary magnetic-field and the like is detected by a bridge circuit formed of magnetic resistance effect elements 10 and 10' and bias resistances 11 and 11', a pulse is outputted from the operational amplifier 2 of a waveformshaping circuit. Then, a thyristor 12 in parallel to the amplifier 2 is placed in the state of continuity and the receiving terminals 13 and 13' of a magnetic-field detector 8 are short-circuited, whereby the pulse s received by the receiving circuit 4 of a receiving device 9. Then, a switch 14 is turned off through the intermediary of the circuit 4 and accordingly, the connection between the outside power source 5 and the detector 8 is broken. By this constitution, when the thyristor 12 is turned off, the switch 14 is turned on. By this shared constitution of the power line and the signal line, the detector and the receiving device can be connected with each other by the two-core cord without using a three-core cord. In addition, since the detection outut signal is a loop signal which short-circuit the feed wire, the current which flows turns large, whereby the device is made substantially free from noises.
COPYRIGHT: (C)1981,JPO&Japio
JP13261679A 1979-10-15 1979-10-15 Magnetic-field detector Pending JPS5655876A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP13261679A JPS5655876A (en) 1979-10-15 1979-10-15 Magnetic-field detector

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP13261679A JPS5655876A (en) 1979-10-15 1979-10-15 Magnetic-field detector

Publications (1)

Publication Number Publication Date
JPS5655876A true JPS5655876A (en) 1981-05-16

Family

ID=15085487

Family Applications (1)

Application Number Title Priority Date Filing Date
JP13261679A Pending JPS5655876A (en) 1979-10-15 1979-10-15 Magnetic-field detector

Country Status (1)

Country Link
JP (1) JPS5655876A (en)

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