JPS6451705A - Isolation amplifier - Google Patents

Isolation amplifier

Info

Publication number
JPS6451705A
JPS6451705A JP62208775A JP20877587A JPS6451705A JP S6451705 A JPS6451705 A JP S6451705A JP 62208775 A JP62208775 A JP 62208775A JP 20877587 A JP20877587 A JP 20877587A JP S6451705 A JPS6451705 A JP S6451705A
Authority
JP
Japan
Prior art keywords
operational amplifier
noninverting input
input
resistor
mode noise
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
JP62208775A
Other languages
Japanese (ja)
Other versions
JPH0687528B2 (en
Inventor
Kimito Kobayashi
Susumu Niinuma
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.)
Pioneer Corp
Original Assignee
Pioneer Electronic Corp
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 Pioneer Electronic Corp filed Critical Pioneer Electronic Corp
Priority to JP62208775A priority Critical patent/JPH0687528B2/en
Publication of JPS6451705A publication Critical patent/JPS6451705A/en
Publication of JPH0687528B2 publication Critical patent/JPH0687528B2/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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  • Amplifiers (AREA)

Abstract

PURPOSE:To prevent deterioration in the isolation characteristic by using part of a bias circuit impressing a bias voltage to a noninverting input of an operational amplifier and a detection circuit detecting the common mode noise in common. CONSTITUTION:Part of the bias circuit impressing a bias voltage to a noninverting input of an operational amplifier OP and the detection circuit detecting the common mode noise are used in common. That is, A resistor R3 and a capacitor C1 connected in series between the noninverting input of the operational amplifier OP and the input ground system A and a resistor R7 and a capacitor C3 connected in series between the noninverting input of the operational amplifier OP and the output grounding system B detect the common mode noise generated because of different grounding systems A, B between the devices. Since only the resistor R3 exists in terms of AC when viewing the noninverting input of the operational amplifier OP and the input grounding system A, the deterioration in the isolation characteristic is prevented.
JP62208775A 1987-08-22 1987-08-22 Isolation amplifier Expired - Lifetime JPH0687528B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP62208775A JPH0687528B2 (en) 1987-08-22 1987-08-22 Isolation amplifier

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP62208775A JPH0687528B2 (en) 1987-08-22 1987-08-22 Isolation amplifier

Publications (2)

Publication Number Publication Date
JPS6451705A true JPS6451705A (en) 1989-02-28
JPH0687528B2 JPH0687528B2 (en) 1994-11-02

Family

ID=16561889

Family Applications (1)

Application Number Title Priority Date Filing Date
JP62208775A Expired - Lifetime JPH0687528B2 (en) 1987-08-22 1987-08-22 Isolation amplifier

Country Status (1)

Country Link
JP (1) JPH0687528B2 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5347572A (en) * 1990-09-06 1994-09-13 Teletron Ltd. Telephone line monitoring apparatus and method

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5347572A (en) * 1990-09-06 1994-09-13 Teletron Ltd. Telephone line monitoring apparatus and method
US5553116A (en) * 1990-09-06 1996-09-03 Teletron Ltd. Telephone line monitoring apparatus and method

Also Published As

Publication number Publication date
JPH0687528B2 (en) 1994-11-02

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