JPS55122211A - Bias adjustment unit of magnetic recorder - Google Patents

Bias adjustment unit of magnetic recorder

Info

Publication number
JPS55122211A
JPS55122211A JP3093179A JP3093179A JPS55122211A JP S55122211 A JPS55122211 A JP S55122211A JP 3093179 A JP3093179 A JP 3093179A JP 3093179 A JP3093179 A JP 3093179A JP S55122211 A JPS55122211 A JP S55122211A
Authority
JP
Japan
Prior art keywords
bias current
current supply
bias
tapes
set terminal
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
JP3093179A
Other languages
Japanese (ja)
Other versions
JPS611803B2 (en
Inventor
Hiroshi Osakabe
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.)
Teac Corp
Original Assignee
Teac 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 Teac Corp filed Critical Teac Corp
Priority to JP3093179A priority Critical patent/JPS55122211A/en
Publication of JPS55122211A publication Critical patent/JPS55122211A/en
Publication of JPS611803B2 publication Critical patent/JPS611803B2/ja
Granted legal-status Critical Current

Links

Abstract

PURPOSE: To prevent noise from mixing into a bias current supply circuit to make it possible to change the bias current considerably, by changing the set of the bias current by combination of the power source voltage and the output voltage of a bias oscillator.
CONSTITUTION: The power source voltage of terminal 2 is supplied to bias oscillator 1 through transistor TR3 for voltage adjustment and is supplied to triode AC switch 14 of the bias output voltage adjustment circuit through switching TR17. Switch 4 to control the base voltage of TR3 and TR17 is switched among small bias current supply set terminal 5 for ordinary tapes, large bias current supply set terminal 6 for FeCo tapes, comparatively large bias current supply set terminal 7 for CrO2 tapes, and very large bias current supply set terminal 8 for alloy tapes, and a prescribed bias current is given to heads 10 and 12.
COPYRIGHT: (C)1980,JPO&Japio
JP3093179A 1979-03-15 1979-03-15 Bias adjustment unit of magnetic recorder Granted JPS55122211A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP3093179A JPS55122211A (en) 1979-03-15 1979-03-15 Bias adjustment unit of magnetic recorder

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP3093179A JPS55122211A (en) 1979-03-15 1979-03-15 Bias adjustment unit of magnetic recorder

Publications (2)

Publication Number Publication Date
JPS55122211A true JPS55122211A (en) 1980-09-19
JPS611803B2 JPS611803B2 (en) 1986-01-20

Family

ID=12317417

Family Applications (1)

Application Number Title Priority Date Filing Date
JP3093179A Granted JPS55122211A (en) 1979-03-15 1979-03-15 Bias adjustment unit of magnetic recorder

Country Status (1)

Country Link
JP (1) JPS55122211A (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6388805A (en) * 1986-10-01 1988-04-19 株式会社村田製作所 Variable resistor

Also Published As

Publication number Publication date
JPS611803B2 (en) 1986-01-20

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