JPS5737708A - Electronic switching device - Google Patents

Electronic switching device

Info

Publication number
JPS5737708A
JPS5737708A JP11421880A JP11421880A JPS5737708A JP S5737708 A JPS5737708 A JP S5737708A JP 11421880 A JP11421880 A JP 11421880A JP 11421880 A JP11421880 A JP 11421880A JP S5737708 A JPS5737708 A JP S5737708A
Authority
JP
Japan
Prior art keywords
turns
switching
rotary
amplifying
fet
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
JP11421880A
Other languages
Japanese (ja)
Inventor
Takashi Tanaka
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.)
Toshiba Corp
Original Assignee
Toshiba Corp
Tokyo Shibaura 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 Toshiba Corp, Tokyo Shibaura Electric Co Ltd filed Critical Toshiba Corp
Priority to JP11421880A priority Critical patent/JPS5737708A/en
Publication of JPS5737708A publication Critical patent/JPS5737708A/en
Pending legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B15/00—Driving, starting or stopping record carriers of filamentary or web form; Driving both such record carriers and heads; Guiding such record carriers or containers therefor; Control thereof; Control of operating function
    • G11B15/02—Control of operating function, e.g. switching from recording to reproducing
    • G11B15/12—Masking of heads; circuits for Selecting or switching of heads between operative and inoperative functions or between different operative functions or for selection between operative heads; Masking of beams, e.g. of light beams
    • G11B15/14—Masking or switching periodically, e.g. of rotating heads

Landscapes

  • Television Signal Processing For Recording (AREA)

Abstract

PURPOSE:To switch heads by composing an amplifier of FETs and by providing a swiching element turning off one FET and another switching element short-circuiting a front stage for rotary-head initial-stage amplifier switching. CONSTITUTION:The outputs of video heads 41A and 41B are applied to amplifying elements 47A and 47B through rotary transformers. When a switching signal 58 goes up to a high level, a transistor (TR)61 turns on, so a TR48A turns off, so that a TR44A turns on. The FET47A is so set that its amplifying function is stopped. On the other hand, a TR48B turns on and the FET47B performs amplifying operation. A TR44B turns off and a reproduced signal induced by the video head 41B is passed through the rotary transformer 42B and amplified by the FET 47B, whose output is led to an output terminal 56. When the switching singal goes down to a low level, the reverse operation is carried out.
JP11421880A 1980-08-20 1980-08-20 Electronic switching device Pending JPS5737708A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP11421880A JPS5737708A (en) 1980-08-20 1980-08-20 Electronic switching device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP11421880A JPS5737708A (en) 1980-08-20 1980-08-20 Electronic switching device

Publications (1)

Publication Number Publication Date
JPS5737708A true JPS5737708A (en) 1982-03-02

Family

ID=14632173

Family Applications (1)

Application Number Title Priority Date Filing Date
JP11421880A Pending JPS5737708A (en) 1980-08-20 1980-08-20 Electronic switching device

Country Status (1)

Country Link
JP (1) JPS5737708A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH01119902A (en) * 1987-11-04 1989-05-12 Matsushita Electric Ind Co Ltd Sound recording and reproducing circuit

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH01119902A (en) * 1987-11-04 1989-05-12 Matsushita Electric Ind Co Ltd Sound recording and reproducing circuit

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