JPS5454008A - Recording and reproducing circuit - Google Patents
Recording and reproducing circuitInfo
- Publication number
- JPS5454008A JPS5454008A JP12031077A JP12031077A JPS5454008A JP S5454008 A JPS5454008 A JP S5454008A JP 12031077 A JP12031077 A JP 12031077A JP 12031077 A JP12031077 A JP 12031077A JP S5454008 A JPS5454008 A JP S5454008A
- Authority
- JP
- Japan
- Prior art keywords
- switch
- contact
- inverters
- reproducing
- signals
- 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
Links
Abstract
PURPOSE: To provide a small circuit having an increased number of mechnical switches by changing the modes with the use of an electronic switch which is made coactive with the mechanical switches.
CONSTITUTION: When a switch 21 is connected with a contact P, the power supply to a bias oscillator 22 is blocked, and a control potential is lowered so that MOS inverters 25 and 26 of complementary type constituting an electronic switch have their P channels rendered conductive and so that inverters 27 to 29 have their N channels rendered conductive. As a result, the reproducing signals through a head 31 are impressed upon a reproducing amplifier 33 thereby to effect a reproducing condition. When the switch 21 is interchanged to a contact R, simultaneously with the power supply to the oscillator 22 and the change in the conducting conditions of the inverters 25 to 29, the recording signals which are prepared by adding a bias current to the signals from a speaker 35 are impressed upon the head 31. As a result, it is possible to provide a miniature mode interchanging circuit which uses a miniature mechanical switch of two-contact interchanging type without the use of a number of mechanical switches
COPYRIGHT: (C)1979,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP12031077A JPS5454008A (en) | 1977-10-06 | 1977-10-06 | Recording and reproducing circuit |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP12031077A JPS5454008A (en) | 1977-10-06 | 1977-10-06 | Recording and reproducing circuit |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5454008A true JPS5454008A (en) | 1979-04-27 |
Family
ID=14783063
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP12031077A Pending JPS5454008A (en) | 1977-10-06 | 1977-10-06 | Recording and reproducing circuit |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5454008A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5674851A (en) * | 1979-11-21 | 1981-06-20 | Seiko Instr & Electronics Ltd | Electronic switch of tape recorder |
US4810790A (en) * | 1986-10-09 | 1989-03-07 | Daikin Industries Ltd. | 5-fluorouracil derivatives useful as carcinostatic substances |
-
1977
- 1977-10-06 JP JP12031077A patent/JPS5454008A/en active Pending
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5674851A (en) * | 1979-11-21 | 1981-06-20 | Seiko Instr & Electronics Ltd | Electronic switch of tape recorder |
US4810790A (en) * | 1986-10-09 | 1989-03-07 | Daikin Industries Ltd. | 5-fluorouracil derivatives useful as carcinostatic substances |
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