JPS5476210A - Noise reduction on-off device - Google Patents
Noise reduction on-off deviceInfo
- Publication number
- JPS5476210A JPS5476210A JP14352777A JP14352777A JPS5476210A JP S5476210 A JPS5476210 A JP S5476210A JP 14352777 A JP14352777 A JP 14352777A JP 14352777 A JP14352777 A JP 14352777A JP S5476210 A JPS5476210 A JP S5476210A
- Authority
- JP
- Japan
- Prior art keywords
- circuit
- noise reduction
- variable resistance
- integrated circuit
- electronic variable
- 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
Landscapes
- Signal Processing Not Specific To The Method Of Recording And Reproducing (AREA)
Abstract
PURPOSE: To reduce the number of switches in the case of handling plural channels and improve reliabiability and economy by so arranging the device that the resistance value of an electronic variable resistance circuit may be controlled by DC voltage from the outside.
CONSTITUTION: In a noise reduction device, the one which has gone outside of an integrated circuit IC' out of the bisected outputs of a gain amplifier B is supplied directly to a gain amplifier C through an equalizer circuit EQ and arrangement is so made that the control signal input end C-IN of an electronic variable resistance circuit F is connected to the noise reduction ON-OFF circuit NC provided outside the integrated circuit IC'. If the noise reduction switch SWNR is set at the ON side, the noise reduction ON state is set and when it is set to the OFF side, the output of a rectifying circuit G is superposed to a DC power source VCC potential but the resistance value of the electronic variable resistance circuit F becomes approximately zero, thus the output from the main pass side only is derived from the output end OUT of the integrated circuit IC and the noise reduction OFF state is set.
COPYRIGHT: (C)1979,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP14352777A JPS5476210A (en) | 1977-11-30 | 1977-11-30 | Noise reduction on-off device |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP14352777A JPS5476210A (en) | 1977-11-30 | 1977-11-30 | Noise reduction on-off device |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5476210A true JPS5476210A (en) | 1979-06-18 |
Family
ID=15340805
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP14352777A Pending JPS5476210A (en) | 1977-11-30 | 1977-11-30 | Noise reduction on-off device |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5476210A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS586614A (en) * | 1981-07-06 | 1983-01-14 | Pioneer Electronic Corp | Tape noise reduction system of tape recorder |
-
1977
- 1977-11-30 JP JP14352777A patent/JPS5476210A/en active Pending
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS586614A (en) * | 1981-07-06 | 1983-01-14 | Pioneer Electronic Corp | Tape noise reduction system of tape recorder |
JPH0315276B2 (en) * | 1981-07-06 | 1991-02-28 | Paionia Kk |
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