JPS5629816A - Magnetic recording and reproduction unit - Google Patents
Magnetic recording and reproduction unitInfo
- Publication number
- JPS5629816A JPS5629816A JP10303879A JP10303879A JPS5629816A JP S5629816 A JPS5629816 A JP S5629816A JP 10303879 A JP10303879 A JP 10303879A JP 10303879 A JP10303879 A JP 10303879A JP S5629816 A JPS5629816 A JP S5629816A
- Authority
- JP
- Japan
- Prior art keywords
- signal
- recording
- transistor
- output
- level
- 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)
- Control Of Amplification And Gain Control (AREA)
Abstract
PURPOSE: To enable the recording excellent in S/N, by providing the circuit stopping the recording signal if the recorded input signal is less than a given level preset.
CONSTITUTION: If the signal of smaller level than the set level is output from the microphone 1, a sufficient voltage to conduct the transistor TR is not obtained at the output of the amplifier 4, and the transistor TR is in the state of nonconduction and the signal of low level is not recorded. On the other hand, when the microphone signal more than the set level is present, the transistor TR is conductive with the output of the amplifier 4, the microphone signal is amplified 2, and recording is made on the magnetic tape from the recording head H. Accordingly, the recording of noise and vibrating sound of motor is not made without the signal to be inputted, allowing to remarkably increase S/N.
COPYRIGHT: (C)1981,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP10303879A JPS5629816A (en) | 1979-08-13 | 1979-08-13 | Magnetic recording and reproduction unit |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP10303879A JPS5629816A (en) | 1979-08-13 | 1979-08-13 | Magnetic recording and reproduction unit |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5629816A true JPS5629816A (en) | 1981-03-25 |
Family
ID=14343486
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP10303879A Pending JPS5629816A (en) | 1979-08-13 | 1979-08-13 | Magnetic recording and reproduction unit |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5629816A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS62223987A (en) * | 1986-03-26 | 1987-10-01 | Shin Kobe Electric Mach Co Ltd | Manufacture of spiral electrode |
-
1979
- 1979-08-13 JP JP10303879A patent/JPS5629816A/en active Pending
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS62223987A (en) * | 1986-03-26 | 1987-10-01 | Shin Kobe Electric Mach Co Ltd | Manufacture of spiral electrode |
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