JPS5629816A - Magnetic recording and reproduction unit - Google Patents

Magnetic recording and reproduction unit

Info

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
Application number
JP10303879A
Other languages
Japanese (ja)
Inventor
Tadahide Sumasu
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.)
Panasonic Holdings Corp
Original Assignee
Matsushita Electric Industrial 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 Matsushita Electric Industrial Co Ltd filed Critical Matsushita Electric Industrial Co Ltd
Priority to JP10303879A priority Critical patent/JPS5629816A/en
Publication of JPS5629816A publication Critical patent/JPS5629816A/en
Pending legal-status Critical Current

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
JP10303879A 1979-08-13 1979-08-13 Magnetic recording and reproduction unit Pending JPS5629816A (en)

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)

* Cited by examiner, † Cited by third party
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

Cited By (1)

* Cited by examiner, † Cited by third party
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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