JPS5558829A - Magnetic reproducing unit - Google Patents

Magnetic reproducing unit

Info

Publication number
JPS5558829A
JPS5558829A JP12971878A JP12971878A JPS5558829A JP S5558829 A JPS5558829 A JP S5558829A JP 12971878 A JP12971878 A JP 12971878A JP 12971878 A JP12971878 A JP 12971878A JP S5558829 A JPS5558829 A JP S5558829A
Authority
JP
Japan
Prior art keywords
circuit
high band
capacitor
compensate
noise
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
JP12971878A
Other languages
Japanese (ja)
Inventor
Shoichi Nakamura
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.)
Sony Corp
Original Assignee
Sony Corp
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 Sony Corp filed Critical Sony Corp
Priority to JP12971878A priority Critical patent/JPS5558829A/en
Publication of JPS5558829A publication Critical patent/JPS5558829A/en
Pending legal-status Critical Current

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  • Amplifiers (AREA)

Abstract

PURPOSE: To compensate the attenuation at high band by audible sense and to avoid increase in noise, by changing the amount of high band compensation of the peaking circuit in accordance with the input signal level.
CONSTITUTION: The reproducing signal from the magnetic reproducing head fed to the terminal 1 is amplified at the amplification circuit 2 and inputted to the peaking circuit. In this case, the resonant frequency of the circuit 4 is taken, for example, as 10kHz to obtain the frequency characteristics to compensate the lowering in the output level at high band of the circuit 2. The output of the circuit 4 is fed to the diode 9 constituting the capacitor 12 and the signal level detection circuit via the waiting level detection circuit network 7 and the amplifier 8 for operation sensitivity set. Further, the back up time determined with the resistor 11 and the capacitor 12 and the recovery time determined with the resistors 10, 11,13 and 14 and the capacitor 12 are set so that the change in the noise can not be minded. Further, in this case, the resistance value between the circuit 4 and ground is changed with the impedance value of the transistor 15 and the amount of high band compensation of the circuit 4 is changed.
COPYRIGHT: (C)1980,JPO&Japio
JP12971878A 1978-10-20 1978-10-20 Magnetic reproducing unit Pending JPS5558829A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP12971878A JPS5558829A (en) 1978-10-20 1978-10-20 Magnetic reproducing unit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP12971878A JPS5558829A (en) 1978-10-20 1978-10-20 Magnetic reproducing unit

Publications (1)

Publication Number Publication Date
JPS5558829A true JPS5558829A (en) 1980-05-01

Family

ID=15016482

Family Applications (1)

Application Number Title Priority Date Filing Date
JP12971878A Pending JPS5558829A (en) 1978-10-20 1978-10-20 Magnetic reproducing unit

Country Status (1)

Country Link
JP (1) JPS5558829A (en)

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