JPS5567916A - Magnetic recording and reproducing device - Google Patents

Magnetic recording and reproducing device

Info

Publication number
JPS5567916A
JPS5567916A JP14129278A JP14129278A JPS5567916A JP S5567916 A JPS5567916 A JP S5567916A JP 14129278 A JP14129278 A JP 14129278A JP 14129278 A JP14129278 A JP 14129278A JP S5567916 A JPS5567916 A JP S5567916A
Authority
JP
Japan
Prior art keywords
bias
frequency
low
oscillation output
currents
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.)
Granted
Application number
JP14129278A
Other languages
Japanese (ja)
Other versions
JPS5936328B2 (en
Inventor
Toshihiko Kobayashi
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 JP14129278A priority Critical patent/JPS5936328B2/en
Publication of JPS5567916A publication Critical patent/JPS5567916A/en
Publication of JPS5936328B2 publication Critical patent/JPS5936328B2/en
Expired legal-status Critical Current

Links

Landscapes

  • Amplifiers (AREA)
  • Inductance-Capacitance Distribution Constants And Capacitance-Resistance Oscillators (AREA)

Abstract

PURPOSE: To equalize bias currents for high, middle and low frequency ranges by making the impedance of a trap circuit, preventing a bias oscillation output from leaking to a recording amplifier side, greater than a middle-frequency-range bias oscillation output.
CONSTITUTION: Bias currents for high, middle and low frequency ranges from transformer 2 coupled with bias oscillation circuit 1 are applied to heads 6 and 6' together with a recording signal, without leaking to a recording amplifier side, by way of capacitors C1WC3, resistance R0, trap coils 3 and 3', capacitors C8 and C8', etc. With switch S1 connected to contact fM in accordance with the middle-frequency bias current, the impedance of a trap circuit applied with high and low-frequency bias currents equal in level is increased by resistance R0 and the middle-frequency bias current becomes the same current as high and low-frequency bias currents and are applied to heads 6 and 6' to select a bias current for a desired band, so that an influence of a bias oscillation output will be prevented from being exerted in reception of radio broadcasting.
COPYRIGHT: (C)1980,JPO&Japio
JP14129278A 1978-11-15 1978-11-15 magnetic recording and playback device Expired JPS5936328B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP14129278A JPS5936328B2 (en) 1978-11-15 1978-11-15 magnetic recording and playback device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP14129278A JPS5936328B2 (en) 1978-11-15 1978-11-15 magnetic recording and playback device

Publications (2)

Publication Number Publication Date
JPS5567916A true JPS5567916A (en) 1980-05-22
JPS5936328B2 JPS5936328B2 (en) 1984-09-03

Family

ID=15288484

Family Applications (1)

Application Number Title Priority Date Filing Date
JP14129278A Expired JPS5936328B2 (en) 1978-11-15 1978-11-15 magnetic recording and playback device

Country Status (1)

Country Link
JP (1) JPS5936328B2 (en)

Also Published As

Publication number Publication date
JPS5936328B2 (en) 1984-09-03

Similar Documents

Publication Publication Date Title
JPS56111326A (en) Antenna circuit of am radio receiver
JPS53111708A (en) Vide signal reproducing circuit
JPS54118210A (en) Bias current setting device
JPS5567916A (en) Magnetic recording and reproducing device
GB1537320A (en) Single control power-frequency control circuit
KR920007541Y1 (en) Improved stereo noise canceller
JPS563414A (en) Sound recorder/reproducer
JPS5637806A (en) Magnetic recording circuit device
JPS5794909A (en) Magnetic recorder and reproducer
JPS55140337A (en) Intermodulation disturbance improving circuit of radio receiver
JPS5694519A (en) Magnetic recording and reproducing circuit
JPS56110317A (en) Sound volume controller
JPS5548806A (en) Magnetic recording and reproducing unit
JPS5545178A (en) Recording bias setter of magnetic recording and reproducing device
JPS57202136A (en) Muting circuit
JPS55139612A (en) Magnetic recording and reproducing device
JPS5555618A (en) Radio receiver
JPS5595419A (en) Tuning signal generating circuit
JPS57132484A (en) Receiver for television audio signal
JPS55162637A (en) Fm receiver
JPS57201345A (en) Radio receiver
JPS5567914A (en) Tape recorder
JPS55165035A (en) Fm radio receiver
JPS5680809A (en) Signal recording system
JPS55165034A (en) Fm radio receiver