JPS5782225A - Playback equalizer - Google Patents

Playback equalizer

Info

Publication number
JPS5782225A
JPS5782225A JP15586480A JP15586480A JPS5782225A JP S5782225 A JPS5782225 A JP S5782225A JP 15586480 A JP15586480 A JP 15586480A JP 15586480 A JP15586480 A JP 15586480A JP S5782225 A JPS5782225 A JP S5782225A
Authority
JP
Japan
Prior art keywords
playback
peaking
circuit
increased
negative feedback
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
JP15586480A
Other languages
Japanese (ja)
Inventor
Masaaki Utsunomiya
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.)
Toshiba Corp
Original Assignee
Toshiba Corp
Tokyo Shibaura Electric 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 Toshiba Corp, Tokyo Shibaura Electric Co Ltd filed Critical Toshiba Corp
Priority to JP15586480A priority Critical patent/JPS5782225A/en
Publication of JPS5782225A publication Critical patent/JPS5782225A/en
Pending legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B5/00—Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor
    • G11B5/02—Recording, reproducing, or erasing methods; Read, write or erase circuits therefor
    • G11B5/027—Analogue recording
    • G11B5/035—Equalising

Landscapes

  • Television Signal Processing For Recording (AREA)

Abstract

PURPOSE:To increase the S/N, to reduce the number of components, and to simplify the circuit pattern, by connecting a peaking circuit between input and output terminals of desired amplifying stages and providing a negative feedback adjusting means. CONSTITUTION:No control signal is applied to a transistor (TR) 27 at the standard speed. A signal reproduced by a playback head is subjected to equalization matched to the standard speed at a playback equalizer 1. On the other hand, a low-speed switching signal from the playback device switches the TR27 to ON. Thus, the negative feedback amount at high frequencies of the playback signal reproduced at the playback head is reduced, thereby the amplification gain of an amplifier 21 of the 1st stage is increased. According to the increase in the amplified gain, the peaking frequency of a peaking circuit 4 is lowered and the damping amount of the said peaking circuit can be reduced. Thus, the S/N can be increased.
JP15586480A 1980-11-07 1980-11-07 Playback equalizer Pending JPS5782225A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP15586480A JPS5782225A (en) 1980-11-07 1980-11-07 Playback equalizer

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP15586480A JPS5782225A (en) 1980-11-07 1980-11-07 Playback equalizer

Publications (1)

Publication Number Publication Date
JPS5782225A true JPS5782225A (en) 1982-05-22

Family

ID=15615167

Family Applications (1)

Application Number Title Priority Date Filing Date
JP15586480A Pending JPS5782225A (en) 1980-11-07 1980-11-07 Playback equalizer

Country Status (1)

Country Link
JP (1) JPS5782225A (en)

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5134259U (en) * 1974-09-06 1976-03-13
JPS5144912A (en) * 1974-10-15 1976-04-16 Sony Corp Teepurekooda niokeru saiseiikoraizakairo

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5134259U (en) * 1974-09-06 1976-03-13
JPS5144912A (en) * 1974-10-15 1976-04-16 Sony Corp Teepurekooda niokeru saiseiikoraizakairo

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