[go: up one dir, main page]

JPS5518162A - Noise reduction circuit - Google Patents

Noise reduction circuit

Info

Publication number
JPS5518162A
JPS5518162A JP9126678A JP9126678A JPS5518162A JP S5518162 A JPS5518162 A JP S5518162A JP 9126678 A JP9126678 A JP 9126678A JP 9126678 A JP9126678 A JP 9126678A JP S5518162 A JPS5518162 A JP S5518162A
Authority
JP
Japan
Prior art keywords
signal
amplifier
recording time
time
high band
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
JP9126678A
Other languages
Japanese (ja)
Other versions
JPS6249762B2 (en
Inventor
Kenzo Akagiri
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 JP9126678A priority Critical patent/JPS5518162A/en
Publication of JPS5518162A publication Critical patent/JPS5518162A/en
Publication of JPS6249762B2 publication Critical patent/JPS6249762B2/ja
Granted legal-status Critical Current

Links

Landscapes

  • Signal Processing Not Specific To The Method Of Recording And Reproducing (AREA)
  • Tone Control, Compression And Expansion, Limiting Amplitude (AREA)

Abstract

PURPOSE: To reduce the noise in a simple structure to ensure a suitable application for the IC formation by intensifying the high band with connection between the input amplifier and the resistance circuit at the sound recording time and then obtaining the output featuring the opposite characteristics to the recording time by applying the negative feedback signal to the input amplifier at the reproducing time.
CONSTITUTION: The signals from input terminal 1E are applied to input amplifier 21 at the sound recording time. And if the value of resistors 22 and 23 are referred to as R1 and R2, the flat signal festuring the gain of (R1+R2)/R2 is supplied to variable HPF7, amplifier 8 and limiter 9 each to form the signal which intensifies the high band. This signal is added 27 with the flat signal to be delivered 11E via buffer amplifier 28. At the reproducing time, the signals sent from register 28, HPF7, amplifier 8 and limiter 9 are fed negatively back to the signal from input terminal 1D, and then the signal of amplifier 21 is delivered 11D under the sufficient gain of and the opposite characteristics to the recording time. Thus, both the high band intensification of the recording time and the opposite characteristics of the reproducing time can be secured. As a result, the noise can be reduced to ensure a suitable application for the IC formation.
COPYRIGHT: (C)1980,JPO&Japio
JP9126678A 1978-07-26 1978-07-26 Noise reduction circuit Granted JPS5518162A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP9126678A JPS5518162A (en) 1978-07-26 1978-07-26 Noise reduction circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP9126678A JPS5518162A (en) 1978-07-26 1978-07-26 Noise reduction circuit

Publications (2)

Publication Number Publication Date
JPS5518162A true JPS5518162A (en) 1980-02-08
JPS6249762B2 JPS6249762B2 (en) 1987-10-21

Family

ID=14021616

Family Applications (1)

Application Number Title Priority Date Filing Date
JP9126678A Granted JPS5518162A (en) 1978-07-26 1978-07-26 Noise reduction circuit

Country Status (1)

Country Link
JP (1) JPS5518162A (en)

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5243837U (en) * 1975-09-20 1977-03-28
JPS5313965A (en) * 1976-07-23 1978-02-08 Mitsubishi Electric Corp Synchronism indicator

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5243837B2 (en) * 1973-07-17 1977-11-02

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5243837U (en) * 1975-09-20 1977-03-28
JPS5313965A (en) * 1976-07-23 1978-02-08 Mitsubishi Electric Corp Synchronism indicator

Also Published As

Publication number Publication date
JPS6249762B2 (en) 1987-10-21

Similar Documents

Publication Publication Date Title
JPS5571400A (en) Monolithic power ic and acoustic unit
JPS54160150A (en) Frequency selecting circuit
JPS5518162A (en) Noise reduction circuit
JPS57141108A (en) Current mode preamplifier
JPS5787216A (en) Amplifying circuit
EP0052415A3 (en) Frequency characteristic adjusting apparatus
JPS57199396A (en) Speaker input controlling circuit
JPS5753129A (en) Active filter
JPS57190487A (en) Signal processing circuit of magnetic recording and reproducing device
JPS5724113A (en) Digital filter device
JPS5326647A (en) Automatic gain control circuit
JPS54142960A (en) Amplifying device
JPS558657A (en) Signal delay circuit
JPS5577007A (en) Noise reduction circuit of analogue memory element
JPS56103511A (en) Monolithic semiconductor integrated circuit
JPS56110311A (en) Amplifying circuit
JPS55127737A (en) Noise elimination circuit
JPS57173205A (en) Btl amplifier
JPS56106406A (en) Audio amplifier
JPS5675712A (en) Power amplifier
JPS57190405A (en) Amplifier
JPS5757011A (en) Amplifying circuit
JPS5282173A (en) Time delay circuit device
JPS57208709A (en) Field effect transistor amplifier with low noise broad wide band
JPS54100236A (en) Integrator featuring drift compensation characteristics