GB1507186A - Limiter circuit - Google Patents

Limiter circuit

Info

Publication number
GB1507186A
GB1507186A GB2615875A GB2615875A GB1507186A GB 1507186 A GB1507186 A GB 1507186A GB 2615875 A GB2615875 A GB 2615875A GB 2615875 A GB2615875 A GB 2615875A GB 1507186 A GB1507186 A GB 1507186A
Authority
GB
United Kingdom
Prior art keywords
transistor
capacitor
june
output
automatic gain
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.)
Expired
Application number
GB2615875A
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
Priority claimed from JP49072183A external-priority patent/JPS5036913A/ja
Application filed by Sony Corp filed Critical Sony Corp
Publication of GB1507186A publication Critical patent/GB1507186A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03G—CONTROL OF AMPLIFICATION
    • H03G3/00—Gain control in amplifiers or frequency changers
    • H03G3/20—Automatic control
    • H03G3/30—Automatic control in amplifiers having semiconductor devices
    • H03G3/3005—Automatic control in amplifiers having semiconductor devices in amplifiers suitable for low-frequencies, e.g. audio amplifiers
    • H03G3/301—Automatic control in amplifiers having semiconductor devices in amplifiers suitable for low-frequencies, e.g. audio amplifiers the gain being continuously variable
    • H03G3/3015—Automatic control in amplifiers having semiconductor devices in amplifiers suitable for low-frequencies, e.g. audio amplifiers the gain being continuously variable using diodes or transistors
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03G—CONTROL OF AMPLIFICATION
    • H03G11/00—Limiting amplitude; Limiting rate of change of amplitude ; Clipping in general
    • H03G11/04—Limiting level dependent on strength of signal; Limiting level dependent on strength of carrier on which signal is modulated

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Control Of Amplification And Gain Control (AREA)

Abstract

1507186 Automatic gain control SONY CORP 19 June 1975 [20 June 1974] 26158/75 Heading H4R In an automatic gain control circuit, particularly for a magnetic recorder, a control signal is derived from the output of the recording amplifier and fed to a variable gain circuit, formed by resistor 4 and transistor 13, via a transistor emitter follower 15. The emitter follower rectifies the signal at the output of the amplifier when it exceeds a predetermined value and provides a low impedance source to charge capacitor 12 to provide a fast attack time, set by variable resistor 16 and capacitor 12, while the decay of the control is set by capacitor 12 and the base emitter resistance of transistor 13. Switch 14 is provided to disable or reset the limiter.
GB2615875A 1974-06-24 1975-06-19 Limiter circuit Expired GB1507186A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP49072183A JPS5036913A (en) 1973-06-29 1974-06-24

Publications (1)

Publication Number Publication Date
GB1507186A true GB1507186A (en) 1978-04-12

Family

ID=13481837

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2615875A Expired GB1507186A (en) 1974-06-24 1975-06-19 Limiter circuit

Country Status (5)

Country Link
CA (1) CA1034873A (en)
DE (1) DE2527604A1 (en)
FR (1) FR2275931A1 (en)
GB (1) GB1507186A (en)
NL (1) NL7507434A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2123231A (en) * 1982-06-17 1984-01-25 Ates Componenti Elettron Gain control of audio-amplifying systems

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2123231A (en) * 1982-06-17 1984-01-25 Ates Componenti Elettron Gain control of audio-amplifying systems

Also Published As

Publication number Publication date
NL7507434A (en) 1975-12-23
FR2275931A1 (en) 1976-01-16
DE2527604A1 (en) 1976-01-08
CA1034873A (en) 1978-07-18
FR2275931B1 (en) 1981-03-20

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Legal Events

Date Code Title Description
PS Patent sealed
PCNP Patent ceased through non-payment of renewal fee