GB1108413A - Improvements in electrical limiters and related devices - Google Patents

Improvements in electrical limiters and related devices

Info

Publication number
GB1108413A
GB1108413A GB1181766A GB1181766A GB1108413A GB 1108413 A GB1108413 A GB 1108413A GB 1181766 A GB1181766 A GB 1181766A GB 1181766 A GB1181766 A GB 1181766A GB 1108413 A GB1108413 A GB 1108413A
Authority
GB
United Kingdom
Prior art keywords
signal
rectifier system
control
gain
shortest
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
GB1181766A
Inventor
William Isbister Manson
Donovan Ernest Lea Shorter
David William Stebbings
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.)
British Broadcasting Corp
Original Assignee
British Broadcasting 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 British Broadcasting Corp filed Critical British Broadcasting Corp
Priority to GB1181766A priority Critical patent/GB1108413A/en
Publication of GB1108413A publication Critical patent/GB1108413A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03G—CONTROL OF AMPLIFICATION
    • H03G7/00—Volume compression or expansion in amplifiers

Landscapes

  • Tone Control, Compression And Expansion, Limiting Amplitude (AREA)
  • Reduction Or Emphasis Of Bandwidth Of Signals (AREA)

Abstract

1,108,413. Automatic gain control. BRITISH BROADCASTING CORPORATION. 27 Feb., 1967 [17 March, 1966], No. 11817/66. Heading H3Q and H4R. An audio frequency compressor or limiter, i.e. arrangement limiting the maximum amplitude of a signal without introducing appreciable waveform distortion, comprises a control rectifier system 10 which is sufficiently rapid in action to register the crest of the shortest pulse expected in the input signal. Responsive to the rectifier system is means, i.e. shaping network 12, providing a control signal having a rate of change substantially slower than that of the shortest signal pulse, and this controls a variable gain amplifier 14, in the signal path which is fed from the signal input via a delay network 16. The arrangement is such as to prevent overshoot of short pulses beyond the limiting level, while at the same time producing a gain reduction which is sufficiently gradual as not to produce audible modulation distortion. In a modification (Fig. 3, not shown), there is interposed between the signal input and the control rectifier system a further variable gain amplifier, the gain of which is controlled directly from the rectifier system.
GB1181766A 1966-03-17 1966-03-17 Improvements in electrical limiters and related devices Expired GB1108413A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB1181766A GB1108413A (en) 1966-03-17 1966-03-17 Improvements in electrical limiters and related devices

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1181766A GB1108413A (en) 1966-03-17 1966-03-17 Improvements in electrical limiters and related devices

Publications (1)

Publication Number Publication Date
GB1108413A true GB1108413A (en) 1968-04-03

Family

ID=9993230

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1181766A Expired GB1108413A (en) 1966-03-17 1966-03-17 Improvements in electrical limiters and related devices

Country Status (1)

Country Link
GB (1) GB1108413A (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2469051A1 (en) * 1979-11-05 1981-05-08 Thomson Csf Voice compressor circuit for transmitter modulator - has delay circuit and attenuator controlled by series connected attenuator and detector circuit
US4700361A (en) * 1983-10-07 1987-10-13 Dolby Laboratories Licensing Corporation Spectral emphasis and de-emphasis
US4700362A (en) * 1983-10-07 1987-10-13 Dolby Laboratories Licensing Corporation A-D encoder and D-A decoder system
US4947133A (en) * 1987-01-22 1990-08-07 National Research Development Corporation Method and apparatus for automatic signal level adustment
WO2008156427A1 (en) * 2007-06-21 2008-12-24 Creative Technology Ltd Automatic gain control circuit for volume control and corresponding method for volume control

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2469051A1 (en) * 1979-11-05 1981-05-08 Thomson Csf Voice compressor circuit for transmitter modulator - has delay circuit and attenuator controlled by series connected attenuator and detector circuit
US4700361A (en) * 1983-10-07 1987-10-13 Dolby Laboratories Licensing Corporation Spectral emphasis and de-emphasis
US4700362A (en) * 1983-10-07 1987-10-13 Dolby Laboratories Licensing Corporation A-D encoder and D-A decoder system
US4947133A (en) * 1987-01-22 1990-08-07 National Research Development Corporation Method and apparatus for automatic signal level adustment
WO2008156427A1 (en) * 2007-06-21 2008-12-24 Creative Technology Ltd Automatic gain control circuit for volume control and corresponding method for volume control

Similar Documents

Publication Publication Date Title
GB1510691A (en) Electronic singing suppressor device
GB1092586A (en) Improvements in or relating to radio transmitters
GB1215566A (en) A frequency shaping system
GB1108413A (en) Improvements in electrical limiters and related devices
GB1036328A (en) Improvements in or relating to amplitude discriminator circuit arrangements
US3706045A (en) Method and a device for eliminating the noise in a transmission chain of radio-electric signals
GB1197509A (en) Pulse Delta Modulation Transmission System and Transmitters and Receivers to be Used in Said System
GB1207186A (en) Process control method
GB1101488A (en) Improvements in and relating to electric signal amplifiers
GB1476516A (en) Automatic gain control circuit
GB1427607A (en) Audio signal transmitting systems
GB1216298A (en) Audio level clipper and compressor
EP0052415A3 (en) Frequency characteristic adjusting apparatus
US2151739A (en) Reduction of noise
GB1157723A (en) Transistor Deflection Control Arrangements for Television Equipment
GB1273409A (en) Automatic equaliser for correcting variations in attenuation
GB1191423A (en) Signal Translating Arrangement.
ES372687A1 (en) Synchronizing separator for separating synchronizing pulses from a composite video signal
GB525629A (en) Improvements in or relating to television systems
GB1427029A (en) Radio receiving apparatus
JPS5623010A (en) Gain limit amplifying circuit
JPS6221443B2 (en)
GB1080118A (en) Improvements in or relating to low-frequency amplifier circuits
GB1267894A (en) Gated video inverter
GB1219563A (en) Improvements in or relating to noise reduction insignalling circuits