GB1461145A - Multichannel control circuit wich dc operated control devices - Google Patents

Multichannel control circuit wich dc operated control devices

Info

Publication number
GB1461145A
GB1461145A GB1957274A GB1957274A GB1461145A GB 1461145 A GB1461145 A GB 1461145A GB 1957274 A GB1957274 A GB 1957274A GB 1957274 A GB1957274 A GB 1957274A GB 1461145 A GB1461145 A GB 1461145A
Authority
GB
United Kingdom
Prior art keywords
signal
control
transistor
differential amplifier
current
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
GB1957274A
Other languages
English (en)
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.)
Motorola Solutions Inc
Original Assignee
Motorola Inc
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 Motorola Inc filed Critical Motorola Inc
Publication of GB1461145A publication Critical patent/GB1461145A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03G—CONTROL OF AMPLIFICATION
    • H03G5/00—Tone control or bandwidth control in amplifiers
    • H03G5/02—Manually-operated control
    • H03G5/04—Manually-operated control in untuned amplifiers
    • H03G5/10—Manually-operated control in untuned amplifiers having semiconductor devices
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03G—CONTROL OF AMPLIFICATION
    • H03G3/00—Gain control in amplifiers or frequency changers
    • H03G3/02—Manually-operated control
    • H03G3/04—Manually-operated control in untuned amplifiers
    • H03G3/10—Manually-operated control in untuned amplifiers having semiconductor devices
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04S—STEREOPHONIC SYSTEMS 
    • H04S7/00—Indicating arrangements; Control arrangements, e.g. balance control
    • H04S7/30—Control circuits for electronic adaptation of the sound field
    • H04S7/307—Frequency adjustment, e.g. tone control

Landscapes

  • Tone Control, Compression And Expansion, Limiting Amplitude (AREA)
  • Stereophonic System (AREA)
  • Control Of Amplification And Gain Control (AREA)
GB1957274A 1973-06-19 1974-05-03 Multichannel control circuit wich dc operated control devices Expired GB1461145A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US371437A US3875334A (en) 1973-06-19 1973-06-19 Multi-channel control circuit with D-C operated control devices

Publications (1)

Publication Number Publication Date
GB1461145A true GB1461145A (en) 1977-01-13

Family

ID=23463996

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1957274A Expired GB1461145A (en) 1973-06-19 1974-05-03 Multichannel control circuit wich dc operated control devices

Country Status (7)

Country Link
US (1) US3875334A (enrdf_load_stackoverflow)
JP (1) JPS5840367B2 (enrdf_load_stackoverflow)
CA (1) CA998619A (enrdf_load_stackoverflow)
DE (1) DE2429242A1 (enrdf_load_stackoverflow)
GB (1) GB1461145A (enrdf_load_stackoverflow)
HK (1) HK73779A (enrdf_load_stackoverflow)
IT (1) IT1013490B (enrdf_load_stackoverflow)

Families Citing this family (20)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3937885A (en) * 1974-09-06 1976-02-10 Motorola, Inc. Control circuit for a matrixed four channel audio reproducing system
JPS5234649U (enrdf_load_stackoverflow) * 1975-09-03 1977-03-11
JPS5265644A (en) * 1975-11-26 1977-05-31 Matsushita Electric Ind Co Ltd Volume control circuit
US4045748A (en) * 1975-12-19 1977-08-30 The Magnavox Company Audio control system
JPS5313860A (en) * 1976-07-23 1978-02-07 Pioneer Electronic Corp Tone control device
US4113984A (en) * 1976-09-17 1978-09-12 General Motors Corporation Voltage translating circuit for volume and balance control of a four-channel audio system
US4076959A (en) * 1976-10-08 1978-02-28 General Motors Corporation Volume, tone and balance control for multi-channel audio systems
JPS5383553A (en) * 1976-12-29 1978-07-24 Matsushita Electric Ind Co Ltd Aural circuit
US4070633A (en) * 1977-03-10 1978-01-24 Motorola Inc. Remote controlled amplifier
JPS5760714A (en) * 1980-09-29 1982-04-12 Toshiba Corp Adjusting device for frequency characteristic
US4404527A (en) * 1980-11-03 1983-09-13 General Motors Corporation Bridge audio amplifier including low level fade control
FR2501935B1 (fr) * 1981-03-13 1985-09-13 Thomson Csf Circuit de commande de volume et de tonalite incorporant une correction physiologique sans filtre supplementaire
US4466118A (en) * 1983-02-01 1984-08-14 Motorola, Inc. Dual range audio level control
JPS6022265U (ja) * 1983-07-25 1985-02-15 株式会社　ジエ−アンドエム ドライバ
DE3627056A1 (de) * 1986-08-09 1988-02-18 Thomson Brandt Gmbh Schaltung zur dynamik-kompression oder -expansion in einem nutzsignalweg
CH686753A5 (de) * 1993-07-19 1996-06-14 Yair Dr Schiftan Elektronische Vorrichtung zur Erzeugung von akustischen raeuumlichen Effekten.
DE50006771D1 (de) * 1999-12-22 2004-07-15 2 & 2 & 2 Ag Verfahren und anlage zur aufnahme und wiedergabe von klängen
JP2002142300A (ja) * 2000-11-06 2002-05-17 Pioneer Electronic Corp 音場形成回路および音場形成装置
US8411877B2 (en) * 2009-10-13 2013-04-02 Conexant Systems, Inc. Tuning and DAC selection of high-pass filters for audio codecs
JP5327481B2 (ja) * 2011-01-13 2013-10-30 オンキヨー株式会社 トーンコントロール装置

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3466572A (en) * 1965-10-14 1969-09-09 Automatic Elect Lab Apparatus for regulating signals in response to their total root mean square value
US3631365A (en) * 1968-11-01 1971-12-28 Dolby Laboratories Inc Signal compressors and expanders
US3769459A (en) * 1970-07-20 1973-10-30 Motorola Inc Volume and tone control for multi-channel audio systems
US3752928A (en) * 1971-03-04 1973-08-14 D Flickinger Amplifier system utilizing regenerative and degenerative feedback to shape the frequency response
DE2262089C3 (de) * 1972-12-19 1975-10-30 Philips Patentverwaltung Gmbh, 2000 Hamburg Schaltungsanordnung zur elektronischen Frequenzbeeinflussung, insbesondere elektronischer Klangeinsteller

Also Published As

Publication number Publication date
DE2429242A1 (de) 1975-01-16
US3875334A (en) 1975-04-01
JPS5037401A (enrdf_load_stackoverflow) 1975-04-08
CA998619A (en) 1976-10-19
JPS5840367B2 (ja) 1983-09-05
IT1013490B (it) 1977-03-30
HK73779A (en) 1979-10-26

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Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
PCNP Patent ceased through non-payment of renewal fee