IT7419603A1 - Circuito di controllo automatico dell'amplificazione per audio frequenze. - Google Patents

Circuito di controllo automatico dell'amplificazione per audio frequenze.

Info

Publication number
IT7419603A1
IT7419603A1 ITMI1974A19603A IT1960374A IT7419603A1 IT 7419603 A1 IT7419603 A1 IT 7419603A1 IT MI1974A19603 A ITMI1974A19603 A IT MI1974A19603A IT 1960374 A IT1960374 A IT 1960374A IT 7419603 A1 IT7419603 A1 IT 7419603A1
Authority
IT
Italy
Prior art keywords
input terminal
stage
balanced
emitter
transistor
Prior art date
Application number
ITMI1974A19603A
Other languages
English (en)
Italian (it)
Original Assignee
Microsystems Int 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 Microsystems Int Ltd filed Critical Microsystems Int Ltd
Publication of IT7419603A1 publication Critical patent/IT7419603A1/it

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q1/00—Details of selecting apparatus or arrangements
    • H04Q1/18—Electrical details
    • H04Q1/30—Signalling arrangements; Manipulation of signalling currents
    • H04Q1/44—Signalling arrangements; Manipulation of signalling currents using alternate current
    • H04Q1/444—Signalling arrangements; Manipulation of signalling currents using alternate current with voice-band signalling frequencies
    • H04Q1/446—Signalling arrangements; Manipulation of signalling currents using alternate current with voice-band signalling frequencies using one signalling frequency
    • H04Q1/4465—Signalling arrangements; Manipulation of signalling currents using alternate current with voice-band signalling frequencies using one signalling frequency the same frequency being used for all signalling information, e.g. A.C. nr.9 system
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03G—CONTROL OF AMPLIFICATION
    • H03G1/00—Details of arrangements for controlling amplification
    • H03G1/0005—Circuits characterised by the type of controlling devices operated by a controlling current or voltage signal
    • H03G1/0017—Circuits characterised by the type of controlling devices operated by a controlling current or voltage signal the device being at least one of the amplifying solid-state elements
    • H03G1/0023—Circuits characterised by the type of controlling devices operated by a controlling current or voltage signal the device being at least one of the amplifying solid-state elements in emitter-coupled or cascode amplifiers
    • 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

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Amplifiers (AREA)
  • Mobile Radio Communication Systems (AREA)
ITMI1974A19603A 1973-05-02 1974-01-18 Circuito di controllo automatico dell'amplificazione per audio frequenze. IT7419603A1 (it)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CA170,249A CA969689A (en) 1973-05-02 1973-05-02 Audio frequency automatic gain control circuit

Publications (1)

Publication Number Publication Date
IT7419603A1 true IT7419603A1 (it) 1975-07-18

Family

ID=4096587

Family Applications (1)

Application Number Title Priority Date Filing Date
ITMI1974A19603A IT7419603A1 (it) 1973-05-02 1974-01-18 Circuito di controllo automatico dell'amplificazione per audio frequenze.

Country Status (9)

Country Link
US (1) US3824345A (2)
JP (1) JPS5011104A (2)
AU (1) AU6515474A (2)
BE (1) BE808380A (2)
CA (1) CA969689A (2)
DE (1) DE2405757A1 (2)
FR (1) FR2228321A1 (2)
IT (1) IT7419603A1 (2)
NL (1) NL7405922A (2)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS54174930U (2) * 1978-05-30 1979-12-10
US4198603A (en) * 1978-09-22 1980-04-15 General Motors Corporation Radio receiver audio attenuator
US4318051A (en) * 1980-01-15 1982-03-02 Rca Corporation Symmetrically gain controlled differential amplifier
JPS5782617A (en) * 1980-11-11 1982-05-24 Toshiba Corp Safety device for combustor
JP2000513900A (ja) * 1997-04-29 2000-10-17 コーニンクレッカ フィリップス エレクトロニクス エヌ ヴィ 有線結合の電気通信装置及び給電回路
US6757395B1 (en) 2000-01-12 2004-06-29 Sonic Innovations, Inc. Noise reduction apparatus and method
ES2381512B1 (es) * 2009-06-04 2013-05-07 Coprecitec, S.L Aparato domestico a gas con control de llama

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3162801A (en) * 1961-04-20 1964-12-22 Sperry Rand Corp Automatic gain control system using signal suppression
US3579114A (en) * 1967-08-21 1971-05-18 Hitachi Ltd Automatic gain control system radio receivers and the like
US3566276A (en) * 1969-05-15 1971-02-23 Itt Slow rate agc circuit
JPS527304B1 (2) * 1969-08-29 1977-03-01

Also Published As

Publication number Publication date
CA969689A (en) 1975-06-17
BE808380A (fr) 1974-03-29
US3824345A (en) 1974-07-16
AU6515474A (en) 1975-08-07
FR2228321A1 (2) 1974-11-29
JPS5011104A (2) 1975-02-05
NL7405922A (2) 1974-11-05
DE2405757A1 (de) 1974-11-21

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