FR2271700A1 - Variable gain amplifier for videophone - has amplifier transistor charged by field effect transistor with feedback loop - Google Patents

Variable gain amplifier for videophone - has amplifier transistor charged by field effect transistor with feedback loop

Info

Publication number
FR2271700A1
FR2271700A1 FR7416617A FR7416617A FR2271700A1 FR 2271700 A1 FR2271700 A1 FR 2271700A1 FR 7416617 A FR7416617 A FR 7416617A FR 7416617 A FR7416617 A FR 7416617A FR 2271700 A1 FR2271700 A1 FR 2271700A1
Authority
FR
France
Prior art keywords
field effect
amplifier
transistor
effect transistor
feedback loop
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
FR7416617A
Other languages
English (en)
French (fr)
Other versions
FR2271700B1 (enExample
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.)
Alcatel CIT SA
Nokia Inc
Original Assignee
Alcatel CIT SA
Nokia 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 Alcatel CIT SA, Nokia Inc filed Critical Alcatel CIT SA
Priority to FR7416617A priority Critical patent/FR2271700A1/fr
Publication of FR2271700A1 publication Critical patent/FR2271700A1/fr
Application granted granted Critical
Publication of FR2271700B1 publication Critical patent/FR2271700B1/fr
Granted 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

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Control Of Amplification And Gain Control (AREA)
FR7416617A 1974-05-14 1974-05-14 Variable gain amplifier for videophone - has amplifier transistor charged by field effect transistor with feedback loop Granted FR2271700A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR7416617A FR2271700A1 (en) 1974-05-14 1974-05-14 Variable gain amplifier for videophone - has amplifier transistor charged by field effect transistor with feedback loop

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7416617A FR2271700A1 (en) 1974-05-14 1974-05-14 Variable gain amplifier for videophone - has amplifier transistor charged by field effect transistor with feedback loop

Publications (2)

Publication Number Publication Date
FR2271700A1 true FR2271700A1 (en) 1975-12-12
FR2271700B1 FR2271700B1 (enExample) 1976-10-15

Family

ID=9138798

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7416617A Granted FR2271700A1 (en) 1974-05-14 1974-05-14 Variable gain amplifier for videophone - has amplifier transistor charged by field effect transistor with feedback loop

Country Status (1)

Country Link
FR (1) FR2271700A1 (enExample)

Also Published As

Publication number Publication date
FR2271700B1 (enExample) 1976-10-15

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Legal Events

Date Code Title Description
ST Notification of lapse