JPS56126304A - Gain compensating device - Google Patents

Gain compensating device

Info

Publication number
JPS56126304A
JPS56126304A JP3122280A JP3122280A JPS56126304A JP S56126304 A JPS56126304 A JP S56126304A JP 3122280 A JP3122280 A JP 3122280A JP 3122280 A JP3122280 A JP 3122280A JP S56126304 A JPS56126304 A JP S56126304A
Authority
JP
Japan
Prior art keywords
socket
resistance
gain
plug
amplifier
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.)
Pending
Application number
JP3122280A
Other languages
Japanese (ja)
Inventor
Sadayuki Kurosaki
Akio Sasaki
Hiroo Mafune
Seiji Nakama
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.)
Nippon Telegraph and Telephone Corp
Panasonic Mobile Communications Co Ltd
Original Assignee
Nippon Telegraph and Telephone Corp
Matsushita Communication Industrial Co 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 Nippon Telegraph and Telephone Corp, Matsushita Communication Industrial Co Ltd filed Critical Nippon Telegraph and Telephone Corp
Priority to JP3122280A priority Critical patent/JPS56126304A/en
Publication of JPS56126304A publication Critical patent/JPS56126304A/en
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03G—CONTROL OF AMPLIFICATION
    • H03G3/00—Gain control in amplifiers or frequency changers
    • H03G3/02—Manually-operated control
    • H03G3/04—Manually-operated control in untuned amplifiers

Landscapes

  • Control Of Amplification And Gain Control (AREA)

Abstract

PURPOSE:To simplify the circuit constitution with a reduction of number of component parts, by connecting the resistance which decides the gain of an amplifier to socket and then short-circuiting the area between the pins of the plug to be connected to the said resistance directly or via a resistance. CONSTITUTION:Both ends of the resistance which decides the gain of an amplifier are connected to a socket, and the area between the pins of a plug to be connected to the socket is short-circuited directly or via a resistance. For instance, both ends of the feedback resistances 5 and 6 of an operational amplifier 7 are connected to the microphone socket 3 as shown in the figure, and a short circuit is given to the area between the pins of the microphone plugs 1 and 2 to be connected to the socket 3. In case when the plug 1 is inserted into the socket 3, the gain G1 of the amplifier 7 is decided as G1=20logRA/Ri. Then the gain G2 is decided as G2=20logRB/Ri in case when the plug 2 is inserted into the socket 3 respectively.
JP3122280A 1980-03-11 1980-03-11 Gain compensating device Pending JPS56126304A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP3122280A JPS56126304A (en) 1980-03-11 1980-03-11 Gain compensating device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP3122280A JPS56126304A (en) 1980-03-11 1980-03-11 Gain compensating device

Publications (1)

Publication Number Publication Date
JPS56126304A true JPS56126304A (en) 1981-10-03

Family

ID=12325396

Family Applications (1)

Application Number Title Priority Date Filing Date
JP3122280A Pending JPS56126304A (en) 1980-03-11 1980-03-11 Gain compensating device

Country Status (1)

Country Link
JP (1) JPS56126304A (en)

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5122255U (en) * 1974-08-06 1976-02-18
JPS5183759A (en) * 1974-12-16 1976-07-22 United Technologies Corp

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5122255U (en) * 1974-08-06 1976-02-18
JPS5183759A (en) * 1974-12-16 1976-07-22 United Technologies Corp

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