JPS56726A - Intermediate frequency amplifier of am/fm - Google Patents

Intermediate frequency amplifier of am/fm

Info

Publication number
JPS56726A
JPS56726A JP7581879A JP7581879A JPS56726A JP S56726 A JPS56726 A JP S56726A JP 7581879 A JP7581879 A JP 7581879A JP 7581879 A JP7581879 A JP 7581879A JP S56726 A JPS56726 A JP S56726A
Authority
JP
Japan
Prior art keywords
amplifier
terminal
input
fmif
gain control
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
JP7581879A
Other languages
Japanese (ja)
Other versions
JPS6352485B2 (en
Inventor
Masami Miura
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.)
NEC Corp
Original Assignee
NEC Corp
Nippon Electric 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 NEC Corp, Nippon Electric Co Ltd filed Critical NEC Corp
Priority to JP7581879A priority Critical patent/JPS56726A/en
Publication of JPS56726A publication Critical patent/JPS56726A/en
Publication of JPS6352485B2 publication Critical patent/JPS6352485B2/ja
Granted legal-status Critical Current

Links

Classifications

    • 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

Landscapes

  • Control Of Amplification And Gain Control (AREA)
  • Amplifiers (AREA)

Abstract

PURPOSE:To enable to avoid mutual interference and to make stable DC level without using transformer load, by providing the differential pair amplifier with the FM intermediate amplifier and providing the gain control with the AM intermediate amplifier. CONSTITUTION:Transistors TR10, 11 constitute a differential amplifier, the FM input signal input to the terminal B is output from the terminal D via the resistor 12 and delivered to the next stage amplifier 13. In case of operation as FM intermediate frequency amplifier FMIF, the input circuit of the AM input terminal A is interrupted to avoid the AM input signal to the terminal A and to set the voltage at the gain control input terminal E almost near zero as the base bias of TR18 the emitter of which is commonly connected to the emitter of TR10, 11. Accordingly, the desired FMIF characteristics can be drawn out without being affected with the operation and performance of FMIF with the gain control circuit consisting of TR17-20 constituting the AM intermediate frequency amplifier AMIF and the resistor 21.
JP7581879A 1979-06-15 1979-06-15 Intermediate frequency amplifier of am/fm Granted JPS56726A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP7581879A JPS56726A (en) 1979-06-15 1979-06-15 Intermediate frequency amplifier of am/fm

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP7581879A JPS56726A (en) 1979-06-15 1979-06-15 Intermediate frequency amplifier of am/fm

Publications (2)

Publication Number Publication Date
JPS56726A true JPS56726A (en) 1981-01-07
JPS6352485B2 JPS6352485B2 (en) 1988-10-19

Family

ID=13587137

Family Applications (1)

Application Number Title Priority Date Filing Date
JP7581879A Granted JPS56726A (en) 1979-06-15 1979-06-15 Intermediate frequency amplifier of am/fm

Country Status (1)

Country Link
JP (1) JPS56726A (en)

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5062318A (en) * 1973-10-02 1975-05-28

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5062318A (en) * 1973-10-02 1975-05-28

Also Published As

Publication number Publication date
JPS6352485B2 (en) 1988-10-19

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