IT1034825B - AM-FM demodulator for superheterodyne receiver - has two frequency modulation systems and selective limiter of regenerative type - Google Patents

AM-FM demodulator for superheterodyne receiver - has two frequency modulation systems and selective limiter of regenerative type

Info

Publication number
IT1034825B
IT1034825B IT2197675A IT2197675A IT1034825B IT 1034825 B IT1034825 B IT 1034825B IT 2197675 A IT2197675 A IT 2197675A IT 2197675 A IT2197675 A IT 2197675A IT 1034825 B IT1034825 B IT 1034825B
Authority
IT
Italy
Prior art keywords
amplifier
filter
demodulator
output
frequency modulation
Prior art date
Application number
IT2197675A
Other languages
Italian (it)
Original Assignee
Gen Electric
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 Gen Electric filed Critical Gen Electric
Application granted granted Critical
Publication of IT1034825B publication Critical patent/IT1034825B/en

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Landscapes

  • Circuits Of Receivers In General (AREA)
  • Superheterodyne Receivers (AREA)

Abstract

The frequency modulated demodulator has two input signals which have the same nominal central frequency. It comprises an FM-filter (18) and transistor pairs (Q1, Q2) (Q8, Q8) and non-inverting different amplifiers with an output amplifying amplifier (Q10) in the emitter line. These circuits set a series of pulses of variable time. Each of the emitters of the input transistors is connected with an constant current source of about 130 muA. Output from the filter is rectified by diodes (D4D5) before amplification and transmission to the audio amplifier. The AM stage of the heterodyne system similarly includes an AM filter transistor amplifier and output amplifier. The combined system an AM-FM converter with AFC and ACC.
IT2197675A 1974-04-04 1975-04-03 AM-FM demodulator for superheterodyne receiver - has two frequency modulation systems and selective limiter of regenerative type IT1034825B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US45790874A 1974-04-04 1974-04-04

Publications (1)

Publication Number Publication Date
IT1034825B true IT1034825B (en) 1979-10-10

Family

ID=23818545

Family Applications (1)

Application Number Title Priority Date Filing Date
IT2197675A IT1034825B (en) 1974-04-04 1975-04-03 AM-FM demodulator for superheterodyne receiver - has two frequency modulation systems and selective limiter of regenerative type

Country Status (3)

Country Link
HK (3) HK42080A (en)
IE (1) IE42213B1 (en)
IT (1) IT1034825B (en)

Also Published As

Publication number Publication date
IE42213B1 (en) 1980-07-02
HK43180A (en) 1980-08-22
HK42080A (en) 1980-08-15
HK42180A (en) 1980-08-15
IE42213L (en) 1975-10-04

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