GB1303928A - - Google Patents

Info

Publication number
GB1303928A
GB1303928A GB3852171A GB3852171A GB1303928A GB 1303928 A GB1303928 A GB 1303928A GB 3852171 A GB3852171 A GB 3852171A GB 3852171 A GB3852171 A GB 3852171A GB 1303928 A GB1303928 A GB 1303928A
Authority
GB
United Kingdom
Prior art keywords
signal
frequency
amplitude
carrier
aug
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.)
Expired
Application number
GB3852171A
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 filed Critical
Publication of GB1303928A publication Critical patent/GB1303928A/en
Expired 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
    • H03G3/3052—Automatic control in amplifiers having semiconductor devices in bandpass amplifiers (H.F. or I.F.) or in frequency-changers used in a (super)heterodyne receiver
    • H03G3/3073—Circuits generating control signals when no carrier is present, or in SSB, CW or pulse receivers
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03D—DEMODULATION OR TRANSFERENCE OF MODULATION FROM ONE CARRIER TO ANOTHER
    • H03D1/00—Demodulation of amplitude-modulated oscillations
    • H03D1/22—Homodyne or synchrodyne circuits
    • H03D1/24—Homodyne or synchrodyne circuits for demodulation of signals wherein one sideband or the carrier has been wholly or partially suppressed

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Digital Transmission Methods That Use Modulated Carrier Waves (AREA)
  • Circuits Of Receivers In General (AREA)
  • Superheterodyne Receivers (AREA)

Abstract

1303928 Radio receivers BLAUPUNKT WERKE GmbH 17 Aug 1971 [18 Aug 1970] 38521/71 Heading H3Q A receiver for a signal having at least a residual carrier comprises: a local oscillator 7 locked to the frequency of the residual carrier; a mixer 2 for heterodyning the received signal, e.g. from i.f. amplifier 1, with the local oscillator signal to derive an information frequency output, e.g. fed to low frequency stage 9, and a subinformation frequency output, e.g. across capacitor 11, whose amplitude is dependent on the carrier amplitude; and gain control means 13 responsive to the sub-information frequency signal for controlling the receiving gain. The gain control path also includes a switch 12 controlled by a level discriminator 14 which reduces the a.g.c. signal when double sideband full amplitude carrier signals are being received.
GB3852171A 1970-08-18 1971-08-17 Expired GB1303928A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19702040869 DE2040869A1 (en) 1970-08-18 1970-08-18 Circuit arrangement for automatic sharpening with single sideband reception with residual carrier

Publications (1)

Publication Number Publication Date
GB1303928A true GB1303928A (en) 1973-01-24

Family

ID=5780009

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3852171A Expired GB1303928A (en) 1970-08-18 1971-08-17

Country Status (4)

Country Link
AT (1) AT308833B (en)
DE (1) DE2040869A1 (en)
FR (1) FR2102337B3 (en)
GB (1) GB1303928A (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4161697A (en) * 1977-04-27 1979-07-17 Texas Instruments Incorporated Automatically clarifying radio receiver

Also Published As

Publication number Publication date
DE2040869A1 (en) 1972-03-02
FR2102337A3 (en) 1972-04-07
FR2102337B3 (en) 1974-05-10
AT308833B (en) 1973-07-25

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Legal Events

Date Code Title Description
PS Patent sealed
PLNP Patent lapsed through nonpayment of renewal fees