GB903011A - Arrangement for varying the absorption characteristic of an oscillatory circuit - Google Patents

Arrangement for varying the absorption characteristic of an oscillatory circuit

Info

Publication number
GB903011A
GB903011A GB764760A GB764760A GB903011A GB 903011 A GB903011 A GB 903011A GB 764760 A GB764760 A GB 764760A GB 764760 A GB764760 A GB 764760A GB 903011 A GB903011 A GB 903011A
Authority
GB
United Kingdom
Prior art keywords
sound
amplifier
march
switched
valve
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
GB764760A
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.)
Loewe Opta GmbH
Original Assignee
Loewe Opta GmbH
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 Loewe Opta GmbH filed Critical Loewe Opta GmbH
Publication of GB903011A publication Critical patent/GB903011A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N5/00—Details of television systems
    • H04N5/44—Receiver circuitry for the reception of television signals according to analogue transmission standards
    • H04N5/46—Receiver circuitry for the reception of television signals according to analogue transmission standards for receiving on more than one standard at will

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Television Receiver Circuits (AREA)

Abstract

903,011. Radio-receiving circuits; multiplex radio signalling. LOEWE OPTA A.G. March 4, 1960 [March 11, 1959], No. 7647/60. Class 40 (5). In a television receiver which can be switched for different systems, in particular for a system employing amplitude modulation for sound and alternatively the intercarrier system using frequency modulation for sound, means are provided to vary the sensitivity of the sound channel when receiving different systems. Tuning head 1 includes a frequency changer which feeds video I.F. amplifier 4 and also a branched sound I.F. amplifier 5 for amplitude modulated sound. When switched for a system employing intercarrier sound, in which the valve 4 also forms a sound channel amplifier, the absorption produced by the A.M. soundchannel tuned circuit 7, 8 is reduced by running the valve 5 into grid current. This is done by switching its grid leak-normally connected to a gain control voltage-to connect to the H.T.+ supply.
GB764760A 1959-03-11 1960-03-04 Arrangement for varying the absorption characteristic of an oscillatory circuit Expired GB903011A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEL32686A DE1212988B (en) 1959-03-11 1959-03-11 Multi-standard television receiver for the optional reception of programs with amplitude-modulated or frequency-modulated accompanying audio signals

Publications (1)

Publication Number Publication Date
GB903011A true GB903011A (en) 1962-08-09

Family

ID=7266004

Family Applications (1)

Application Number Title Priority Date Filing Date
GB764760A Expired GB903011A (en) 1959-03-11 1960-03-04 Arrangement for varying the absorption characteristic of an oscillatory circuit

Country Status (4)

Country Link
BE (1) BE588334A (en)
DE (1) DE1212988B (en)
FR (1) FR1250328A (en)
GB (1) GB903011A (en)

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2262707A (en) * 1936-02-12 1941-11-11 Hazeltine Corp Adjustable band-pass selector
DE905377C (en) * 1951-08-05 1954-03-01 Siemens Ag Television receiver based on the differential carrier method with gain control circuit
BE526740A (en) * 1953-02-24
BE543051A (en) * 1954-12-28

Also Published As

Publication number Publication date
FR1250328A (en) 1961-01-06
DE1212988B (en) 1966-03-24
BE588334A (en) 1960-09-05

Similar Documents

Publication Publication Date Title
GB1025895A (en) A circuit arrangement for the connection of a video-signal producer to a television receiver
ES454022A1 (en) Video record player switching system
US3795762A (en) Plural operating mode television receivers
ES468715A1 (en) Circuit for producing a periodic parabolic signal
GB916147A (en) Television system
GB702627A (en) Colour television receivers
GB903011A (en) Arrangement for varying the absorption characteristic of an oscillatory circuit
GB634374A (en) Improvements in broadcasting systems
KR960008728B1 (en) High frequency switching circuit of vcr
DE3162161D1 (en) Television receiver with a sound channel operating with the carriers-difference system
GB896688A (en) Improvements in or relating to frequency discriminators
GB883883A (en) Automatic control system of local oscillation frequency
GB957047A (en) Improvements relating to circuit arrangements for separating electrical signals, especially applicable to television receivers
GB1267878A (en) Plural operating mode television receivers
GB674254A (en) Electric carrier wave signalling systems and apparatus
GB764360A (en) Tuning indication for intercarrier television receivers
JPH0461980U (en)
GB803620A (en) Improvements in or relating to television and sound broadcast receivers
GB1234186A (en)
JPS635794U (en)
GB1430273A (en) Arrangement for diversity reception
GB861187A (en) Television receiver tuning system
ES403045A1 (en) Device for tuning television receivers. (Machine-translation by Google Translate, not legally binding)
ES259368A3 (en) Some improvements in receiving television devices (Machine-translation by Google Translate, not legally binding)
JPS5382112A (en) Automatic control circuit for local oscillating frequency