GB884456A - Improvements in or relating to circuit arrangements for varying the picture definition in single side band television receiving apparatus - Google Patents

Improvements in or relating to circuit arrangements for varying the picture definition in single side band television receiving apparatus

Info

Publication number
GB884456A
GB884456A GB584958A GB584958A GB884456A GB 884456 A GB884456 A GB 884456A GB 584958 A GB584958 A GB 584958A GB 584958 A GB584958 A GB 584958A GB 884456 A GB884456 A GB 884456A
Authority
GB
United Kingdom
Prior art keywords
response
side band
single side
tuned
band television
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
GB584958A
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.)
Telefunken AG
Original Assignee
Telefunken AG
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 Telefunken AG filed Critical Telefunken AG
Publication of GB884456A publication Critical patent/GB884456A/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
    • H04N5/4446—IF amplifier circuits specially adapted for B&W TV

Landscapes

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

Abstract

884,456. Valve circuits for radio reception. TELEFUNKEN G.m.b.H. Feb. 24, 1958 [Feb. 23, 1957], No. 5849/58. Classes 40(5) and 40(6). The response of a single side band television receiver is varied by means of a direct-current controlled reactance. This may comprise a condenser 9 in series with a rectifier 10 whose resistance is varied by the D.C. potential applied to it from potentiometer 12, via H.F. filter 11. The variable reactance is shunted across the secondary of an I.F. tuned transformer 3 which as shown comprises a single tuned circuit, but which in another embodiment (Fig. 4, not shown) comprises a bandpass pair. In a further embodiment (Fig. 6, not shown) a parallel-tuned is shunted across the rectifier, automatic control of response in accordance with the signal level being obtained, since the diode rectifies and is biased by the I.F. voltage appearing across it. The arrangement may alternatively be used to vary the video response, being connected in shunt to the input to the video amplifier (Fig. 5, not shown). The Specification also refers to the use of alternative D.C. controllable devices, e.g. voltage sensitive condensers, current or temperature sensitive resistors, ferrite cores, or thermionic valves.
GB584958A 1957-02-23 1958-02-24 Improvements in or relating to circuit arrangements for varying the picture definition in single side band television receiving apparatus Expired GB884456A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DET13265A DE1028164B (en) 1957-02-23 1957-02-23 Circuit arrangement for changing the image impression in television receivers with single sideband transmission

Publications (1)

Publication Number Publication Date
GB884456A true GB884456A (en) 1961-12-13

Family

ID=7547277

Family Applications (1)

Application Number Title Priority Date Filing Date
GB584958A Expired GB884456A (en) 1957-02-23 1958-02-24 Improvements in or relating to circuit arrangements for varying the picture definition in single side band television receiving apparatus

Country Status (2)

Country Link
DE (1) DE1028164B (en)
GB (1) GB884456A (en)

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH249520A (en) * 1941-08-14 1947-06-30 Philips Nv Method and device for transmitting images.

Also Published As

Publication number Publication date
DE1028164B (en) 1958-04-17

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