GB392456A - Improvements in or relating to radio television and like receiving systems - Google Patents

Improvements in or relating to radio television and like receiving systems

Info

Publication number
GB392456A
GB392456A GB32323/32A GB3232332A GB392456A GB 392456 A GB392456 A GB 392456A GB 32323/32 A GB32323/32 A GB 32323/32A GB 3232332 A GB3232332 A GB 3232332A GB 392456 A GB392456 A GB 392456A
Authority
GB
United Kingdom
Prior art keywords
signals
television
amplifier
detectors
sound
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
GB32323/32A
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.)
Marconis Wireless Telegraph Co Ltd
BAE Systems Electronics Ltd
Original Assignee
Marconis Wireless Telegraph Co Ltd
Marconi 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 Marconis Wireless Telegraph Co Ltd, Marconi Co Ltd filed Critical Marconis Wireless Telegraph Co Ltd
Publication of GB392456A publication Critical patent/GB392456A/en
Priority claimed from GB1037834A external-priority patent/GB437731A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N7/00—Television systems
    • H04N7/06—Systems for the simultaneous transmission of one television signal, i.e. both picture and sound, by more than one carrier
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B19/00—Single-purpose machines or devices for particular grinding operations not covered by any other main group
    • B24B19/08—Single-purpose machines or devices for particular grinding operations not covered by any other main group for grinding non-circular cross-sections, e.g. shafts of elliptical or polygonal cross-section
    • B24B19/11—Single-purpose machines or devices for particular grinding operations not covered by any other main group for grinding non-circular cross-sections, e.g. shafts of elliptical or polygonal cross-section for grinding the circumferential surface of rings, e.g. piston rings
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
    • H04B1/06—Receivers
    • H04B1/16—Circuits
    • H04B1/26—Circuits for superheterodyne receivers
    • 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
    • H04N5/60—Receiver circuitry for the reception of television signals according to analogue transmission standards for the sound signals

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Multimedia (AREA)
  • Mechanical Engineering (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Superheterodyne Receivers (AREA)
  • Magnetic Resonance Imaging Apparatus (AREA)

Abstract

392,456. Television. MARCONI'S WIRELESS TELEGRAPH CO., Ltd., Marconi House, Strand, London.-(Assignees of Carlson, W. La V. ; Haddonfield Manor Apartments, Haddonfield, New Jersey, U.S.A.) Nov. 15, 1932, No. 32323. Convention date, Dec. 26, 1931. [Class 40 (v).] Television and sound signals are transmitted on neighbouring carrier frequencies, for example 50,000 and 51,000 kilocycles, and are received by superheterodyne circuits. The tuning circuits 35, 36 of a high-frequency amplifier 11 are sufficiently damped to receive both carrier frequencies, and are ganged with the tuning circuit 37 of a local oscillator 14. The signals are passed through detectors 12, 13 to intermediate frequency amplifiers A, B tuned respectively to the sound and television signals. The sound signals are removed from. the tele- , vision amplifier by acceptor circuits 20a, 23a. All the television signals are passed by a detector 24 to control the emission in a cathoderay tube 26, but detectors 23, 25 are biased to respond only to the peaks of the horizontal and vertical scanning frequencies respectively. Potentiometers 32, 33, 34 control the outputs from the detectors. A gain-regulating valve 39 applies a variable grid bias to the first valve 20 in the intermediate amplifier B, and may also control the grid bias of the first valve 15 of the amplifier A in place of a potentiometer 15a. According to modifications : two heterodyne stages are used for each set of signals, Fig. 2 (not shown) ; separate carrier frequencies are used for the sound signals, the television signals and the two synchronizing signals, Fig. 3 (not shown) ; a common second detector is used for the television and synchronizing signals, Fig. 4 (not shown).
GB32323/32A 1931-12-26 1932-11-15 Improvements in or relating to radio television and like receiving systems Expired GB392456A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US392456XA 1931-12-26 1931-12-26
GB1037834A GB437731A (en) 1934-04-05 1934-04-05 Improvements in and relating to wireless and like apparatus for the reception of modulated carrier oscillations

Publications (1)

Publication Number Publication Date
GB392456A true GB392456A (en) 1933-05-18

Family

ID=31889695

Family Applications (1)

Application Number Title Priority Date Filing Date
GB32323/32A Expired GB392456A (en) 1931-12-26 1932-11-15 Improvements in or relating to radio television and like receiving systems

Country Status (3)

Country Link
BE (1) BE393258A (en)
FR (1) FR743694A (en)
GB (1) GB392456A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2188501A (en) * 1986-03-27 1987-09-30 Rca Corp Agc in a system for processing a video and sound signal
GB2229877A (en) * 1989-03-08 1990-10-03 Toshiba Kk Video intermediate frequency processing circuit

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE757910C (en) * 1938-08-10 1954-11-22 Opta Radio A G The use of one or more resonance circuits, tuned to the audio frequency band and, if necessary, its harmonics, in the screen grid line of the image amplifier of a television receiver

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2188501A (en) * 1986-03-27 1987-09-30 Rca Corp Agc in a system for processing a video and sound signal
GB2188501B (en) * 1986-03-27 1990-08-22 Rca Corp Agc in a system for processing a video and sound signal
GB2229877A (en) * 1989-03-08 1990-10-03 Toshiba Kk Video intermediate frequency processing circuit
GB2229877B (en) * 1989-03-08 1993-09-01 Toshiba Kk Video intermediate frequency processing circuit

Also Published As

Publication number Publication date
BE393258A (en)
FR743694A (en) 1933-04-03

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