FR2417900A1 - Oscillator-modulator circuit for TV game - has two transistor oscillators each contg. LC circuit and connected to ring modulator - Google Patents

Oscillator-modulator circuit for TV game - has two transistor oscillators each contg. LC circuit and connected to ring modulator

Info

Publication number
FR2417900A1
FR2417900A1 FR7804894A FR7804894A FR2417900A1 FR 2417900 A1 FR2417900 A1 FR 2417900A1 FR 7804894 A FR7804894 A FR 7804894A FR 7804894 A FR7804894 A FR 7804894A FR 2417900 A1 FR2417900 A1 FR 2417900A1
Authority
FR
France
Prior art keywords
oscillator
circuit
carrier
modulator
signal
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.)
Withdrawn
Application number
FR7804894A
Other languages
French (fr)
Inventor
Jean-Pierre Fuster
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.)
Thomson-Brandt SA
Original Assignee
Thomson-Brandt SA
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 Thomson-Brandt SA filed Critical Thomson-Brandt SA
Priority to FR7804894A priority Critical patent/FR2417900A1/en
Publication of FR2417900A1 publication Critical patent/FR2417900A1/en
Withdrawn legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N5/00—Details of television systems
    • H04N5/38—Transmitter circuitry for the transmission of television signals according to analogue transmission standards
    • H04N5/40—Modulation circuits
    • A—HUMAN NECESSITIES
    • A63—SPORTS; GAMES; AMUSEMENTS
    • A63F—CARD, BOARD, OR ROULETTE GAMES; INDOOR GAMES USING SMALL MOVING PLAYING BODIES; VIDEO GAMES; GAMES NOT OTHERWISE PROVIDED FOR
    • A63F13/00—Video games, i.e. games using an electronically generated display having two or more dimensions
    • A63F13/30—Interconnection arrangements between game servers and game devices; Interconnection arrangements between game devices; Interconnection arrangements between game servers
    • A63F13/33—Interconnection arrangements between game servers and game devices; Interconnection arrangements between game devices; Interconnection arrangements between game servers using wide area network [WAN] connections
    • A63F13/338—Interconnection arrangements between game servers and game devices; Interconnection arrangements between game devices; Interconnection arrangements between game servers using wide area network [WAN] connections using television networks
    • A—HUMAN NECESSITIES
    • A63—SPORTS; GAMES; AMUSEMENTS
    • A63F—CARD, BOARD, OR ROULETTE GAMES; INDOOR GAMES USING SMALL MOVING PLAYING BODIES; VIDEO GAMES; GAMES NOT OTHERWISE PROVIDED FOR
    • A63F2300/00—Features of games using an electronically generated display having two or more dimensions, e.g. on a television screen, showing representations related to the game
    • A63F2300/40—Features of games using an electronically generated display having two or more dimensions, e.g. on a television screen, showing representations related to the game characterised by details of platform network
    • A63F2300/409—Data transfer via television network

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Amplitude Modulation (AREA)

Abstract

The oscillator-modulator circuit has a first oscillator (1) which generates a video carrier at frequency F1 typically 600 MHz and a second oscillator (3) which generates a sub-carrier signal at frequency DELTA F = +- (F1-F2). F2 is the sound carrier frequency. A ring modulator (2) modulates the video carrier with the video signal and the sub-carrier to provide an HF signal S which is applied to the television aerial input. The sub-carrier is modulated by sound signal BF. The use of a sub-carrier provides for greater signal stability and avoids use of expensive oscillator components.
FR7804894A 1978-02-21 1978-02-21 Oscillator-modulator circuit for TV game - has two transistor oscillators each contg. LC circuit and connected to ring modulator Withdrawn FR2417900A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR7804894A FR2417900A1 (en) 1978-02-21 1978-02-21 Oscillator-modulator circuit for TV game - has two transistor oscillators each contg. LC circuit and connected to ring modulator

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7804894A FR2417900A1 (en) 1978-02-21 1978-02-21 Oscillator-modulator circuit for TV game - has two transistor oscillators each contg. LC circuit and connected to ring modulator

Publications (1)

Publication Number Publication Date
FR2417900A1 true FR2417900A1 (en) 1979-09-14

Family

ID=9204837

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7804894A Withdrawn FR2417900A1 (en) 1978-02-21 1978-02-21 Oscillator-modulator circuit for TV game - has two transistor oscillators each contg. LC circuit and connected to ring modulator

Country Status (1)

Country Link
FR (1) FR2417900A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2573600A1 (en) * 1984-11-20 1986-05-23 Radiotechnique Sa TELEVISION SIGNAL MODULATOR CIRCUIT

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2516009A (en) * 1948-10-28 1950-07-18 Westinghouse Electric Corp Converter system
FR2198330A1 (en) * 1972-08-31 1974-03-29 Rca Corp
FR2198331A1 (en) * 1972-08-31 1974-03-29 Rca Corp

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2516009A (en) * 1948-10-28 1950-07-18 Westinghouse Electric Corp Converter system
FR2198330A1 (en) * 1972-08-31 1974-03-29 Rca Corp
FR2198331A1 (en) * 1972-08-31 1974-03-29 Rca Corp

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
NV202/71 *
NV8032/76 *

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2573600A1 (en) * 1984-11-20 1986-05-23 Radiotechnique Sa TELEVISION SIGNAL MODULATOR CIRCUIT
EP0182425A1 (en) * 1984-11-20 1986-05-28 La Radiotechnique Portenseigne Modulating circuit of television signals

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Legal Events

Date Code Title Description
ST Notification of lapse