[go: up one dir, main page]

GB1391477A - Synchronizing television line deflection - Google Patents

Synchronizing television line deflection

Info

Publication number
GB1391477A
GB1391477A GB1909672A GB1909672A GB1391477A GB 1391477 A GB1391477 A GB 1391477A GB 1909672 A GB1909672 A GB 1909672A GB 1909672 A GB1909672 A GB 1909672A GB 1391477 A GB1391477 A GB 1391477A
Authority
GB
United Kingdom
Prior art keywords
wave
flyback pulse
transistor
base
charging
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
GB1909672A
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.)
Philips Electronics UK Ltd
Original Assignee
Philips Electronic and Associated Industries 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
Priority claimed from DE19712120772 external-priority patent/DE2120772C3/en
Application filed by Philips Electronic and Associated Industries Ltd filed Critical Philips Electronic and Associated Industries Ltd
Publication of GB1391477A publication Critical patent/GB1391477A/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
    • H04N5/04—Synchronising
    • H04N5/12—Devices in which the synchronising signals are only operative if a phase difference occurs between synchronising and synchronised scanning devices, e.g. flywheel synchronising
    • H04N5/126—Devices in which the synchronising signals are only operative if a phase difference occurs between synchronising and synchronised scanning devices, e.g. flywheel synchronising whereby the synchronisation signal indirectly commands a frequency generator
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03K—PULSE TECHNIQUE
    • H03K4/00—Generating pulses having essentially a finite slope or stepped portions
    • H03K4/06—Generating pulses having essentially a finite slope or stepped portions having triangular shape
    • H03K4/08—Generating pulses having essentially a finite slope or stepped portions having triangular shape having sawtooth shape
    • H03K4/48—Generating pulses having essentially a finite slope or stepped portions having triangular shape having sawtooth shape using as active elements semiconductor devices
    • H03K4/50—Generating pulses having essentially a finite slope or stepped portions having triangular shape having sawtooth shape using as active elements semiconductor devices in which a sawtooth voltage is produced across a capacitor

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Details Of Television Scanning (AREA)
  • Discharge-Lamp Control Circuits And Pulse- Feed Circuits (AREA)
  • Synchronizing For Television (AREA)

Abstract

1391477 Sawtooth wave generating circuits; synchronizing television time bars PHILIPS ELECTRONIC & ASSOCIATED INDUSTRIES Ltd 25 April 1972 [28 April 1971] 19096/72 Headings H3A and H3T A sawtooth generator comprises means 12 for charging a capacitor, means 8 for discharging the capacitor in response to amplitude limited pulses derived from the flyback pulse C of a television line time-base and means for controlling the charge current to maintain the mean amplitude of sawtooth waves constant. The circuit described is for generating the comparison wave for the AFC circuit of the line time-base and it is explained that clipping the flyback pulse and stabilizing the mean level removes jitter due to flyback pulse height and width variations. The mean level is controlled in the circuit shown by comparing a reference voltage at the base of transistor 14 with the mean level of the wave desired from the wave by a filter 19-22. The resulting voltage across 13 controls the charging transistor 12. The flyback pulse may also be applied to a transistor 26 to cut-off the charging current during the flyback.
GB1909672A 1971-04-28 1972-04-25 Synchronizing television line deflection Expired GB1391477A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19712120772 DE2120772C3 (en) 1971-04-28 Circuit arrangement for synchronizing the line deflection of a television receiver

Publications (1)

Publication Number Publication Date
GB1391477A true GB1391477A (en) 1975-04-23

Family

ID=5806173

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1909672A Expired GB1391477A (en) 1971-04-28 1972-04-25 Synchronizing television line deflection

Country Status (8)

Country Link
JP (1) JPS5242329B1 (en)
AT (1) AT314629B (en)
AU (1) AU462000B2 (en)
ES (2) ES402047A1 (en)
FR (1) FR2134637B1 (en)
GB (1) GB1391477A (en)
IT (1) IT952768B (en)
NL (1) NL7205484A (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2511642C3 (en) * 1975-03-17 1980-09-11 Siemens Ag, 1000 Berlin Und 8000 Muenchen Circuit arrangement for regulating the amplitude of a sawtooth generator

Also Published As

Publication number Publication date
AU462000B2 (en) 1975-06-12
AU4148972A (en) 1973-11-01
IT952768B (en) 1973-07-30
DE2120772A1 (en) 1972-11-09
ES402127A1 (en) 1975-03-01
FR2134637A1 (en) 1972-12-08
AT314629B (en) 1974-04-10
NL7205484A (en) 1972-10-31
JPS5242329B1 (en) 1977-10-24
DE2120772B2 (en) 1977-02-10
FR2134637B1 (en) 1978-09-29
ES402047A1 (en) 1975-12-01

Similar Documents

Publication Publication Date Title
GB1497604A (en) Synchronising-pulse separator circuits
US3909695A (en) Regulation and stabilization in a switching power supply
US4686432A (en) Vertical deflection circuit for electron beams in picture tubes
US3577012A (en) Circuit for controlling frequency with voltage
US3497725A (en) Monostable multivibrator
ES464272A1 (en) Horizontal deflection circuit with timing correction
GB1568271A (en) Reference signal generators
GB1527023A (en) Apparatus for modifying the time base of a signal
GB1391477A (en) Synchronizing television line deflection
GB1370074A (en) Television line oscillators
GB1286354A (en) A d.c. voltage converter with stabilised output voltage
US3013219A (en) Transistor blocking oscillator using resonant frequency stabilization
US3502935A (en) Transistor deflection circuits
GB1245648A (en) Method of regulation of the duration of a repeated rectangular electric control signal and device for carrying out this method
US4547710A (en) Cathode ray tube display horizontal deflection system with delay compensation
GB1243437A (en) Video signal identification circuit
CA1099402A (en) Retrace blanking pulse generator with delayed transition
GB1479037A (en) Sawtooth and parabolic signal generator
US2469227A (en) Electronic wave generating method and means
US3784872A (en) Scan deflection circuit device
JPS585536B2 (en) Circuit arrangement for synchronizing output signals according to periodic pulse input signals
GB1276278A (en) Frequency divider
US3144581A (en) Frequency divider for video systems empolying blocking oscillator utilizing reverse breakdown diode in feedback circuit
GB1490928A (en) Circuit arrangement for television receiving equipment
GB1362868A (en) Motor control system with compensation for low-frequency varia tions in motor energizing voltage

Legal Events

Date Code Title Description
PS Patent sealed
PCNP Patent ceased through non-payment of renewal fee