GB1090882A - Improvements in and relating to timebase frequency control in television receivers - Google Patents

Improvements in and relating to timebase frequency control in television receivers

Info

Publication number
GB1090882A
GB1090882A GB609465A GB609465A GB1090882A GB 1090882 A GB1090882 A GB 1090882A GB 609465 A GB609465 A GB 609465A GB 609465 A GB609465 A GB 609465A GB 1090882 A GB1090882 A GB 1090882A
Authority
GB
United Kingdom
Prior art keywords
diode
capacity
oscillator
circuit
feb
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
GB609465A
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.)
Blaupunkt Werke GmbH
Original Assignee
Blaupunkt Werke 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 Blaupunkt Werke GmbH filed Critical Blaupunkt Werke GmbH
Publication of GB1090882A publication Critical patent/GB1090882A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03K—PULSE TECHNIQUE
    • H03K3/00—Circuits for generating electric pulses; Monostable, bistable or multistable circuits
    • H03K3/02—Generators characterised by the type of circuit or by the means used for producing pulses
    • H03K3/26—Generators characterised by the type of circuit or by the means used for producing pulses by the use, as active elements, of bipolar transistors with internal or external positive feedback
    • 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
    • H03K4/60—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 current is produced through an inductor
    • H03K4/62—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 current is produced through an inductor using a semiconductor device operating as a switching device
    • H03K4/64—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 current is produced through an inductor using a semiconductor device operating as a switching device combined with means for generating the driving pulses
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03L—AUTOMATIC CONTROL, STARTING, SYNCHRONISATION OR STABILISATION OF GENERATORS OF ELECTRONIC OSCILLATIONS OR PULSES
    • H03L5/00—Automatic control of voltage, current, or power
    • 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

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Inductance-Capacitance Distribution Constants And Capacitance-Resistance Oscillators (AREA)
  • Television Receiver Circuits (AREA)

Abstract

1,090,882. Automatic phase control systems. BLAUPUNKT-WERKE G.m.b.H. Feb. 12, 1965 [Feb. 15, 1964], No. 6094/65. Heading H3A. A television receiver sine-wave line oscillator 10 is frequency and phase controlled by the D.C. output of a phase detector 1 applied to a back biased variable capacity diode 4 shunting the frequency determining tuned circuit 8 of the oscillator and a limiter diode 14 is also connected across the timed circuit to clip and prevent the generated sine wave exceeding a voltage which would render the capacity diode 4 forwardly conductive. Thus, a small back bias, producing maximum capacity, and capacity variation, may be applied to the diode 4. Further, the diode 4 may be series connected as shown with an auto-transforming coil 18 extending from the tuning coil so that the effect of diode 4 on the tuning control is enhanced. The sine wave oscillator is connected through a parallel connection R.C. circuit 20 to the base of a driver transistor 21 driving a line output stage.
GB609465A 1964-02-15 1965-02-12 Improvements in and relating to timebase frequency control in television receivers Expired GB1090882A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEB75449A DE1222534B (en) 1964-02-15 1964-02-15 Circuit arrangement for generating the line deflection voltage of a television receiver

Publications (1)

Publication Number Publication Date
GB1090882A true GB1090882A (en) 1967-11-15

Family

ID=6978661

Family Applications (1)

Application Number Title Priority Date Filing Date
GB609465A Expired GB1090882A (en) 1964-02-15 1965-02-12 Improvements in and relating to timebase frequency control in television receivers

Country Status (3)

Country Link
DE (1) DE1222534B (en)
FR (1) FR1423480A (en)
GB (1) GB1090882A (en)

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL269766A (en) * 1960-09-30

Also Published As

Publication number Publication date
FR1423480A (en) 1966-01-03
DE1222534B (en) 1966-08-11

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