GB589439A - Improvements in and relating to sawtooth oscillation generators - Google Patents

Improvements in and relating to sawtooth oscillation generators

Info

Publication number
GB589439A
GB589439A GB16954/44A GB1695444A GB589439A GB 589439 A GB589439 A GB 589439A GB 16954/44 A GB16954/44 A GB 16954/44A GB 1695444 A GB1695444 A GB 1695444A GB 589439 A GB589439 A GB 589439A
Authority
GB
United Kingdom
Prior art keywords
grid
valve
control grid
section
capacitor
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
GB16954/44A
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.)
Mullard Radio Valve Co Ltd
Original Assignee
Mullard Radio Valve 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 Mullard Radio Valve Co Ltd filed Critical Mullard Radio Valve Co Ltd
Publication of GB589439A publication Critical patent/GB589439A/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
    • 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
    • H03K4/10—Generating pulses having essentially a finite slope or stepped portions having triangular shape having sawtooth shape using as active elements vacuum tubes only
    • H03K4/12—Generating pulses having essentially a finite slope or stepped portions having triangular shape having sawtooth shape using as active elements vacuum tubes only in which a sawtooth voltage is produced across a capacitor
    • H03K4/16—Generating pulses having essentially a finite slope or stepped portions having triangular shape having sawtooth shape using as active elements vacuum tubes only in which a sawtooth voltage is produced across a capacitor using a single tube with positive feedback through transformer, e.g. blocking oscillator
    • 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
    • H04N5/123—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 directly commands a frequency generator

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Power Engineering (AREA)
  • Lasers (AREA)
  • Details Of Television Scanning (AREA)
  • Amplifiers (AREA)
  • Particle Accelerators (AREA)

Abstract

589,439. Saw-tooth waveformgenerators. MULLARD RADIO VALVE CQ., Ltd., and SPOONER, A. M. Sept. 5, 1944, No. 16954. [Class 40 (v)] A saw-tooth generator of the blocking oscillator type is combined with a multi-electrode valve which displays a negative resistance characteristic, has synchronizing pulses applied to the first control grid and has the second control and screen grids coupled to the control grid of the blocking oscillator, the screen grid coupling comprising a small capacitor. The Figure shows a blocking oscillator triode section 1 in which capacitor 9 charges slowly through resistor 8 while grid 3 remains below cut-off and discharges rapidly through the valve when a blocked oscillation occurs. Screen grids 15, 16 of the hexode section are coupled to the second control grid 2 by means of a small capacitor 18 and grid 2 is connected internally to control grid 3 of the triode section. A positive synchronizing pulse at grid 10 produces a very steep wavefront at grids 2, 3 by cumulative transitron action which intensifies the blocked oscillations in the triode section and causes a more rapid discharge of capacitor 9. The hexode section may be replaced by a separate pentode valve and its control grid may be biassed to cut-off.
GB16954/44A 1944-09-05 1944-09-05 Improvements in and relating to sawtooth oscillation generators Expired GB589439A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB263444X 1944-09-05
GB21045X 1945-10-02

Publications (1)

Publication Number Publication Date
GB589439A true GB589439A (en) 1947-06-20

Family

ID=26237257

Family Applications (1)

Application Number Title Priority Date Filing Date
GB16954/44A Expired GB589439A (en) 1944-09-05 1944-09-05 Improvements in and relating to sawtooth oscillation generators

Country Status (6)

Country Link
US (1) US2527462A (en)
BE (1) BE482007A (en)
CH (1) CH263444A (en)
DE (1) DE814495C (en)
FR (1) FR959757A (en)
GB (1) GB589439A (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE958744C (en) * 1951-11-30 1957-02-21 Sueddeutsche Telefon App Kabel Self-locking vibration generator synchronized by pulses
US2787707A (en) * 1953-06-16 1957-04-02 Gen Electric Pulse generators

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE881705C (en) * 1937-04-24 1953-07-02 Telefunken Gmbh Circuit arrangement for generating a constant waveform of the relaxation oscillations in externally controlled multivibrators
GB510531A (en) * 1938-02-02 1939-08-02 Baird Television Ltd Improvements in or relating to the synchronisation of oscillation generators
DE896831C (en) * 1940-03-14 1953-11-16 Fernseh Gmbh Tilting device with inductive coupling and a synchronizing tube
US2363822A (en) * 1941-01-02 1944-11-28 Rca Corp Saw-tooth deflection
US2297742A (en) * 1941-07-15 1942-10-06 Du Mont Allen B Lab Inc Blocking tube oscillator for television

Also Published As

Publication number Publication date
DE814495C (en) 1951-09-24
BE482007A (en)
CH263444A (en) 1949-08-31
FR959757A (en) 1950-04-05
US2527462A (en) 1950-10-24

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