GB748460A - Improvements in or relating to circuit arrangements for generating sawtooth currents - Google Patents

Improvements in or relating to circuit arrangements for generating sawtooth currents

Info

Publication number
GB748460A
GB748460A GB1982753A GB1982753A GB748460A GB 748460 A GB748460 A GB 748460A GB 1982753 A GB1982753 A GB 1982753A GB 1982753 A GB1982753 A GB 1982753A GB 748460 A GB748460 A GB 748460A
Authority
GB
United Kingdom
Prior art keywords
valve
driver
damping
bias
sawtooth
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
GB1982753A
Inventor
Ronald Joseph Boddy
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.)
EMI Ltd
Electrical and Musical Industries Ltd
Original Assignee
EMI Ltd
Electrical and Musical 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 to NLAANVRAGE8001486,A priority Critical patent/NL189218B/en
Application filed by EMI Ltd, Electrical and Musical Industries Ltd filed Critical EMI Ltd
Priority to GB1982753A priority patent/GB748460A/en
Priority to DEE9277A priority patent/DE1010665B/en
Priority to FR1109814D priority patent/FR1109814A/en
Publication of GB748460A publication Critical patent/GB748460A/en
Expired legal-status Critical Current

Links

Classifications

    • 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
    • H03K4/26—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 current is produced through an inductor
    • H03K4/28—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 current is produced through an inductor using a tube operating as a switching device

Landscapes

  • Details Of Television Scanning (AREA)
  • Video Image Reproduction Devices For Color Tv Systems (AREA)

Abstract

748,460. Sawtooth generating circuits. ELECTRIC & MUSICAL INDUSTRIES, Ltd. July 8, 1954 [July 17, 1953], No. 19827/53. Class 40 (6). In a sawtooth current generator of the " resonant return " type the H.T. supply for the driver valve is fed to an intermediate point on the primary winding of the output transformer and the damping valve is connected across a greater number of the primary turns than the driver valve. The driver valve 1 is fed with a sawtooth input wave and supplies the deflection coils 4 through a transformer 2, 3, the H.T. being supplied through the lower part only of the primary winding. The damping valve 5 is coupled across the whole of or at least a larger part of the winding. Negative feedback is applied to the damping valve through capacitor 14 and amplifier valve 13 and the time constant of capacitor 14 and resistor 17 may be such as to impose a falling sawtooth wave on the feedback voltage. Negative feedback is also provided by virtue of the fact that the lower part of the primary of the output transformer is in the grid cathode circuit of the damping valve. The amplitude of the output wave is adjusted by a potentiometer 20 which simultaneously adjusts the bias of both driver and damping valves. Potentiometer 18 is adjusted to ensure that the damping valve is always conducting. The input wave may alternatively be of pulse form, in which case the grid of the driver valve is coupled to the first anode of valve 13. In an alternative embodiment (Fig. 2, not shown) the feedback capacitor 14 is connected directly to the grid of the damper valve and cathode bias is provided for the damper valve so that adjust. ing the bias of the driver valve to adjust the output wave amplitude also adjusts the damper valve bias.
GB1982753A 1953-07-17 1953-07-17 Improvements in or relating to circuit arrangements for generating sawtooth currents Expired GB748460A (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
NLAANVRAGE8001486,A NL189218B (en) 1953-07-17 PHOTOGRAPHIC FILM UNIT FOR DIFFUSION TRANSFER.
GB1982753A GB748460A (en) 1953-07-17 1953-07-17 Improvements in or relating to circuit arrangements for generating sawtooth currents
DEE9277A DE1010665B (en) 1953-07-17 1954-07-15 Circuit for generating saw tooth-shaped currents
FR1109814D FR1109814A (en) 1953-07-17 1954-07-16 Improvements to sawtooth current generating circuits

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1982753A GB748460A (en) 1953-07-17 1953-07-17 Improvements in or relating to circuit arrangements for generating sawtooth currents

Publications (1)

Publication Number Publication Date
GB748460A true GB748460A (en) 1956-05-02

Family

ID=10135898

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1982753A Expired GB748460A (en) 1953-07-17 1953-07-17 Improvements in or relating to circuit arrangements for generating sawtooth currents

Country Status (4)

Country Link
DE (1) DE1010665B (en)
FR (1) FR1109814A (en)
GB (1) GB748460A (en)
NL (1) NL189218B (en)

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
USRE21400E (en) * 1932-04-04 1940-03-19 blumlein
DE889309C (en) * 1935-02-06 1953-09-10 Telefunken Gmbh Circuit arrangement for generating a sawtooth-shaped current curve for the magnetic deflection of cathode rays, in particular for television purposes
GB482370A (en) * 1936-08-27 1938-03-28 Eric Lawrence Casling White Improvements in or relating to oscillatory electric circuits
GB518378A (en) * 1938-08-23 1940-02-26 Eric Lawrence Casling White Improvements in or relating to thermionic valve circuits
DE747344C (en) * 1939-05-27 1944-09-27 Telefunken Gmbh Circuit arrangement for generating saw-tooth-shaped current curves in a choke coil
FR901784A (en) * 1943-02-09 1945-08-06 Fernseh Gmbh Transformer relaxation assembly
NL86383C (en) * 1948-11-24
NL163107B (en) * 1950-08-04 Hayashibara Ken PROCESS FOR PREPARING SWEETENED FOODS OR BEVERAGES.
DE895175C (en) * 1951-11-10 1953-11-02 Telefunken Gmbh Circuit arrangement for generating saegezahnfoermiger currents

Also Published As

Publication number Publication date
NL189218B (en)
DE1010665B (en) 1957-06-19
FR1109814A (en) 1956-02-02

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