GB563569A - Improvements in saw-tooth wave form electric oscillation generators - Google Patents

Improvements in saw-tooth wave form electric oscillation generators

Info

Publication number
GB563569A
GB563569A GB1364/43A GB136443A GB563569A GB 563569 A GB563569 A GB 563569A GB 1364/43 A GB1364/43 A GB 1364/43A GB 136443 A GB136443 A GB 136443A GB 563569 A GB563569 A GB 563569A
Authority
GB
United Kingdom
Prior art keywords
grid
control
resistance
saw
impressed
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
GB1364/43A
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.)
British Thomson Houston Co Ltd
Original Assignee
British Thomson Houston 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 British Thomson Houston Co Ltd filed Critical British Thomson Houston Co Ltd
Publication of GB563569A publication Critical patent/GB563569A/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
    • H03K4/32—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 combined with means for generating the driving pulses
    • H03K4/34—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 combined with means for generating the driving pulses using a single tube with positive feedback through a transformer

Landscapes

  • Details Of Television Scanning (AREA)

Abstract

563,569. Valve generating circuits. BRITISH THOMSON-HOUSTON CO., Ltd. Jan. 27, 1943, No. 1364. Convention date, Jan. 27, 1942. [Classes 40 (iii) and 40 (v)] In a saw-tooth current generator an electron discharge device is used having two control electrodes, on one of which a regenerative voltage is impressed in response to output current variations while on the other a degenerative voltage is impressed dependent on anode voltage variations to linearise the wave-form. Fig. 1 shows a beam power tetrode operating as a blocking oscillator with a degenerative feedback produced by the non-inductive impedance network 25, 27 connected between the screen grid and the cathode and having a time-constant shorter than the fundamental period of the oscillations. Adjustment of resistance 25 provides the linearity control, while resistance 22 provides the speed control, capacity 27 may be comprised wholly by inherent self-capacities. Distortion of waveform due to parasitic oscillation is suppressed by the resistance-condenser combination 28, 29. Alternatively, the condenser 29 may be replaced by an inductance or the damping circuit may be connected across the deflecting coils. Synchronizing impulses are applied to the control grid 12 through the input coupling network 31, 32. If the complete television signal 35 is applied to the grid 12, the positive bias of this grid is so adjusted that only the most negative portions of the wave are effective to trigger the oscillator. In a modification, Fig. 2, a pentode is used and an adjustable tapping 45 is provided to adjust the grid bias for synchronizing and to provide an auxiliary linearity control. Specification 523,476 is referred to.
GB1364/43A 1942-01-27 1943-01-27 Improvements in saw-tooth wave form electric oscillation generators Expired GB563569A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US428395A US2360697A (en) 1942-01-27 1942-01-27 Saw-tooth wave generation

Publications (1)

Publication Number Publication Date
GB563569A true GB563569A (en) 1944-08-21

Family

ID=23698720

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1364/43A Expired GB563569A (en) 1942-01-27 1943-01-27 Improvements in saw-tooth wave form electric oscillation generators

Country Status (3)

Country Link
US (1) US2360697A (en)
FR (1) FR938640A (en)
GB (1) GB563569A (en)

Families Citing this family (20)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2440895A (en) * 1943-01-11 1948-05-04 Farnsworth Res Corp Wave generator
US2483431A (en) * 1944-05-10 1949-10-04 Sperry Corp Blocking oscillator
US2478606A (en) * 1945-03-14 1949-08-09 Rca Corp Electromagnetic deflection generator
US2493044A (en) * 1946-06-22 1950-01-03 Farnsworth Res Corp Deflection wave generator
US2540692A (en) * 1946-10-16 1951-02-06 Rca Corp Wave generating system
GB629898A (en) * 1946-12-04 1949-09-30 Eric William Bull Improvements relating to negative feedback amplifiers
BE484981A (en) * 1947-09-27
GB645426A (en) * 1948-01-09 1950-11-01 Marconi Wireless Telegraph Co Improvements in or relating to saw tooth current wave generators
US2633554A (en) * 1948-01-24 1953-03-31 Rca Corp Beam deflection control
US2647426A (en) * 1948-03-31 1953-08-04 William F Battle Electrically operated musical instrument
US2524712A (en) * 1949-01-21 1950-10-03 Tele Tone Radio Corp Horizontal sweep circuit
US2536839A (en) * 1949-05-24 1951-01-02 Rca Corp Power recovery cathode-ray beam deflection system
NL153733C (en) * 1949-05-24
US2536838A (en) * 1949-05-24 1951-01-02 Rca Corp High-efficiency cathode-ray beam deflection system
US2611106A (en) * 1949-07-20 1952-09-16 Motorola Inc Television sweep system
BE497251A (en) * 1949-07-29
US2623178A (en) * 1950-04-04 1952-12-23 Hartford Nat Bank & Trust Co Blocking oscillator
NL88011C (en) * 1950-04-04
US2753451A (en) * 1952-01-31 1956-07-03 Sperry Rand Corp Sweep voltage control apparatus
US3005928A (en) * 1959-02-26 1961-10-24 Walter L Wuster Sawtooth gating sweep circuit providing adjustable d.c. reference level

Also Published As

Publication number Publication date
US2360697A (en) 1944-10-17
FR938640A (en) 1948-10-20

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