GB401634A - Improvements relating to electrical circuits for producing oscillations of non-sinusoidal wave form for use, for example, with cathode ray devices - Google Patents

Improvements relating to electrical circuits for producing oscillations of non-sinusoidal wave form for use, for example, with cathode ray devices

Info

Publication number
GB401634A
GB401634A GB26019/33A GB2601933A GB401634A GB 401634 A GB401634 A GB 401634A GB 26019/33 A GB26019/33 A GB 26019/33A GB 2601933 A GB2601933 A GB 2601933A GB 401634 A GB401634 A GB 401634A
Authority
GB
United Kingdom
Prior art keywords
valve
impulses
coils
scanning
condensers
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
GB26019/33A
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.)
MICHAEL BOWMAN MANIFOLD
EMI Ltd
Electrical and Musical Industries Ltd
Original Assignee
MICHAEL BOWMAN MANIFOLD
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
Application filed by MICHAEL BOWMAN MANIFOLD, EMI Ltd, Electrical and Musical Industries Ltd filed Critical MICHAEL BOWMAN MANIFOLD
Priority to GB26019/33A priority Critical patent/GB401634A/en
Priority to GB15011/32A priority patent/GB402134A/en
Priority to US670858A priority patent/US2097334A/en
Priority to FR756123D priority patent/FR756123A/en
Publication of GB401634A publication Critical patent/GB401634A/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
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03K—PULSE TECHNIQUE
    • H03K12/00—Producing pulses by distorting or combining sinusoidal waveforms
    • 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
    • H03K4/39—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 an amplifier
    • H03K4/43—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 an amplifier combined with means for generating the driving pulses

Landscapes

  • Inductance-Capacitance Distribution Constants And Capacitance-Resistance Oscillators (AREA)
  • Geophysics And Detection Of Objects (AREA)
  • X-Ray Techniques (AREA)

Abstract

401,634. Television. ELECTRIC & MUSICAL INDUSTRIES, Ltd., Hayes, Middlesex, and MANIFOLD, M. BOWMAN-, Heathcot, Worplesdon Station, Surrey. May 26, 1932, No. 26019/33. Divided on 402,134. [Classes 40 (iii) and 40 (v).] Relates to the production of currents of saw-toothed wave-form for scanning in television receivers of the cathoderay-oscillograph type. The currents are controlled and synchronized by means of impulses generated as described in Specification 402,134. These impulses have been transmitted as subcarrier impulses, and after demodulation of the carrier the sub-carrier is applied to terminals 13, 14. The sub-carrier is demodulated by valve V5, and the impulses which control the line scanning-coils 22 are separated by condensers 15, 20 from those which control the frame scanning-coils 18. So long as valve V6 is blocked, condenser 16 charges up slowly through resistance 17, but when a frame scanning-impulse arrives condenser 16 discharges rapidly through the valve. Thus a saw-toothed grid-voltage is applied to valve V7, and the frame scanning-coils 18 carry a saw-toothed current in view of their impedance being low in comparison with that of the valve. In the case of the line scanning- impulses, however, the inductance of the coils 22 cannot be neglected, and a wave-shaping system 26, 27, 28 is employed. The line scanning-impulses pass through valves V1, V2, V3, as described in Specification 402,134. Oscillations are set up in the tuned circuit 3, 4, 21 ; valves V2, V3 are biased so that only the peak of the wave is passed ; and the time constant of the coupling between them is made small, so that sharp short impulses are applied to valve V3. So long as valve V3 is blocked, condensers 26, 27 (of which 27 is larger than 26) charge slowly through the resistances shown, but when an impulse arrives the condensers suddenly discharge through the valve. The output voltage of the last valve is as shown at c, Fig. 2. The back e.m.f. due to the inductance of the coils 22 is of the form b, so that the current in the coils is of the required shape a.
GB26019/33A 1932-05-26 1932-05-26 Improvements relating to electrical circuits for producing oscillations of non-sinusoidal wave form for use, for example, with cathode ray devices Expired GB401634A (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
GB26019/33A GB401634A (en) 1932-05-26 1932-05-26 Improvements relating to electrical circuits for producing oscillations of non-sinusoidal wave form for use, for example, with cathode ray devices
GB15011/32A GB402134A (en) 1932-05-26 1932-05-26 Improvements relating to electrical circuits for producing oscillations of non-sinusoidal wave form for use, for example, with cathode ray devices
US670858A US2097334A (en) 1932-05-26 1933-05-13 Control circuits for cathode ray devices
FR756123D FR756123A (en) 1932-05-26 1933-05-26 Improvements in electrical circuits to produce oscillations of non-sinusoidal shape applicable for example to cathode ray devices

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB26019/33A GB401634A (en) 1932-05-26 1932-05-26 Improvements relating to electrical circuits for producing oscillations of non-sinusoidal wave form for use, for example, with cathode ray devices

Publications (1)

Publication Number Publication Date
GB401634A true GB401634A (en) 1933-11-16

Family

ID=10237076

Family Applications (2)

Application Number Title Priority Date Filing Date
GB26019/33A Expired GB401634A (en) 1932-05-26 1932-05-26 Improvements relating to electrical circuits for producing oscillations of non-sinusoidal wave form for use, for example, with cathode ray devices
GB15011/32A Expired GB402134A (en) 1932-05-26 1932-05-26 Improvements relating to electrical circuits for producing oscillations of non-sinusoidal wave form for use, for example, with cathode ray devices

Family Applications After (1)

Application Number Title Priority Date Filing Date
GB15011/32A Expired GB402134A (en) 1932-05-26 1932-05-26 Improvements relating to electrical circuits for producing oscillations of non-sinusoidal wave form for use, for example, with cathode ray devices

Country Status (3)

Country Link
US (1) US2097334A (en)
FR (1) FR756123A (en)
GB (2) GB401634A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE878962C (en) * 1938-03-05 1953-06-08 Telefunken Gmbh Circuit arrangement for generating periodic, non-sinusoidal currents

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE743485C (en) * 1934-06-08 1943-12-27 Opta Radio Ag Arrangement for generating synchronizing pulses and for inserting them into the picture signal sequence in television broadcasts
DE763069C (en) * 1935-02-28 1953-02-09 Rca Corp Circuit arrangement for phase shifting pulses
DE761501C (en) * 1938-08-19 1953-05-18 Fernseh Gmbh Method for deriving a sequence of pulses from a given periodic pulse series with a phase position that can be changed at will
US2537065A (en) * 1944-04-18 1951-01-09 Sperry Corp Gate generator
US2489852A (en) * 1944-12-04 1949-11-29 Gen Electric Electronic trigger pulse generator
US2546981A (en) * 1945-06-15 1951-04-03 Collins Radio Co Pulsing circuit
BE490931A (en) * 1948-09-02

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE878962C (en) * 1938-03-05 1953-06-08 Telefunken Gmbh Circuit arrangement for generating periodic, non-sinusoidal currents

Also Published As

Publication number Publication date
GB402134A (en) 1933-11-27
US2097334A (en) 1937-10-26
FR756123A (en) 1933-12-05

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