GB479113A - Improvements in or relating to thermionic valve circuits particularly for use in television - Google Patents

Improvements in or relating to thermionic valve circuits particularly for use in television

Info

Publication number
GB479113A
GB479113A GB12118/36A GB1211836A GB479113A GB 479113 A GB479113 A GB 479113A GB 12118/36 A GB12118/36 A GB 12118/36A GB 1211836 A GB1211836 A GB 1211836A GB 479113 A GB479113 A GB 479113A
Authority
GB
United Kingdom
Prior art keywords
condenser
resistance
valve
scanning
grid
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
GB12118/36A
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Priority to GB12118/36A priority Critical patent/GB479113A/en
Priority to US138951A priority patent/US2241762A/en
Priority to FR821198D priority patent/FR821198A/en
Priority to DEE2323D priority patent/DE973547C/en
Publication of GB479113A publication Critical patent/GB479113A/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
    • H03K4/39—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

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

Abstract

479,113. Valve generating circuits. BLUMLEIN, A. D. April 29, 1936, No. 12118. [Class 40 (v)] An amplifier for supplying saw-tooth current to the scanning-coils of a cathode-ray tube is provided with a negative reaction connection which feeds back to the input circuit saw-tooth potentials proportional to the current in the scanning-coils. As shown in Fig. 1, a condenser 1 is slowly charged through a resistance 2 and is discharged through a valve 3. The upper plate of the condenser 1 is connected through a coupling-condenser 5 to the grid of the amplifier 7 the plate of which is connected through a coupling-condenser 9 to the primary coil 10 of the output transformer, the scanning-coil 11 being in the secondary circuit. A leak resistance 6 is provided in the grid circuit and the grid is biassed by a condenser-shunted resistance 18 in the cathode lead. The negative feed-back is provided by connecting the lower plate of the condenser 1 to the junction of a resistance 13 and inductance 12 connected across the transformer coil 10, this connection serving to maintain a true saw-tooth output, despite distortion in the valve 7 and distortion due to the inductive load on that valve. The ratio of inductance 12 to resistance 13 is the same as in the scanning circuit. A supplementary condenser 11 may be connected directly between the grid and earth to supply a sawtooth potential to the grid independently of feed back. In Fig. 3, the shunt inductance 12 and resistance 13, are replaced respectively by a resistance 14 and capacity 15. A further series condenser 17 and shunt resistance 16 may be provided as shown. The Specification indicates the correct proportion of the reactance and resistance elements in relation to the inductance and resistance of the transformer and the scanning-coils. In Fig. 4, feed-back is taken from a circuit including a third winding 20 on the transformer 10. The circuit may comprise a connection to the cathode of the valve 7, a condenser 22 and a resistance 24, the latter being bridged by a resistance-reactance shunt 23, 21 with the junction connected to the lower plate of the condenser 1. The condenser 1 may be on the grid side of the coupling-condenser 5 and leak 6. Self-oscillation may be prevented by connecting a condenser 25 and resistance 26 between the high-potential end of the third winding 20 and the anode of the valve 7. The discharge valve 3 may he of the blocking- oscillator type. Specification 401,990 is referred to. According to the Provisional Specification the valve 7 may supply scanning-voltage to deflecting -plates.
GB12118/36A 1936-04-29 1936-04-29 Improvements in or relating to thermionic valve circuits particularly for use in television Expired GB479113A (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
GB12118/36A GB479113A (en) 1936-04-29 1936-04-29 Improvements in or relating to thermionic valve circuits particularly for use in television
US138951A US2241762A (en) 1936-04-29 1937-04-26 Thermionic valve circuit, particularly for use in television
FR821198D FR821198A (en) 1936-04-29 1937-04-28 Improvements to thermionic lamp circuits intended particularly for television
DEE2323D DE973547C (en) 1936-04-29 1937-04-30 Circuit arrangement for generating saegezahnfoermiger currents

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB12118/36A GB479113A (en) 1936-04-29 1936-04-29 Improvements in or relating to thermionic valve circuits particularly for use in television

Publications (1)

Publication Number Publication Date
GB479113A true GB479113A (en) 1938-01-31

Family

ID=9998693

Family Applications (1)

Application Number Title Priority Date Filing Date
GB12118/36A Expired GB479113A (en) 1936-04-29 1936-04-29 Improvements in or relating to thermionic valve circuits particularly for use in television

Country Status (4)

Country Link
US (1) US2241762A (en)
DE (1) DE973547C (en)
FR (1) FR821198A (en)
GB (1) GB479113A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE969358C (en) * 1938-12-16 1958-05-22 Emi Ltd Vibration generator for generating essentially saw-tooth shaped electrical vibrations
DE973117C (en) * 1954-03-27 1959-12-03 Philips Nv Circuit arrangement for generating a saw-tooth-shaped current in a coil for vertical deflection of an electron beam

Families Citing this family (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2899601A (en) * 1959-08-11 Non-linear
DE954792C (en) * 1938-06-14 1956-12-20 Telefunken Gmbh Circuit arrangement for producing a saw-tooth-shaped current curve in a coil
DE897298C (en) * 1941-03-01 1953-11-19 Telefunken Gmbh Saw tooth power generator with a tube
BE445079A (en) * 1941-04-03
US2440786A (en) * 1943-06-30 1948-05-04 Rca Corp Cathode-ray beam deflecting circuits
DE951387C (en) * 1944-02-11 1956-10-31 Lorenz C Ag Circuit for generating saw-tooth-shaped deflection currents
US2455618A (en) * 1945-01-10 1948-12-07 Remco Electronic Inc Damping follow-up mechanism by degenerative derivative
GB629898A (en) * 1946-12-04 1949-09-30 Eric William Bull Improvements relating to negative feedback amplifiers
GB633366A (en) * 1947-02-28 1949-12-12 Edward Arthur Newman Improvements in or relating to electrical circuit arrangements for the generation ofoscillations
DE905656C (en) * 1949-06-10 1954-03-04 Lorenz C Ag Circuit arrangement for generating linear saw tooth-shaped currents in cathode ray deflection coils
NL90070C (en) * 1949-11-04
US2729744A (en) * 1950-11-02 1956-01-03 Rca Corp Deflection waveform generator
US2907919A (en) * 1954-10-01 1959-10-06 Rca Corp Relaxation oscillating circuit arrangement

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB317005A (en) * 1928-08-08 1930-10-22 Standard Telephones Cables Ltd Electric signal wave amplifying and translation systems
DE584782C (en) * 1931-01-06 1933-09-23 Telefunken Gmbh Amplifier circuit
NL39554C (en) * 1931-09-26
GB427901A (en) * 1933-11-03 1935-05-02 Emi Ltd Improvements in and relating to television and the like transmission systems
GB451117A (en) * 1935-01-29 1936-07-29 Cossor Ltd A C Improvements in or relating to electrical time base arrangements for use in oscillographic observations and the like
NL45214C (en) * 1935-04-18

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE969358C (en) * 1938-12-16 1958-05-22 Emi Ltd Vibration generator for generating essentially saw-tooth shaped electrical vibrations
DE973117C (en) * 1954-03-27 1959-12-03 Philips Nv Circuit arrangement for generating a saw-tooth-shaped current in a coil for vertical deflection of an electron beam

Also Published As

Publication number Publication date
FR821198A (en) 1937-11-29
DE973547C (en) 1960-03-24
US2241762A (en) 1941-05-13

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