GB1226023A - - Google Patents

Info

Publication number
GB1226023A
GB1226023A GB1226023DA GB1226023A GB 1226023 A GB1226023 A GB 1226023A GB 1226023D A GB1226023D A GB 1226023DA GB 1226023 A GB1226023 A GB 1226023A
Authority
GB
United Kingdom
Prior art keywords
pentode
control circuit
circuit
transformer
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
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 filed Critical
Publication of GB1226023A publication Critical patent/GB1226023A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N3/00—Scanning details of television systems; Combination thereof with generation of supply voltages
    • H04N3/10—Scanning details of television systems; Combination thereof with generation of supply voltages by means not exclusively optical-mechanical
    • H04N3/16—Scanning details of television systems; Combination thereof with generation of supply voltages by means not exclusively optical-mechanical by deflecting electron beam in cathode-ray tube, e.g. scanning corrections
    • H04N3/18—Generation of supply voltages, in combination with electron beam deflecting
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N3/00—Scanning details of television systems; Combination thereof with generation of supply voltages
    • H04N3/10—Scanning details of television systems; Combination thereof with generation of supply voltages by means not exclusively optical-mechanical
    • H04N3/16—Scanning details of television systems; Combination thereof with generation of supply voltages by means not exclusively optical-mechanical by deflecting electron beam in cathode-ray tube, e.g. scanning corrections
    • H04N3/18—Generation of supply voltages, in combination with electron beam deflecting
    • H04N3/185—Maintaining dc voltage constant

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Dc-Dc Converters (AREA)
  • Details Of Television Scanning (AREA)

Abstract

1,226,023. Sawtooth circuits. PHILIPS ELECTRONIC & ASSOCIATED INDUSTRIES Ltd. 28 Oct., 1968 [31 Oct., 1967], No. 50938/68. Headings H3P and H3T. [Also in Division H2] A circuit for generating a sawtooth current in a coil 6 and an E.H.T. voltage Vh comprises a transformer 1 the primary of which is repetitively switched across a direct current supply V1 via a switching device 5 and an efficiency diode 7 and including a first control circuit 13 for stabilizing the sawtooth current in dependence on the load on supply Vh and a second control circuit including a transformer 14 the primary of which is in series with the efficiency diode 7 whilst the secondary is connected to the control circuit of the switching device 5 so as to change the slope of the turning- on half cycle of the switching waveform 27 in dependence on load on the supply Vh. The first control circuit 13 may comprise a capacitor and voltage-dependent resistor. As shown, the secondary 16 of transformer 14 is connected in the anode circuit of the line oscillator 22 of a TV receiver, the combined waveform being differentiated at 23 and fed to the grid of pentode 5. In Fig. 1 (not shown) the secondary winding 16 is connected in series with the grid of pentode 5. Fig. 5 (not shown) relates to the characteristics of pentode 5 and shows the effect of different load lines (the load lines having negative resistance because of the effect of diode 7) and the effect of changing the slope of the turning-on half cycle of the waveform at the grid. The circuit also avoids Barkhausen oscillations by operating above the knee of the characteristic. Pentode 5 may be replaced by a transistor.
GB1226023D 1967-10-31 1968-10-28 Expired GB1226023A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL6714751A NL6714751A (en) 1967-10-31 1967-10-31

Publications (1)

Publication Number Publication Date
GB1226023A true GB1226023A (en) 1971-03-24

Family

ID=19801591

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1226023D Expired GB1226023A (en) 1967-10-31 1968-10-28

Country Status (8)

Country Link
AT (1) AT281939B (en)
BE (1) BE723100A (en)
DE (1) DE1803141A1 (en)
ES (1) ES359688A1 (en)
FR (1) FR1590435A (en)
GB (1) GB1226023A (en)
NL (1) NL6714751A (en)
SE (1) SE333617B (en)

Also Published As

Publication number Publication date
BE723100A (en) 1969-04-29
AT281939B (en) 1970-06-10
NL6714751A (en) 1969-05-02
DE1803141A1 (en) 1969-05-29
FR1590435A (en) 1970-04-13
ES359688A1 (en) 1970-06-16
SE333617B (en) 1971-03-22

Similar Documents

Publication Publication Date Title
US3582758A (en) Rectifier using low saturation voltage transistors
US2854615A (en) Circuit arrangement for providing a d. c. output
GB1288827A (en)
US4334184A (en) Electronic sensor on/off switch
GB1119993A (en) Improvements in radar camouflage nets
GB903177A (en) Free running pulse oscillator circuits
GB1040759A (en) Improvements in or relating to electric low-pass filter circuits for smoothing direct current
GB790976A (en) Improvements in or relating to aperiodically back-coupled transistor circuits
ES367453A1 (en) Voltage regulator
GB840251A (en) Improvements in or relating to circuit arrangements employing transistors
GB1226023A (en)
HK92196A (en) Electronic switch supply unit
GB1050427A (en)
GB993846A (en) Electronic trigger-pulse-generating circuit arrangement
GB1028107A (en) Improvements in and relating to controlled rectifier circuits
GB1059409A (en) An electrical inverter circuit utilising semiconductor devices
GB1010468A (en) A d.c./d.c. converter
US3204145A (en) Circuit arrangement for operating a periodically activatable switching transistor
ES479642A1 (en) Self-regulating deflection circuit with resistive diode biasing
GB908829A (en) Transistor blocking oscillator arrangements
DE3471213D1 (en) Electronic switching power supply
US3297959A (en) Polarity reversing, output voltage controlled, asymmetric converter
US3071697A (en) Pulse generator utilizing transistor with saturable core feedback and adjustable bias to vary load current
GB781593A (en) Improvements in or relating to transistor circuit arrangements for providing a stabilized d.c. output
US3068394A (en) Control circuit

Legal Events

Date Code Title Description
PS Patent sealed
PLNP Patent lapsed through nonpayment of renewal fees