US2555831A - Television deflection power recovery circuit - Google Patents

Television deflection power recovery circuit Download PDF

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Publication number
US2555831A
US2555831A US90612A US9061249A US2555831A US 2555831 A US2555831 A US 2555831A US 90612 A US90612 A US 90612A US 9061249 A US9061249 A US 9061249A US 2555831 A US2555831 A US 2555831A
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Prior art keywords
deflection
circuit
yoke
inductance
anode
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Expired - Lifetime
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US90612A
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English (en)
Inventor
Simeon I Tourshou
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RCA Corp
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RCA Corp
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Priority to BE495378D priority Critical patent/BE495378A/xx
Priority to NL153232D priority patent/NL153232C/xx
Application filed by RCA Corp filed Critical RCA Corp
Priority to US90612A priority patent/US2555831A/en
Priority to FR1017905D priority patent/FR1017905A/fr
Priority to DER1572A priority patent/DE976252C/de
Priority to CH291063D priority patent/CH291063A/fr
Priority to ES0192729A priority patent/ES192729A1/es
Priority to GB10526/50A priority patent/GB672075A/en
Application granted granted Critical
Publication of US2555831A publication Critical patent/US2555831A/en
Anticipated expiration legal-status Critical
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    • 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
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N5/00—Details of television systems
    • H04N5/66—Transforming electric information into light information
    • H04N5/68—Circuit details for cathode-ray display tubes

Definitions

  • a'portion of the damped reactive energy in-the deflection system is fed back for utilization by the deflection circuit to thereby improve the overa all operating efficiency of the system.
  • Another problem in connection with such.aj-di-- rect drive system is that of obtaining suflicient linearity of sweep during that portion of the'defiection cycle supplied by the reaction scanning action.
  • the resulting boostand voltage has. in it an alternating, current.-pul'se: component which iszgenerally undesirable.- Ordi-. nary filter arrangements for eliminating. this-.un desirable.pulsecomponent due to kickback in-the deflection system either unduly. load the, defiece. tion yoke itself or result intan extremel high terminal impedance for the.- boosted voltage.
  • The: present invention aims. to provide a high; efficiency. low costreaction scanning 'system jo f. the direct drive B. boost type which overcomes.
  • a still further object of the present invention rests in the provision of a novel and simple B boost circuit for direct coupled electromagnetic cathode ray beam deflection yokes in which energy from an associated reaction scanning damping circuit is recovered for B boost action and in which such B boost recovery action is compensated in the reaction scanning cycle to provide substantially linear deflection operation.
  • Still another object of the present invention resides in the provision of a novel form of power recovery system particularly applicable to directly driven'electromagnetic deflection coils in television systems wherein the deflection coils are included in the series with the anode-cathode circuit of the deflection system driving vacuum tube.
  • Figure 1 schematically illustrates one form of the present invention as applied to a television type cathode ray beam deflection system.
  • Figure 2 is a schematic representation of another form of the present invention as applied to a typical television receiver.
  • FIG. 3 graphically illustrates certain waveforms peculiar to the operation of the present invcntion.
  • FIG. 1 illustrates a conventional form of television deflection circuit
  • Ill a source of sawtooth deflection signal having a waveform substantially as illustrated at M.
  • a synchronizing signal may be applied to the terminal l6 for synchronizing the developed sawtooth signal M.
  • the developed sawtooth signal is then applied to the control grid [8 of a cathode follower type amplifier stage employing discharge tube 20.
  • the anode 22 of the discharge tube 20 receives a suitable positive bias through dropping resistor 24 connected with a. source of positive potential 26 by-pass condenser 28 maintaining the anode 22 at substantially A. C. ground potential.
  • a cathode follower load resistor 34 Connected between the cathode 30 of the cathode follower amplifier and a source of negative biasing potential 32 is a cathode follower load resistor 34 whose upper end is directly coupled to the control grid 36 of the deflection output discharge tube 38.
  • the resulting loW impedance of the cathode follower circuit permits higher amplitude drive of the control grid 36 without encountering undesirable .4 distortion due to grid current flow.
  • a suitable cathode biasing resistor 4B is connected between the cathode 42 of discharge tube 38 and ground potential, by-pass capacitor 54 being provided to reduce degeneration in the cathode circuit.
  • a screen grid 48 is connected with a source of positive potential 48 through a screen dropping resistor 50, which is in turn by-passed to the oathode by means of capacitor 52.
  • the upper terminal 58 of the yoke 54 is connected with the driver tube anode 69 through B boost capacitor 62, which in turn is connected, :with the primary 54 of the pulse step-up autotransformer 63.
  • the lower terminal 68 of the deflection winding is then connected with a source of positive potential Hi from which is supplied energy to the deflection circuit.
  • a damping diode 12 is provided for damping the deflection yoke 54 and is connected in shunt therewith through capacitor 14 as Well as through variable linearity control inductance I6 and capacitor 62.
  • the novel form of high voltage power supply for the accelerating anode 18 of the kinescope 56 is based upon the high voltage pulse step-up transformer 66 and is disclosed in more detail in a co-pending application by Simeon I. Tourshou et al., supra.
  • the deflection current for the yoke winding 54 must pass through the primary 6 3 of the autotransformer 66 and therefore induces in the secondary all high voltage positive going pulses corresponding in time to the retrace portion of the deflection cycle.
  • These high voltage pulses are then rectified by the diode '82 to develop a high unidirectional potential across the storage capacitor 84.
  • the voltage appearing thereacross is then applied through the filter resistor 86 to the accelerating terminal 18 of the cathode ray tube 56.
  • the auxiliary winding 83 of the autotransformer 66 supplies heater power for the filament 90 of the high voltage rectifier 82.
  • the deflection circuit can be seen to operate as a reaction type of scanning circuit, that is, the desired sawtooth of current through the deflection yoke 54 is comprised of two sections, namely, a first portion produced by anode current (i of the driver tube 38 (shown in curve 311) and a second portion provided by current (is) representing magnetic energy stored in the deflection yoke and clamped by the damper tube 12.
  • a first portion produced by anode current (i of the driver tube 38 shown in curve 311)
  • current (is) representing magnetic energy stored in the deflection yoke and clamped by the damper tube 12.
  • the driver tube 38 is biased sufiiciently beyond cut-off such that only the upper portion of the sawtooth l4 causes conduction in the anode circuit.
  • this conduction period T4 reprepresents a little more than half of the linear rise time T1 of the current sawtooth having a period of T.
  • T1 which represents the positive peak of the driving sawtooth
  • the discharge tube 38 is rendered non-conductive by the downward vertical portion of the sawtooth.
  • the energy represented by the current in the yoke 53 at that time causes the yoke circuit and its associated stray capacitance to begin free oscillation.
  • the upper end 58 of the deflection yoke 54 then starts to go negative with respect to the lower end of the deagslszgser 5.
  • the positive potential developed across the capacitors E2 and it will represent a portion of magnetic energy stored in the yoke 54 at the end of the linear rise time T4.
  • the conduction of the damper diode l2 prevents the terminal 58 of the deflection yoke from going appreciably more negative with respect to ground than the positive B potential at terminal 10.
  • the average B boost thereby represented by the stored energy on capacitors 62 and 1 3 may be illustrated by dashed line M in Figure 3d.
  • Dashed line 94 is merely the A. C. axis of the yoke voltage Ey which, as stated, cannot go appreciably more negative than +3.
  • the average potential boost in the circuit will be represented by the voltage Eb defined by dashed line 94 in Figure 3d.
  • the phase and magnitude of the ripple-voltage appearingacross the capacitors 62 and 74 can be changed relative to'one another thereby permitting quite a versatile control over the scanning linearity produced by thecircuit.
  • FIG. 1 a typical television receiver arrangement is illustrated comprising a receiver section [00, which may include the well-known television receiving components such as an R. F. amplifier, an oscillator, a converter, an I. F. amplifier, video demodulator, and video amplifier.
  • the output of the video amplifier is indicated for connection to the grid of a kinescope such as 56 which is also shown in Figure l and duplicated in Figure 2 for sake of descriptive simplicity.
  • the television receiving arrangement also includes'a sync separator H14, whose output is applied to synchronize ahorizontal deflection signal generator 186 and vertical deflection circuit I08.
  • the output of the vertical deflection circuit is available at terminals XX indicated for connection to the vertical deflection yoke XX at H0.
  • Thehorizontal deflection signal generator I06 may be compared to the deflection signal generator IQ of Figure 1 taken in combination with the cathode follower amplifier 20, so that the output vacuum tube 38 may be properly driven with a sawtooth of voltage.
  • the circuit arrangement of Figure l, as well as corresponding indexes have been duplicated wherever possible in Figure 2. Examples of typical circuit arrangement applicable to the functions depicted by the various blocks of Figure 2 are given in an article entitled Television receivers by Antony Wright appearing in the March 1947 issue of RCA Review. Normal B+ operating potential for the various blocks is illustrated as being provided at M6, the 3-4- power supply connections themselves being indicated by darker lines.
  • the basic B boost action of Figure 1 is preserved, but is rearranged so that the actual boosted B voltage appears at the lower end of the deflection yoke 54 and therefore does not include the higher potential positive-going fly-back or retract pulse.
  • the primary 64 of the autotransformer 66 is directly connected to the terminal 58 of the deflection winding 54 while the counterparts of capacitance M, inductance l6, and storage capacitor 62 are respectively at I l, 16 and 62 in Figure 2.
  • Nominal 13 power supply potential for the operation of the deflection circuit is applied at terminal H2 of the inductance i6 whereas the B boost voltage appears at terminal H4 of storage capacitor 62.
  • the frequency of this ringing will be made a function of the primary shunt capacitance 55 acting across the inductance 65 as well as the remaining circuit stray capacitance acting through ground. If now the frequency of the transformer primary resonant circuit is properly adjusted relative to the resonant frequency of the series circuit formed by the yoke 54 taken in combination with its overall shunt capacitances 56 and 51, the ringing of the high voltage transformer primary may be allowed to complete sufflcient free oscillation to actually supplement the terminal voltage of the yoke stray capacitance 51. This occurs at a time when the terminal voltage of the yoke 54 would otherwise be measurably lower. Of course, this action will increase the actual energy damped by the damper l5 and correspondingly, the B boost energy applied to the storage capacitors 62 and M.
  • the degree of energy recovery and left-side linearity may be in some cases improved by also supplementing the stray capacitance 51 with a fixed capacitance of a. discrete value.
  • the magnetic energy recovered from the pulse step-up transformer primary inductance may be thought of as partially compensating for the losses in the. deflection yoke 54. Since the inductance of theprimary is the parameter of1importance, it is evident that should itnot be desired to obtain kinescope second anode high voltage from the, deflection circuit, the primary 64 of the high voltage transformer 66 may be replaced by a suitable value of fixed inductance. .In still-other cases where the advantage of recovering, the energy magnetically stored in the transformer primary inductance or its equivalent isinot consideredof toogreat an importance, such an inductance maybe entirely omitted. Experimentally, it has been found that under such conditions omitting the series inductance and with the use-of a deflection yoke of conventional efficiency, the ,peak amplitude of usable deflec- '1.
  • the linearity inductance 76 also acts as a magnetic storage device, which will upon cut-01f of the output tube 38 produce a complex current waveform around the series circuit comprising the inductance lfi'and the two capacitors 6,2 and 14. Since the waveform thereby developed across the inductance tends toproduce a variable alternating current waveform bias on the damper 12 proper phasing'of the voltage, as well as its choice of frequency, will not only afiord means for establishing proper deflection linearity, but also provide means for determining the effectiveness of power recovery. In this regard, it has; been found that most satisfactory operation of the deflection circuit of : Figure. 1, modified by removal of the inductance represented by the high voltage transformer primary, is obtained whenthe ringing frequency of the series circuit associated with the linearity inductance 1.6. is in the order of one half to twice he cyclic deflection rate,
  • this range of value isonly exemplary in magnitude and. depends upon various other circuit conditions, such as yoke inductance and damper capacitance, which may vary considerably. Again, the inclusion of the pulse step-up transformer primary winding 88 may, under certain resonant conditions and deflection rates, require even further alteration of this linearity control circuit resonance frequency.
  • the defiectioncircuits of thepresent invention contemplate the pling ofy wo resonant ircuits, ne defi ed y the-yoke inductance-Maud the other defined'by the transformer primary inductance 64, each of course taken in wonnection withjts associated shunt capacitance.
  • the linearity inductance 16 may be viewed as being partially included in either circuit, depending upon the ratio of the capacitors 62 and i4.
  • first and second inductance galvanically connected in series with one another to form an inductance combination whose respective extremities define a first and second input terminals
  • a switch having an inherent open circuit shunt capacitance, connections placing said switch in series .with said inductance combination and-between the negative power supply terminal and the -flrst'input terminal of said inductance combination, a storage capacitance connected from the second terminal of said inductance combination to the positive power supply terminal, a damping device having an anode and a cathode, a connection from said positive power supply terminal and said clamping device anode, a connection from the junction of said first and second inductances to the damping device cathode, andmeans to open and .close said. switch.
  • an electromagnetic cathode ray deflection system of the direct drive type which employs a deflection yoke having substantially all of its deflection winding connected in the anode-cathode circuit of an output amplifier, the combination of, a storage capacitor connected in series with the deflection winding in its connection in said amplifier anode-cathode circuit, and an electrical damping element connected in shunt with the series combination of said storage capacitor and the entire portion of said deflection winding included in the anode-cathode circuit of the output amplifier.
  • Apparatus according to claim 4 wherein there is provided a low-pass filter connected in shunt with said storage capacitor, said low-pass filter having a direct current conducting portion and wherein said damping device is connected in series with the low-pass direct current conductive portion in the shunt connection of said damping device across the series combination of said storage capacitor and deflection winding.
  • an electromagnetic cathode ray deflection system of the direct drive type which employs an electromagnetic deflection yoke having its output terminals thereon defining the extremities of a single coordinate deflection winding
  • an output amplifier having an anode and cathode, said output amplifier inherently exhibiting a predetermined output capacitance, an inductance, a storage capacitor, a source of anode polarizing potential, connections placing said inductance, said capacitance and the output terminals of said deflection yoke windin in series between the anode of said amplifier and. said source of polarizing potential, and a damping device connected in shunt across the series combination formed by said storage capacitor and said deflection yoke output terminals.
  • a first capacitor connected in series with the deflection winding serially connected in said amplifier anode-cathode circuit, an inductance and second capacitor connected in series with one another, said serially connected inductance and capacitor being placed in shunt with a portion of the amplifier anode-cathode circuit including said first capacitor, an electrical damping element having an anode and a cathode, a connection from said damping element cathode to the amplifier anode extremity of said deflection yoke winding, and a connection from the damping element anode through at least a portion of said inductance to the amplifier cathode extremity of said deflection winding.
  • Apparatus according to claim 8 wherein there is additionally provided a storage inductance connected in series with the output amplifier anode extremity of said deflection yoke winding.
  • said deflection yoke utilization terminals being serially connected in the anodecathode circuit of an output amplifier, the combination of, a first capacitor connected in series with said deflection coil terminals in the output amplifier anode-cathode circuit, an inductance and second capacitor connected in series with one another to form a combination, connections placing said inductance and capacitor combination in shunt with a portion of the amplifier anodecathode circuit which includes said first capacitor, and a unilaterally conductive damping device connected in shunt through at least a portion of said inductance with a portion of said output amplifier anode-cathode circuit.
  • an electromagnetic cathode ray deflection system of the direct drive type which employs a deflection yoke having two utilization terminals for energizing the complete yoke deflection winding, said deflection yoke utilization terminals being serially connected in the anodecathode circuit of an output amplifier, the combination of, a first capacitor connected in series with said deflection coil terminals in the output amplifier anode-cathode circuit, an inductance and second capacitor connected in series with one another to form a combination, connections placing said inductance and capacitor combination in shunt with a portion of the amplifier anode-cathode circuit which includes said first capacitor, a unilaterally conductive damping device having an anode and a cathode, a connection from said damping device anode to the amplifier cathode side of said deflection yoke, and a connection from said damping device cathode to said inductance.
  • Apparatus according to claim ll wherein there is additionally provided a storage inductance connected in series with the anode-cathode circuit of said output amplifier between the output amplifier and the cathode of said unilaterally conductive damping device.
  • Apparatus according to claim 12 wherein the shunt capacitance of said deflection yoke bears a predetermined relationship to the value 'of total output amplifier shunt capacitance, taken in combination with the value of said storage inductance whereby a predetermined percentage of stored energy in said inductance is transferable by said unilaterally conductive damping device to said first capacitor through the shunt capacitance of said output amplifier.
  • an electromagnetic cathode ray deflection system of the direct drive type which employs a deflection yoke having a total single coordinate directly connected in the anode-cathode circuit of an output amplifier, in combination, a first capacitor connected in series with said deflection coil in said amplifier anode-cathode circuit, an inductance and a second capacitor connected in series with one another, said serially connected inductance and capacitor being placed as a series combination in shunt with a portion of the amplifier anode-cathode which includes said first capacitor, an electrical damping element having an anode and a cathode, a connection from the damping element cathode to the amplifier anode extremity of the complete yoke deflection winding, and a connection from the damping element anode through at least a portion of said inductance to the amplifier cathode side of the complete yoke deflection winding.
  • an electromagnetic cathode ray deflection system of the direct drive type which employs a de e t on y e having two utilization terminals for; energizing? the... complete-coordinate? yokee flection; windinggsaid. deflection; yoke:- utilization terminals..being:.serially connected :imthecanodecathode; circuit ofian. output amplifier; the.;c0m-.- bination of: a first. capacitor: connected miseries with saiddeflection:coil.terminals inthe output amplifier anode-cathode circuit, aniinductance and second capacitor connected, inseriesr with one another: to. form" a.
  • an electromagneticcathode ray deflection. system ofthe direct drive type which employsxa deflection yokehaving the terminalsof its complete horizontal deflection winding-icon! nectedin serieswith the anode-cathode circuit of an electronic ou tputalnplifier, a capacitor connected in series. with the deflection yoke winding terminals in the-output amplifier.
  • anode-cathode circuit, alow-passfilter connected in shunt with a portion of the amplifier anode-cathode'circuit which includes said :capacitona; portion of.said low-pass filterv being; conductive. tQdirect current; and;an':electrical damper connected'inshunt with a portion of said output amplifier anode-cathode circuit through at least the direct currentncon ducting-portion of saidlow -pass. filter.
  • cathode ray deflectionsystem of. the direct drive ty'pevwhich-em ploys' a defiection-yoke-having: the terminals-of its: total. coordinate winding connected: in. series with theranode-cathode circuit of an; electronic output amplifier, in combination a a. capacitorconnected inrseries with the deflectiorryokercoilin the output amplifier anode-cathode; circuit; a low-pass filter connected in shunt with-a portion of. the amplifier anode-cathodeccircuit which in cludes said.
  • astorage capacitor connected inseries': with the electron di'schargetube .anodeecathod'elcircuit between the pulse step-up transformer primary winding and said deflection yoke, a low-pass filter circuit connected in shunt with said storag capacitor, said low-pass filter having a portion thereof conductive to direct current, a unilaterally conductive damping device connected in shunt through the direct current conductive portion of said, low-pass filter with" the? series: connection; of: the storage.
  • a power recovery unidirectional-1 potential boosting arrangement comprising in. combina'-'- tion: a storage capacitor serially connecting the primaryxof said pulsestep up. transformer with on'eiwinding. extremityterminationof said deflection-yoke; an inductance and a capacitance corrnected in series 'to' form. a waveshapingnetwork, connections placing: said. wave-shaping network in. shunt: with said. storage capacitor, .az. unilaterallyf conductive damping. device havingan anode; and a. cath0d'e,-.
  • acathode ray beam deflection and accelerating potentialigenerating system of the type employingan electron discharge tube havingdirectly connected inits anode-cathode circuit the series combi-nationof a pulse step-up-transformer primary windinganda cathode ray beam deflection yoke, the yoke having afirst'and second total axial windingxuti-lizationterminalsv and the electrical impedance of' said: primary winding beingsuch-that an undesirably excessive unidirectional voltage drop is' produced across said winding thereby tending to reduce the active anode-cathode biasing potential of th electron discharge tube; a -power recovery unidirectional potential boosting arrangement comprising in combination: a storage capacitor serially connecting the: primary: of said pulse step-up transformer-with the: first: terminal of said deflection yoke, an inductance and a capacitance connected iniseries to form awave-shaping network, connections placing said wave
  • lntanielectrornagnetic cathode ray deflection system of the" direct driveitype which employs'adeflection yoke having-the terminals of'a total coordinate-windi-ng connectediin series witha source of operating potential which, in turn, is serially connected in the anode-cathode circuit of an electronic output amplifier, the combination of, a capacitor connected in serieswith the deflection yoke winding between one extremity of the yoke winding and the source of operating potential, a low-pass filter connected in shunt with said capacitor, a portionof said low-pass filter being conductive to direct current, and an electrical damper connected to form a seriescombination with the direct current conducting portion of said low-pass filter, and connections placing said series combination in shunt with a portion of said anode-cathode circuit which embraces the series connection of said capacitor with substantially all of said deflection yoke winding.
  • an electromagnetic cathode ray deflection system of the direct drive type which employs a deflection yoke having the terminals of a total coordinate winding connected in series with the source of operating potential which, in turn, is serially connected in the anode-cathode circuit of an electronic output amplifier
  • Apparatus according to claim 22 wherein said electrical damper is provided with an anode and a cathode and wherein said electrical damper anode is connected with the amplifier anode side of said deflection yoke winding and said electrical damper anode connected with the amplifier cathode side of said deflection yoke winding through the series combination comprising the direct current conducting portion of said low-pass filter and said capacitor.
  • saidlow-pass filter comprises the series combination of an inductance element and a capacitance element connected in series with one an other, and wherein said direct current conducting portion of said low-pass filter comprises a portion of said low-pass filter inductance element.
  • a power recovery unidirectional potential boosting arrangement comprising in combination: connections placing said pulse stepup transformer primary winding in series with the discharge tube anode side of the deflection yoke winding, a storage capacitor connected in series with the discharge tube cathode side of the deflection winding, a low-pass filter circuit having predetermined frequency characteristics connected in shunt with said storage capacitor, said low-pass filter havin a portion thereof conductive to direct current, a unilaterally conductive clamping device connected to
  • Apparatus according to claim 25 wherein there is additionally provided means for varying the frequency response characteristics of said low-pass filter circuit whereby the current waveform through said deflection yoke may be adjusted.
  • said low-pass filter comprises the series combination of an inductance and capacitance, the inductance portion thereof constituting at least in part the direct current conductive portion of said low-pass filter.
  • Apparatus according to claim 25 wherein there is additionally provided a second low-pass filter connected between the deflection yoke winding side of said storage capacitorv and a power utilization means.
  • a first and second magnetically separated inductance elements connected in series with one another to form an inductance combination whose respective extremities define a first and second input terminals
  • a switch having an inherent open circuit shunt capacitance, connections placing said switch in series with said inductance combination and between one power supply terminal and the first input terminal of said inductance combination, a connection from said second input terminal of said inductance combination to said other power supply terminal, a storage capacitance connected in series with said inductance combination in its connection between said switch and said other power supply terminal, a unilaterally conductive damping device connected in shunt with the series combination formed by one of said inductance elements and said storage capacitance and means to open and close said switch.

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  • Details Of Television Scanning (AREA)
  • Treatments For Attaching Organic Compounds To Fibrous Goods (AREA)
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US90612A 1949-04-30 1949-04-30 Television deflection power recovery circuit Expired - Lifetime US2555831A (en)

Priority Applications (8)

Application Number Priority Date Filing Date Title
BE495378D BE495378A (xx) 1949-04-30
NL153232D NL153232C (xx) 1949-04-30
US90612A US2555831A (en) 1949-04-30 1949-04-30 Television deflection power recovery circuit
FR1017905D FR1017905A (fr) 1949-04-30 1950-04-13 Appareil de déviation du rayon cathodique avec récupération l'énergie
DER1572A DE976252C (de) 1949-04-30 1950-04-25 Schaltungsanordnung zur magnetischen Ablenkung eines Kathodenstrahls
CH291063D CH291063A (de) 1949-04-30 1950-04-26 Vorrichtung für elektromagnetische Kathodenstrahlablenkung.
ES0192729A ES192729A1 (es) 1949-04-30 1950-04-27 Un aparato desviador de rayos catodicos para circuitos de television
GB10526/50A GB672075A (en) 1949-04-30 1950-04-28 Television deflection power recovery circuits

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Application Number Priority Date Filing Date Title
US90612A US2555831A (en) 1949-04-30 1949-04-30 Television deflection power recovery circuit

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US2555831A true US2555831A (en) 1951-06-05

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US90612A Expired - Lifetime US2555831A (en) 1949-04-30 1949-04-30 Television deflection power recovery circuit

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US (1) US2555831A (xx)
BE (1) BE495378A (xx)
CH (1) CH291063A (xx)
DE (1) DE976252C (xx)
ES (1) ES192729A1 (xx)
FR (1) FR1017905A (xx)
GB (1) GB672075A (xx)
NL (1) NL153232C (xx)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2611106A (en) * 1949-07-20 1952-09-16 Motorola Inc Television sweep system
US2707206A (en) * 1950-12-08 1955-04-26 Hazeltine Research Inc Electromagnetic beam-deflection system for television receiver
US2708728A (en) * 1950-09-28 1955-05-17 Du Mont Allen B Lab Inc Cathode-ray deflection circuit
US2797358A (en) * 1952-05-03 1957-06-25 Emi Ltd Operating circuits for cathode ray tubes, especially in television receivers
US2809327A (en) * 1955-11-17 1957-10-08 Philco Corp Horizontal magnetic deflection system for television receivers
US2817782A (en) * 1954-07-09 1957-12-24 Rca Corp Cathode ray tube deflection apparatus
US2825846A (en) * 1955-05-03 1958-03-04 Motorola Inc Color television receiver

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2074495A (en) * 1934-09-29 1937-03-23 Rca Corp Circuits for cathode-ray tubes
US2308908A (en) * 1939-09-07 1943-01-19 Bahring Herbert Saw-tooth oscillator
US2370426A (en) * 1943-03-29 1945-02-27 Rca Corp Electron tube circuit
US2443030A (en) * 1946-11-09 1948-06-08 Gen Electric Picture size control circuit for television receivers
US2470197A (en) * 1946-09-25 1949-05-17 Rca Corp Electron beam deflection control system

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB482370A (en) * 1936-08-27 1938-03-28 Eric Lawrence Casling White Improvements in or relating to oscillatory electric circuits
CH221476A (de) * 1938-11-15 1942-05-31 Loewe Opta Gmbh Anordnung zur elektromagnetischen Ablenkung des Kathodenstrahls in Kathodenstrahlröhren.
DE757933C (de) * 1939-03-02 1953-06-15 Telefunken Gmbh Stromsaegezahngenerator

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2074495A (en) * 1934-09-29 1937-03-23 Rca Corp Circuits for cathode-ray tubes
US2308908A (en) * 1939-09-07 1943-01-19 Bahring Herbert Saw-tooth oscillator
US2370426A (en) * 1943-03-29 1945-02-27 Rca Corp Electron tube circuit
US2470197A (en) * 1946-09-25 1949-05-17 Rca Corp Electron beam deflection control system
US2443030A (en) * 1946-11-09 1948-06-08 Gen Electric Picture size control circuit for television receivers

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2611106A (en) * 1949-07-20 1952-09-16 Motorola Inc Television sweep system
US2708728A (en) * 1950-09-28 1955-05-17 Du Mont Allen B Lab Inc Cathode-ray deflection circuit
US2707206A (en) * 1950-12-08 1955-04-26 Hazeltine Research Inc Electromagnetic beam-deflection system for television receiver
US2797358A (en) * 1952-05-03 1957-06-25 Emi Ltd Operating circuits for cathode ray tubes, especially in television receivers
US2817782A (en) * 1954-07-09 1957-12-24 Rca Corp Cathode ray tube deflection apparatus
US2825846A (en) * 1955-05-03 1958-03-04 Motorola Inc Color television receiver
US2809327A (en) * 1955-11-17 1957-10-08 Philco Corp Horizontal magnetic deflection system for television receivers

Also Published As

Publication number Publication date
ES192729A1 (es) 1951-05-01
CH291063A (de) 1953-05-31
BE495378A (xx)
DE976252C (de) 1963-06-12
GB672075A (en) 1952-05-14
FR1017905A (fr) 1952-12-22
NL153232C (xx)

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