US2212173A - Periodic wave repeater - Google Patents

Periodic wave repeater Download PDF

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Publication number
US2212173A
US2212173A US236200A US23620038A US2212173A US 2212173 A US2212173 A US 2212173A US 236200 A US236200 A US 236200A US 23620038 A US23620038 A US 23620038A US 2212173 A US2212173 A US 2212173A
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United States
Prior art keywords
pulse
circuit
network
output
pulses
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Expired - Lifetime
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US236200A
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English (en)
Inventor
Harold A Wheeler
John C Wilson
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BAE Systems Aerospace Inc
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Hazeltine Corp
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Priority to BE436744D priority Critical patent/BE436744A/xx
Application filed by Hazeltine Corp filed Critical Hazeltine Corp
Priority to US236200A priority patent/US2212173A/en
Priority to GB27770/39A priority patent/GB538553A/en
Priority to DEH5435D priority patent/DE895310C/de
Priority to FR863338D priority patent/FR863338A/fr
Application granted granted Critical
Publication of US2212173A publication Critical patent/US2212173A/en
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N5/00—Details of television systems
    • H04N5/04—Synchronising
    • H04N5/06—Generation of synchronising signals
    • H04N5/067—Arrangements or circuits at the transmitter end
    • H04N5/0675—Arrangements or circuits at the transmitter end for mixing the synchronising signals with the picture signal or mutually
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03B—GENERATION OF OSCILLATIONS, DIRECTLY OR BY FREQUENCY-CHANGING, BY CIRCUITS EMPLOYING ACTIVE ELEMENTS WHICH OPERATE IN A NON-SWITCHING MANNER; GENERATION OF NOISE BY SUCH CIRCUITS
    • H03B19/00—Generation of oscillations by non-regenerative frequency multiplication or division of a signal from a separate source
    • H03B19/06—Generation of oscillations by non-regenerative frequency multiplication or division of a signal from a separate source by means of discharge device or semiconductor device with more than two electrodes
    • H03B19/08—Generation of oscillations by non-regenerative frequency multiplication or division of a signal from a separate source by means of discharge device or semiconductor device with more than two electrodes by means of a discharge device
    • H03B19/12—Generation of oscillations by non-regenerative frequency multiplication or division of a signal from a separate source by means of discharge device or semiconductor device with more than two electrodes by means of a discharge device using division only
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03K—PULSE TECHNIQUE
    • H03K3/00—Circuits for generating electric pulses; Monostable, bistable or multistable circuits
    • H03K3/02—Generators characterised by the type of circuit or by the means used for producing pulses
    • H03K3/04—Generators characterised by the type of circuit or by the means used for producing pulses by the use, as active elements, of vacuum tubes only, with positive feedback
    • H03K3/16—Generators characterised by the type of circuit or by the means used for producing pulses by the use, as active elements, of vacuum tubes only, with positive feedback using a transformer for feedback, e.g. blocking oscillator with saturable core
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N5/00—Details of television systems
    • H04N5/04—Synchronising
    • H04N5/06—Generation of synchronising signals
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N5/00—Details of television systems
    • H04N5/04—Synchronising
    • H04N5/06—Generation of synchronising signals
    • H04N5/067—Arrangements or circuits at the transmitter end
    • H04N5/073—Arrangements or circuits at the transmitter end for mutually locking plural sources of synchronising signals, e.g. studios or relay stations

Definitions

  • This invention relates to periodic-wave repeaters and, while the invention is of general application, the repeater of the invention is particularly suitable for deriving from a given wave a wave of submultiple frequency for use as a timing wave in a television-signal transmitter.
  • the invention is also of particular utility in oscillators for generating periodic pulses which are precisely timed by means of a delay network, the
  • timing of whichdoes not depend primarily on the materials utilized in the timing circuit.
  • a further embodiment of particular utility comprises the selection of synchronizing pulses for a television receiver out of other disturbances such 5 as static.
  • timing pulses in a modulatedcarrier television-signal transmitter some of which form component parts of the transmitted signal, it is customary to generate high-frequency D waves which are stabilized with respect to the source of alternating current at the transmitter and to derive therefrom waves of submultiple frequencies.
  • the submultiple frequency waves so developed are used for the Various timing op- 5 erations necessary to generate and transmit the composite television signal.
  • a high-fre- D quency wave for example, of 26,460 cycles, 'which is frequency-stabilized with respect to a source of E50-cycle power supplying the transmitter. From this high-frequency wave there is derived a submultiple-frequency wave of 13,230 cycles, that is,
  • a high degree of precision is essential in the relation between the frequencies of the diierent wave generators which go to make up the timer chain of the system. For this reason, it is customary to develop the waves in the manner described above rather than to generate waves of increasingly higher frequencies from .the lowfrequency source supplying the transmitter. However, in subdividing a generated high-fre- 0 quency wave to derive the waves of lower frequency, it is difcult to secure submultiple generators or frequency dividers for each of the steps which are not subject to some operating uncer- ⁇
  • Z50-36 er frequency is to produce pulses ofa frequency alternately charged from a direct-current source and discharged, one of the operations being controlled by a vacuum tube.
  • the active period of the tube depends not only upon the control Wave, usually applied to the control grid, but also upon the volta-ge of the condenser which is effectively coupled into the anode circuit of the tube and, therefore, effects its anode voltage.
  • the condenser is charged relatively slowly, either linearly or exponentially, and discharged rapidly, or vice versa.
  • the anode voltage varies by a substantial amount during the initial portion of the linear or exponential charge or discharge and the slope of the anode voltage wave during the nal portion of this period is of relatively low value, so that the control tube may be controlled by a Wrong pulse in the controlling Wave or by some extraneous iniiuence. That is, such a system is much too sensitive to controlling eiects on its control electrode during a substantial portion of the linear or exponential charging or discharging period.
  • Capacitance and inductance are stable electrical quantities'because they depend mainly on space dimensions rather than materials.
  • a concentrated resonant circuit made of capacitance and inductance has undesired inertia or ywheel eiect. This objection is overcome by dividing the capacitance and inductance along a transmission'line or among ⁇ the sections of a wave filter, either forming a delay network.
  • the network is made aperiodic by resista-nce termination matching its image impedance, whereby the flywheel effect is destroyed while retaining the advantage of timing by stable electrical quantitles.
  • a periodicwave repeater comprises a vacuum tube having sensitivity-determining and output circuits and feed-back means between the sensitivity-determining and output circuits having a time constant determined by an electrical delay network.
  • the term delay network is defined as one in which the time delay of an instantaneous sharp pulse transmitted through the network is at least twice as great as the broadening of the pulse by the network, the time delay being measured as the time interval between the transmitted pulse in the input circuit and the peak of the pulse in the output circuit of the network, and the broadening eiect being measured as the time duration of the output pulse at about half of peak amplitude, caused by its transmission through the network.
  • the word pulse refers to an electrical wave having a wave formI characterized by a steep leading portion or a steep trailing portion, or both, the amplitude of which approximates the amplitude of the wave, and the duration of which is an inappreciable fraction of the duration of the wave.
  • An input circuit or sensitivity-determining circuit of the tube is controlled normally to maintain the tube in a weak or inoperative condition and the delay network between the input and output circuits is adapted to supply a sensitizing pulse to the input, circuit of the tube to condition,
  • the tube for operation at a predetermined time interval after the next previous occurrence of a pulse in the output circuit.
  • synchronizing pulses are also applied to the input circuit of the wave generator and the time at which the generator is triggered is dependent upon the joint occurrence of a synchronizing pulse and a pulse fed back by the delay network. In the absence of either of these two pulses, therefore, the generator fails 'to operate.
  • the synchronizing circuit may be omitted and the period of the oscillator may be controlled solely by the precisely timed pulses which are fed back to the input circuit of the oscillator from the delay network, in which case the input circuit is designed to condition the tube for operation and thereby to trigger the generator on the occurrence of a single pulse.
  • FIGs. 1, 3 and 5 are circuit diagrams of different embodiments of the invention while Figs. 2, 4 and 6 illustrate certain operating characteristics of the circuits of Figs. 1, 3 and 5, respectively.
  • a relaxation oscillator which is timed by a pulse transmitted in one direction through a line or filter networkv Aoperating as a delay network.
  • the relaxation oscillator comprises a high-vacuum tube I0 connected to discharge periodically and abruptly a condenser II which is slowly charged in the meantime from a direct-current circuit comprising a battery I2 and a resistor I3.
  • Vacuum tube III has a control grid which is normally biased partially or completely to cutoff by a battery I4 through a resistor I5.
  • the vacuum tube under control of its grid bias normally has a relatively low or even zero repeating sensitivity.
  • a feed-back coupling comprising an inductor I6 in the output circuit of tube I0 inductively coupled to an inductor I'I in the input circuit thereof.
  • the feed-back circuit including inductors I6 and II may be omitted from the circuit in case a vapor or gaseous electron-discharge tube of Thyratron type is utilized.
  • synchronizing signals may be applied to the input circuit of vacuum tube Ill from a suitable source I8.
  • a feed-back circuit comprising a delay network 24 is included between the output and input circuits of the wave generator.
  • This delay vnetwork may be a smooth uniform transmission line or a smooth artificial line or a lter composed of lumped reactance elements and is shown as a simple uniform transmission line of unbalanced form having input terminals I9 and output terminals
  • the transmission line is terminated in its image impedance at one or both of its pairs of terminals by means of resistors 2
  • the end I9 is connected in the cathode circuit of vacuum tube I0 while the end 20 is included in the input circuit of tube I0 in series with the source of synchronizing signals I8.
  • Curve 2a represents a synchronizing signal having one or several pulses per cycle, three being shown, for example.
  • the device operates as a. frequency divider by synchronizing at a submultiple frequency.
  • Curve 2b shows the starting pulse of plate current which may be initiated by decreasing the negative grid bias of battery I4 during the occurrence of a synchronizing pulse. This pulse is built up by the feedback through inductors I6, I1 of therelaxation oscillator, and is quickly chopped offby the charging of condenser II.
  • the pulse of cathode current at terminals I9 at the input end of the transmission line 24 causes a voltage pulse of positive polarity to travel along the line toward terminals 20.
  • Curve 2c shows the later arrival of the pulse of curve 2b at the output end of the line, terminals 20, from which it is applied as a sensitizing pulse to the grid circuit of tube I0.
  • Curve Zd shows the resultant of curve 2a, curve 2b, and curve 2c, and is the wave form of the resultant voltage applied to the grid of vacuum tube I0.
  • vacuumtube I0 has a relatively low repeating sensitivity or is inoperative over the greater portion of the cycle Aand is conditioned for operation, or caused to have a relatively high repeating sensitivity, by the senstizing pulses applied from the delay network 24, in each instance at the time of the occurrence of the desired synchronizing pulse in the input circuit of the wave generator, thereby rendering the periodic-wave generator absolutely insensitive to undesired controlling influences until the time it is desired to eect operation by a selected synchronizing pulse.
  • the source of synchronizing signals I8 may be omitted, in which case the periodicity of the wave generator of Fig. 1 is controlled solely by the constants of line 24.
  • the eriodic-wave generator of Fig. 3 is essentially similar to that of Fig. 1 and similar circuit elements have been given identical reference numerals.
  • the circuit of Fig. 3 differs from that of Fig. 1 primarily in that the delay network 24 of Fig. l, which is included in the cathode circuit of the oscillator tube, is replaced by a delay network comprising low-pass filter 34 in the circuit of Fig. 3.
  • the input pair of terminals, comprising terminals 29, of network 34 areterminated in resistance equal to the image impedance, represented by a resistor 3l and are coupled in series with condenser I I in the output circuit of vacuum tube Il).
  • Output terminals 29' are provided for network 34.
  • Network 34 is terminated at terminals 3U in an impedance, shown as variable resistor 3l', much less than its image impedance so as to reect a pulse of opposite polarity back to the output terminals 29', the reected pulse,
  • Curve 4a shows the negative pulse which is applied to the network 34 from the anode circuit of vacuum tube I0; there are two output pulses shown by curve 4b, the latter of which occurs after a delay of one period as described above. It is immaterial, in the usual case, as to how much the intermediate pulse is delayed. In Fig'. 4b it has been timed to coincide with the last spurious synchronizing pulse of curve 2d so as to lessen the probability of this spurious pulse tripping the oscillator. economy in the total length of the delay network the intermediate pulse should occur just after For the beginning of Athe period.
  • the amplitude of the feed-back pulse of the circuit of Fig. 3 is controlled by adjusting thev value of resistor 3l'.
  • the reflected pulse is greatest when this resistance is zero, ornwhen nizing pulses, if applied, will control the precise timing of the oscillations if the synchronizing pulses occur at such'time as to be superimposed on the delayed positive pulses from the delay network in the same manner described in more ldetail in the explanation with reference to the circuit of Fig. 1.
  • the feedback circuit comprising inductances I6 and I'I-can Ibe omitted in the circuits of Figs. 1 and 3 and that the vacuum tube II! in such case acts merely as a repeater for the signals applied to its input circuit.
  • Fig. 5 is a circuit diagram of a periodic-wave generator in which feedback from the output circuit to the input circuit of the oscillator tube is provided only through a delay network so the oscillator fails to operate in the absence of the delay network. Elements which are similar to those of the circuit of Fig. 1 have been given identical reference numerals.
  • the circuit comprises a delay network 44 having input terminals 39 and output terminals 40 properly terminated -to prevent multiple reflection by means of one or both of resistors 4
  • Curve 6a represents a negative voltage step applied to the input terminals of the line by closing the anode circuit of the oscillator.
  • the negative voltage step of curve 6a is delayed through the network 44 and applied to the grid of tube I0 as a delayed step shown by curve 6b.
  • 'Ihis process of repeated delay and reversal produces a further succession of steps represented by curves 6d to 6g.
  • the resultant of these steps is a succession of negative pulses of rectangular wave form in the input and output circuits of tube l0.
  • Curve 6h shows the negative pulses of anode voltage of rectangular wave form while curve i shows the corresponding negative pulses of grid voltage.
  • the period of oscillation of the generator is twice the delay of the network 44.
  • the operation of the circuit of Fig. 5 is somewhat similar to that of Fig. 3.
  • the pulse travels through the line twice in the same direction within a single cycle, instead of traversing a portion of the line once and being reected back, as in the case of the circuit of Fig. 3.
  • control-electrode coupling condenser in Figs. 1 and 3 together with vresistor l5 may be utilized as the time-constant circuit of the repeaters in place of condenser l l and resistor I3 in a. manner well understood in the art.
  • Theoretically the operation of the system is affected by both the time constant of the grid-cathode circuit and that of the anodecathode circuit. In practice, however, it is customary to make one of the time constantsthe controlling factor and the other so great as to leave little eiect on the operation of the system.
  • a periodic-wave repeater for producing periodic output pulses comprising, a vacuum-tube repeater stage including input and output circuits one of which comprises a sensitivity-controlling circuit, means included in said repeater stage for imparting thereto a relatively low repeating sensitivity in the absence of a sensitizing pulse applied thereto and a relatively high repeating sensitivity in the presence of a sensitizing pulse, a delay network having a time delay approximately equal to the period of the output pulses, means for applying to said delay network an input pulse occurring at the time a given output pulse of said repeater is due, and means including said network for applying to said sensitivity-controlling circuit, in response to said input pulse to said network, a sensitizing pulse delayed by said time delay and having such polarity as to sensitize said vacuum tube for operation at the time the succeeding output pulse from said repeater is due.
  • a periodic-wave repeater for producing periodic output pulses comprising, an output circuit and an input circuit which comprises a vacuumtube repeater stage including an output circuit and an input circuit which comprises a sensitiv ⁇ ity-controlling circuit, means included in said repeater stage for imparting thereto a relatively low repeating sensitivity in the absence of a sensitizing pulse applied thereto and a relatively high repeating sensitivity in the presence of a sensitizing pulse, a delay network having a time delay approximately equal to an integral multiple of the period of said output pulses, means for applying to said delay network an input pulse occurring at the time a given output pulse of said repeater is due, and means including said network for applying to said sensitivity-controlling circuit, in response to each input pulse to said network, a pulse delayed by said time delay and having such polarity as to sensitize said vacuum tube for operation at the time a later output puls from said-repeater is due.
  • a periodic-Wave repeater for producing periodic output pulses comprising, a vacuum-tube repeater having a sensitivity-controlling circuit and an output circuit, a delay network having a time delay approximately equal to the period of said output pulses, means for applying to said delay network an input pulse occurring at the time a given output pulse of said repeater is due to develop a delayed sensitizing pulse occurring substantially at the time a later output pulse is due, and means including said network coupled between said output circuit and said sensitivitycontrolling circuit for biasing said vacuum tube substantially to cut off to desensitize said vacuum tube for operation after each output pulse until said delayed sensitizing pulse is applied to said sensitivity-'controlling circuit.
  • a periodic-wave generator for producing periodic output pulses in synchronism with input pulses thereto comprising, a vacuum-tube repeater stage having a sensitivity-controlling circuit and an output circuit, means included in said repeater stage for impartingthereto a relatively low repeating sensitivity in the absence of a sensitizing pulse applied thereto and a relatively high repeating sensitivity in the presence of a sensitizing pulse, a delay network having a time delay approximately equal to the period of said output pulses, means for applying to said delay network a pulse occurring at the time a given output pulse of said repeater is due, and means including said network for applying to said sensitivity-controlling circuit, in response to said pulse applied to said network, a voltage including v a pulse delayed by said time delay for sensitizing said vacuum tube for operation by each delayed pulse from said network at the time the succeeding pulse from said generator is due.
  • a periodic-wave repeater for producing periodic output pulses in synchronism with input pulses thereto comprising, a vacuum-tube repeater stage having a sensitivity-controlling circuit and an output circuit, means included in said4 repeater stage for imparting thereto a relatively low repeating sensitivity in the absence of a sensitizing pulse applied thereto and a relatively high repeating sensitivity in the presence of a sensitizing pulse, a delay network having a-time delay substantially equal to the period of said input pulses, means for applying to said delay network a pulse occurring at the time a given output pulse of said repeater is due, and means including said network for applying to said sensitivity-controlling circuit, in response to said pulse applied to said network, a. voltage including a sensitizing pulse delayed with said time delay for sensitizing said vacuum tube for operation by each delayed pulse from said delay network at the time the succeeding input pulse to said repeater is due.
  • a periodic-wave repeater for producing periodic output pulses in synchronization with predetermined ones of synchronizing pulses applied thereto comprising, a vacuum-tube repeater normally biased substantially to cut off and having a sensitivity-controlling circuit and an output circuit, means for applying to one of said circuits said synchronizing pulses, a delay network having a time delay substantially equal to the period of said predetermined ones of said synchronizing pulses, means for applying to said time-delay network an input pulse occurring at the time an output pulse of said repeater is due, and means including said network for applying to said sensitivity-controlling circuit, in response to said input pulses to said network, a pulse delayed by said time delay for sensitizing said vacuum tube for operation by each delayedpulse from said delay network at the time the succeeding output pulse from said generator is due.
  • a periodic-wave repeater for producing periodic output pulses comprising, a vacuum tube having an output circuit and a sensitivity-controlling circuit, a delay network having a time delay approximately equal to the period of the output pulses, said network being a low-pass lter having a plurality of sections, whereby its time delay is much greater than its widening effect, means for applying to said delay network an input pulse occurring at the time a given output pulse of said repeater is due, a resistance termination substantially preventing reflection at one end of said lter, and coupling means including said network for coupling said output circuit to said sensitivity-controlling circuit with such polarity as to sensitize said vacuum tube for operation by each output pulse from said delay network at the time the succeeding output pulse from said repeater is due.
  • a periodic-wave repeater for producing periodic output pulses comprising, a vacuum tube having a sensitivity-controlling circuit and an output circuit, a delay network having a .time delay approximately equal to the period of the output pulses, said network comprising a lowpass filter having a plurality of sections for providing time delay much greater than its widening effect, a resistance termination substantially preventing reiiection at one end of said filter, a mismatched termination at the other end of said lter for causing Ithe desired pulse to traverse twice the part of said lter adjacent said other end, and means including said network for coupling said output circuit to said sensitivitycontrolling circuit with such polarity as to sensitize said vacuum tube by each output pulse from said network at the time the succeeding output pulse from said repeater is due.
  • a periodic-wave repeater for producing periodic output pulses comprising, a vacuum tube havingan output circuit and an input circuit adapted for negative-bias control of its'sensitivity, means including a delay network coupling said output circuit to said input circuit, said network comprising a multi-section low-pass filter with a pair of terminals at each end and an intermediate pair of terminals, a resistance less than its image impedance connected with one of said end pairs of terminals to provide a voltagereversing reflecting termination, the other two pairs of said terminals being connected, respectively, in said input and output circuits, and a resistance matching the image impedance of said iilter at one of said other pairs of terminals to provide a non-reilecting termination, rwhereby each negative output pulse oi' said vacuum tube is delayed and reversed in said network and appears as a positive pulse in said input circuit for sensitizing said repeater.

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US236200A 1938-10-21 1938-10-21 Periodic wave repeater Expired - Lifetime US2212173A (en)

Priority Applications (5)

Application Number Priority Date Filing Date Title
BE436744D BE436744A (en(2012)) 1938-10-21
US236200A US2212173A (en) 1938-10-21 1938-10-21 Periodic wave repeater
GB27770/39A GB538553A (en) 1938-10-21 1939-10-12 Improvements in electric periodic wave repeaters and generators
DEH5435D DE895310C (de) 1938-10-21 1939-10-17 Fremdgesteuerte oder selbsterregte Schaltung zur Lieferung einer Reihe periodischer Impulse, beispielsweise fuer Fernsehzwecke
FR863338D FR863338A (fr) 1938-10-21 1940-02-09 Répétiteur d'ondes périodiques

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US236200A US2212173A (en) 1938-10-21 1938-10-21 Periodic wave repeater

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US2212173A true US2212173A (en) 1940-08-20

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BE (1) BE436744A (en(2012))
DE (1) DE895310C (en(2012))
FR (1) FR863338A (en(2012))
GB (1) GB538553A (en(2012))

Cited By (48)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2418127A (en) * 1942-12-01 1947-04-01 Standard Telephones Cables Ltd Filter system
US2423999A (en) * 1943-10-18 1947-07-15 Farnsworth Television & Radio Impulse generator
US2426187A (en) * 1941-12-19 1947-08-26 Standard Telephones Cables Ltd Pulsed carrier frequency demodulator
US2429809A (en) * 1942-09-17 1947-10-28 Gen Electric Radio locating equipment
US2433379A (en) * 1941-04-04 1947-12-30 Standard Telephones Cables Ltd Generation of electrical impulses
US2434921A (en) * 1944-11-02 1948-01-27 Standard Telephones Cables Ltd Pulse amplitude selective system
US2434922A (en) * 1944-11-02 1948-01-27 Standard Telephones Cables Ltd Pulse amplitude selector system
US2436808A (en) * 1941-07-08 1948-03-02 Standard Telephones Cables Ltd Multivibrator
US2445448A (en) * 1944-07-27 1948-07-20 Rca Corp Electron discharge device trigger circuit
US2447082A (en) * 1944-06-29 1948-08-17 Rca Corp Generator circuit
US2458574A (en) * 1943-04-10 1949-01-11 Rca Corp Pulse communication
US2462109A (en) * 1943-04-28 1949-02-22 Int Standard Electric Corp Synchronized pulse generator
US2468058A (en) * 1943-11-23 1949-04-26 Standard Telephones Cables Ltd Blocking system for multichannel operation
US2482974A (en) * 1946-04-30 1949-09-27 Bendix Aviat Corp Frequency multiplier having an output of pulse groups
US2482973A (en) * 1946-04-30 1949-09-27 Bendix Aviat Corp Frequency multiplier
US2487995A (en) * 1941-05-26 1949-11-15 Samuel M Tucker Pulse echo receiver with regenerative feedback
US2489303A (en) * 1942-04-06 1949-11-29 Lifschutz Harold Counter frequency divider without time delay
US2493379A (en) * 1945-02-16 1950-01-03 Eric W Anderson Pulse generating circuit
US2509433A (en) * 1942-06-27 1950-05-30 Radio Electr Soc Fr Generator of electrical oscillations
US2510167A (en) * 1948-03-25 1950-06-06 Philco Corp Pulse generator and starting circuit therefor
US2537113A (en) * 1945-03-06 1951-01-09 William M Yost Multiple pulse generator
US2538277A (en) * 1947-02-14 1951-01-16 Rca Corp Frequency divider
US2538278A (en) * 1947-03-04 1951-01-16 Rca Corp Frequency divider
US2543730A (en) * 1948-12-30 1951-02-27 Thomas F C Muchmore Self-triggering thyratron pulse generator
US2544407A (en) * 1946-05-02 1951-03-06 Raytheon Mfg Co Electrical circuits
US2564000A (en) * 1944-01-13 1951-08-14 Francis J Gaffney Pulse generator system
US2574207A (en) * 1947-05-23 1951-11-06 Brush Dev Co Magnetic recording and reproducing
US2601289A (en) * 1946-04-26 1952-06-24 Int Standard Electric Corp Reiterating system
US2613276A (en) * 1949-01-07 1952-10-07 John H Homrighous Multiplex time division radiophone system
US2616047A (en) * 1948-03-13 1952-10-28 Philco Corp Pulse generator
US2629827A (en) * 1947-10-31 1953-02-24 Eckert Mauchly Comp Corp Memory system
US2650357A (en) * 1947-11-13 1953-08-25 Philco Corp Delay controlled pulse generator
US2659080A (en) * 1945-08-01 1953-11-10 Adalbert E Benfield Self-synchronous moving target indication system
US2679040A (en) * 1949-07-25 1954-05-18 Electronique & Automatisme Sa Electrical impulse transmitting device
US2687473A (en) * 1950-04-13 1954-08-24 Remington Rand Inc Signal cycling device
US2716159A (en) * 1949-10-19 1955-08-23 Flowers Thomas Harold Register translators
US2740109A (en) * 1946-12-19 1956-03-27 Hazeltine Research Inc Pulse generator
US2750510A (en) * 1952-01-16 1956-06-12 Rca Corp Free-running square wave generator
US2769088A (en) * 1953-05-11 1956-10-30 Hoffman Electronics Corp Oscillator
US2782305A (en) * 1951-11-23 1957-02-19 Ibm Digital information register
US2784310A (en) * 1946-01-08 1957-03-05 Eugene W Cowan Pulse width selecting filter
US2827566A (en) * 1954-12-30 1958-03-18 Underwood Corp Frequency changer
US2843738A (en) * 1952-11-28 1958-07-15 Philips Corp Circuit arrangement for producing pulses
US2866091A (en) * 1953-12-29 1958-12-23 Gen Electric Pulse processing system
US2889456A (en) * 1955-07-22 1959-06-02 Ibm Blocking oscillator having sharp pulse cut-off
US2912583A (en) * 1957-02-11 1959-11-10 Jr Bernard H Geyer Regeneration delay line storage system
US2990515A (en) * 1946-12-13 1961-06-27 Philco Corp Multiple signal delay device
US3265975A (en) * 1963-12-19 1966-08-09 Ibm Delay line controlled pulse generator

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1083317B (de) * 1956-09-28 1960-06-15 Siemens Ag Laufzeitglied zur durch einen Taktpuls synchronisierten Verschiebung von Impulsen

Cited By (48)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2433379A (en) * 1941-04-04 1947-12-30 Standard Telephones Cables Ltd Generation of electrical impulses
US2487995A (en) * 1941-05-26 1949-11-15 Samuel M Tucker Pulse echo receiver with regenerative feedback
US2436808A (en) * 1941-07-08 1948-03-02 Standard Telephones Cables Ltd Multivibrator
US2426187A (en) * 1941-12-19 1947-08-26 Standard Telephones Cables Ltd Pulsed carrier frequency demodulator
US2489303A (en) * 1942-04-06 1949-11-29 Lifschutz Harold Counter frequency divider without time delay
US2509433A (en) * 1942-06-27 1950-05-30 Radio Electr Soc Fr Generator of electrical oscillations
US2429809A (en) * 1942-09-17 1947-10-28 Gen Electric Radio locating equipment
US2418127A (en) * 1942-12-01 1947-04-01 Standard Telephones Cables Ltd Filter system
US2458574A (en) * 1943-04-10 1949-01-11 Rca Corp Pulse communication
US2462109A (en) * 1943-04-28 1949-02-22 Int Standard Electric Corp Synchronized pulse generator
US2423999A (en) * 1943-10-18 1947-07-15 Farnsworth Television & Radio Impulse generator
US2468058A (en) * 1943-11-23 1949-04-26 Standard Telephones Cables Ltd Blocking system for multichannel operation
US2564000A (en) * 1944-01-13 1951-08-14 Francis J Gaffney Pulse generator system
US2447082A (en) * 1944-06-29 1948-08-17 Rca Corp Generator circuit
US2445448A (en) * 1944-07-27 1948-07-20 Rca Corp Electron discharge device trigger circuit
US2434922A (en) * 1944-11-02 1948-01-27 Standard Telephones Cables Ltd Pulse amplitude selector system
US2434921A (en) * 1944-11-02 1948-01-27 Standard Telephones Cables Ltd Pulse amplitude selective system
US2493379A (en) * 1945-02-16 1950-01-03 Eric W Anderson Pulse generating circuit
US2537113A (en) * 1945-03-06 1951-01-09 William M Yost Multiple pulse generator
US2659080A (en) * 1945-08-01 1953-11-10 Adalbert E Benfield Self-synchronous moving target indication system
US2784310A (en) * 1946-01-08 1957-03-05 Eugene W Cowan Pulse width selecting filter
US2601289A (en) * 1946-04-26 1952-06-24 Int Standard Electric Corp Reiterating system
US2482974A (en) * 1946-04-30 1949-09-27 Bendix Aviat Corp Frequency multiplier having an output of pulse groups
US2482973A (en) * 1946-04-30 1949-09-27 Bendix Aviat Corp Frequency multiplier
US2544407A (en) * 1946-05-02 1951-03-06 Raytheon Mfg Co Electrical circuits
US2990515A (en) * 1946-12-13 1961-06-27 Philco Corp Multiple signal delay device
US2740109A (en) * 1946-12-19 1956-03-27 Hazeltine Research Inc Pulse generator
US2538277A (en) * 1947-02-14 1951-01-16 Rca Corp Frequency divider
US2538278A (en) * 1947-03-04 1951-01-16 Rca Corp Frequency divider
US2574207A (en) * 1947-05-23 1951-11-06 Brush Dev Co Magnetic recording and reproducing
US2629827A (en) * 1947-10-31 1953-02-24 Eckert Mauchly Comp Corp Memory system
US2650357A (en) * 1947-11-13 1953-08-25 Philco Corp Delay controlled pulse generator
US2616047A (en) * 1948-03-13 1952-10-28 Philco Corp Pulse generator
US2510167A (en) * 1948-03-25 1950-06-06 Philco Corp Pulse generator and starting circuit therefor
US2543730A (en) * 1948-12-30 1951-02-27 Thomas F C Muchmore Self-triggering thyratron pulse generator
US2613276A (en) * 1949-01-07 1952-10-07 John H Homrighous Multiplex time division radiophone system
US2679040A (en) * 1949-07-25 1954-05-18 Electronique & Automatisme Sa Electrical impulse transmitting device
US2716159A (en) * 1949-10-19 1955-08-23 Flowers Thomas Harold Register translators
US2687473A (en) * 1950-04-13 1954-08-24 Remington Rand Inc Signal cycling device
US2782305A (en) * 1951-11-23 1957-02-19 Ibm Digital information register
US2750510A (en) * 1952-01-16 1956-06-12 Rca Corp Free-running square wave generator
US2843738A (en) * 1952-11-28 1958-07-15 Philips Corp Circuit arrangement for producing pulses
US2769088A (en) * 1953-05-11 1956-10-30 Hoffman Electronics Corp Oscillator
US2866091A (en) * 1953-12-29 1958-12-23 Gen Electric Pulse processing system
US2827566A (en) * 1954-12-30 1958-03-18 Underwood Corp Frequency changer
US2889456A (en) * 1955-07-22 1959-06-02 Ibm Blocking oscillator having sharp pulse cut-off
US2912583A (en) * 1957-02-11 1959-11-10 Jr Bernard H Geyer Regeneration delay line storage system
US3265975A (en) * 1963-12-19 1966-08-09 Ibm Delay line controlled pulse generator

Also Published As

Publication number Publication date
DE895310C (de) 1953-11-02
GB538553A (en) 1941-08-08
FR863338A (fr) 1941-03-29
BE436744A (en(2012))

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