US2556179A - Multiple pulse producing system - Google Patents

Multiple pulse producing system Download PDF

Info

Publication number
US2556179A
US2556179A US651651A US65165146A US2556179A US 2556179 A US2556179 A US 2556179A US 651651 A US651651 A US 651651A US 65165146 A US65165146 A US 65165146A US 2556179 A US2556179 A US 2556179A
Authority
US
United States
Prior art keywords
pulse
pulses
circuit
distributor
shaping
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 - Lifetime
Application number
US651651A
Other languages
English (en)
Inventor
Donald D Grieg
Arnold M Levine
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.)
International Standard Electric Corp
Original Assignee
International Standard Electric Corp
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 International Standard Electric Corp filed Critical International Standard Electric Corp
Priority to US651651A priority Critical patent/US2556179A/en
Priority to ES0178879A priority patent/ES178879A1/es
Priority to FR950154D priority patent/FR950154A/fr
Priority to BE474954D priority patent/BE474954A/xx
Application granted granted Critical
Publication of US2556179A publication Critical patent/US2556179A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04J—MULTIPLEX COMMUNICATION
    • H04J3/00—Time-division multiplex systems
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04J—MULTIPLEX COMMUNICATION
    • H04J3/00—Time-division multiplex systems
    • H04J3/02—Details
    • H04J3/04—Distributors combined with modulators or demodulators
    • H04J3/045—Distributors with CRT
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04J—MULTIPLEX COMMUNICATION
    • H04J3/00—Time-division multiplex systems
    • H04J3/02—Details
    • H04J3/08—Intermediate station arrangements, e.g. for branching, for tapping-off

Definitions

  • This invention relates to multiple pulse producing systems and more particularly to systems for. producing multiplicity of pulse series of proper r. suitable shapes ,for the purpose of niodulation .or demodulation in the multiplex pulse time .circuit.
  • rSystems have been'proposed for multiplexing -pu1se circuits wherein the time division of the separatechannels is effected through means of ("an electronic distributor.
  • tributor preferably-comprises a cathode ray type distributor circuit wherein the beam is cyclically swept over a plurality of targets ordistributor This electronic disseg-ments.
  • 1 ,It is. an object of our invention to provide a simple system for producing and shaping pulses.
  • shaping means to, form pulses into a predetermined shape having a substantially confstant finite slope and adjacent portions of substantially infinite slope.
  • I-t' is a still "further .obiectof our invention to ilproduce-pulse waves of desired shape for modulating or demodulating of pulse position sysso as effectively to vary the position of pulses in accordance with signals to be transmitted.
  • a feature of our invention includes means for so shaping the output pulses produced at the target electrodes that a wave having a constant slope portion will be produced. This may be accomplished most simply by providing a shaping circuit comprising a shunt condenser and resistor arrangement which will produce from the output pulses substantially triangular waves.
  • each pulse is shaped to have a substantially infinite slope pedestal portion topped by a sawtooth triangular wave. At the upper edge of the sawtooth triangular wave is provided also a portion of substantially infinite slope.
  • vFig. 1 is a circuit diagram of a distributor and pulse clipping circuit incorporating the features of our invention
  • Fig. 2 is a graphical representation showing curves helping to explain the operation of our sy em
  • Rig. 3 illustrates amodified block circuit diagram of a shaping circuit made in accordance with the features of our invention.
  • Fig. 4- is a schematic circuit diagram illustrating how the cross elements shown in Fig. 3 may be substantially. combined in a single circuit.
  • FIG. 1 an electronic distributor tube is illustrated at' I.
  • High voltage supply 2 and filament transform-er 3 furnish the operating potentials for distributor tube 5.
  • a conventional cathode 1 and concentrating grids 5 and 6 followed by the accelerating electrode i.
  • As set of four deflecting plates is indicated at 8 coupled to beam centering resist-.
  • ance elements 9 Two-phase energy from sup:-
  • 3 ply source I is applied to deflecting plates 8 to produce cyclic rotation of the electron beam Within tube I.
  • a voltage dividing resistor comprising resistance elements H, [2, l3 and 9 is connected to the negative pole of high voltage supply 2. Potentiometer resistors H and I2 are used to provide the desired voltage on grids and 6. Accelerating electrode 1 is coupled directly to the positive potential side of high voltage supply 2.
  • the resistance voltage divider is grounded at M intermediate resistors l2 and I3. It has been found that this grounding helps prevent cross-talk in this type of distributor tube.
  • An aperture plate I5 is provided coupled to the high voltage supply 2 and to one end of resistors 9. Opposite each aperture of plate [5 is provided individual target electrodes illustrated at i6, i7 and I8. These individual electrodes are coupled to individual output lines I9, and 2! respectively.
  • each of the output lines is provided with a modulator. Only one such modulator is indicated at 22 coupled to output line 2
  • a variable position gate clipper is provided followed by a diiferentiating circuit so that output pulses timed with respect to the input voice signals may be produced.
  • shaping networks 23, 2d and 25, for example, which are connected to the respective lines I9, 20 and 2
  • networks may comprise condenser-resistor combinations which will produce substantially triangular waves.
  • Curves a and b of Fig. 2 illustrate output waves which may be obtained from two adjacent lines such as 20 and 2 i, for example.
  • pulses are produced as shown at 26 and 2i which coincide in time with the impinging of the distributor beam on the target I'l.
  • These pulses are substantially triangular in shape and the leading edge is shown particularly linear.
  • a gate clipper may be provided clipping the wave between levels 28 and 29. Signal modulation may serve to vary the level of gate clipper without changing the separation between levels 28 and 29 so that in accordance with the modulating signal the gate is varied up and down.
  • pulses may be produced having time positions variable in accordance with the level of the gate. It will be noted that in the succeeding line which may, for example, be line 2
  • the gate clipper provided may be at a difierent level for this channel as indicated by lines 3 l, 32. It will be understood that as many circuits are to be provided as there are target electrodes in the distributor so that a multiple series of pulses may be produced in this fashion.
  • Fig. 1 While we have shown in Fig. 1 the particular type of shaping circuit producing triangular waves such as shown in curves a and b of Fig. 2,
  • Modulator 22 may, for example, be of i As shown in Fig. 1, these it is clear that should the gate level be varied to a point below the lower end of pulses 26 or 30 or to a point thereabove, extraneous signals or distortion providing excessive pulse displacement might occur causing cross-talk between adjacent channels.
  • a pulse shaping network may be provided to produce pulses shaped in accordance with curve I of Fig. 2. Such pulses will be seen to have a sloping portion 33 flanked by portions of substantially infinite slope as shown at 34 and 35.
  • a pulse shaping circuit which may be coupled in the output of each of the distributor electrodesof a. distributor such as shown in Fig. l for the purpose of providing waves substantially as shown in curve of Fig. 2.
  • a pulse source 38 produces substantially rectangular pulses.
  • These pulses may be fed into a sawtooth pulse shaper 39 to produce an outputsawtooth pulse 49, to a differentiating circuit 4
  • These three pulse elements may be combined in a common mixer 45 to provide the output composite pulse 5%. It will be seen that pulse 46 has substantially the same shape as the composite pulse in curve I.
  • Curves c, d and e illustrate more clearly how this composite pulse is formed.
  • a rectangular pedestal portion 4'! is shown in curve 0, the triangular sawtooth portion 48 in curve d and the differentiated pulse portion 49 in curve e.
  • the negative portion of the differentiated pulses of curve e may be eliminated. However, if these are not eliminated, this portion being negative will have no substantial affect on the pulses when passed through the individual modulators.
  • Fig. 4 illustrates a circuit arrangement which may incorporate the various elements of Fig. 3 substantially in a single circuit.
  • tube 53 may, for example, be coupled to an'output distributor electrode of a tube such as shown in Fig. 1.
  • a composite network consisting of a resistor ele-' ment 5
  • resistor 5! the voltage drop of the rectangular wave applied to tube 5:] will produce a substantially rectangular wave portion 4'5 as illustrated.
  • the condenser-resistor combination 52 will produce a sawtooth wave portion G8 as shown and the diiferentiating coil 53 will produce the pulses shown at 43.
  • a multiple pulse forming circuit comprising an electron beam distributor provided with separate distributor segments for producing separate series of timed pulses, and individual shaper means operatively associated with each distributor segment for individually shaping the pulses of each series, said shaper means comprising means for producing a substantially rectangular pedestal :pulse, means for producing a sawtooth pulse of the same duration as said rectangular pulse, means for producing a substantially linear pulse coinciding substantially with one edge of said sawtooth and rectangular pulse, and means for combining said pulses into a composite pulse.
  • a system for providing base wave pulses for use in a pulse time modulating circuit comprising an electron beam distributor, separate targets for receiving energy pulses from the electron beam of said distributor, and shaping means for said pulses comprising means for producing a substantially rectangular pulse, means for producing a substantially sawtooth shaped pulse, means for producing a substantially linear pulse of substantially infinite slope, and means for combining said pulses to produce a composite pulse.
  • said shaping means includes an electron discharge tube, and a series circuit including said pulse producing means in the output circuit of said tube to produce and combine said pulses in a single circuit.

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Particle Accelerators (AREA)
  • Manipulation Of Pulses (AREA)
US651651A 1946-03-02 1946-03-02 Multiple pulse producing system Expired - Lifetime US2556179A (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
US651651A US2556179A (en) 1946-03-02 1946-03-02 Multiple pulse producing system
ES0178879A ES178879A1 (es) 1946-03-02 1947-07-11 MEJORAS EN SISTEMAS PRODUCTORES DE IMPULSOS MuLTIPLES
FR950154D FR950154A (fr) 1946-03-02 1947-07-25 Systèmes générateurs d'impulsions électriques multiples
BE474954D BE474954A (en, 2012) 1946-03-02 1947-07-31

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US651651A US2556179A (en) 1946-03-02 1946-03-02 Multiple pulse producing system

Publications (1)

Publication Number Publication Date
US2556179A true US2556179A (en) 1951-06-12

Family

ID=24613667

Family Applications (1)

Application Number Title Priority Date Filing Date
US651651A Expired - Lifetime US2556179A (en) 1946-03-02 1946-03-02 Multiple pulse producing system

Country Status (4)

Country Link
US (1) US2556179A (en, 2012)
BE (1) BE474954A (en, 2012)
ES (1) ES178879A1 (en, 2012)
FR (1) FR950154A (en, 2012)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2659837A (en) * 1949-03-29 1953-11-17 Gen Electric Sweep linearity control circuit
US2823274A (en) * 1954-08-04 1958-02-11 Du Mont Allen B Lab Inc Adjustable sweep circuit

Citations (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2214019A (en) * 1937-10-30 1940-09-10 Bell Telephone Labor Inc Electronic switching device
US2223001A (en) * 1939-04-24 1940-11-26 Farnsworth Television & Radio High efficiency amplifier
US2224677A (en) * 1939-03-23 1940-12-10 Bell Telephone Labor Inc Signaling system
US2229700A (en) * 1937-06-09 1941-01-28 Radio Patents Corp Selective space discharge device
US2242934A (en) * 1938-11-04 1941-05-20 Hazeltine Corp Periodic wave generator
US2265216A (en) * 1938-04-23 1941-12-09 Hartford Nat Bank & Trust Co Multiplex telephony system
US2265848A (en) * 1940-07-27 1941-12-09 Hazeltine Corp Synchronizing-signal generator
US2287296A (en) * 1938-04-09 1942-06-23 United Incandescent Lamp & Ele Disturbance supperssion in radio receivers
US2324851A (en) * 1941-03-31 1943-07-20 Rca Corp Cathode ray measuring device
US2365476A (en) * 1943-05-11 1944-12-19 Du Mont Allen B Lab Inc Electronic switch and rectangular wave generator
US2412485A (en) * 1942-02-17 1946-12-10 Cossor Ltd A C Saw-tooth voltage generator
US2438927A (en) * 1942-08-24 1948-04-06 Standard Telephones Cables Ltd Modulation means and method
US2489302A (en) * 1944-05-26 1949-11-29 Int Standard Electric Corp Multichannel time modulated electrical pulse communication system

Patent Citations (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2229700A (en) * 1937-06-09 1941-01-28 Radio Patents Corp Selective space discharge device
US2214019A (en) * 1937-10-30 1940-09-10 Bell Telephone Labor Inc Electronic switching device
US2287296A (en) * 1938-04-09 1942-06-23 United Incandescent Lamp & Ele Disturbance supperssion in radio receivers
US2265216A (en) * 1938-04-23 1941-12-09 Hartford Nat Bank & Trust Co Multiplex telephony system
US2242934A (en) * 1938-11-04 1941-05-20 Hazeltine Corp Periodic wave generator
US2224677A (en) * 1939-03-23 1940-12-10 Bell Telephone Labor Inc Signaling system
US2223001A (en) * 1939-04-24 1940-11-26 Farnsworth Television & Radio High efficiency amplifier
US2265848A (en) * 1940-07-27 1941-12-09 Hazeltine Corp Synchronizing-signal generator
US2324851A (en) * 1941-03-31 1943-07-20 Rca Corp Cathode ray measuring device
US2412485A (en) * 1942-02-17 1946-12-10 Cossor Ltd A C Saw-tooth voltage generator
US2438927A (en) * 1942-08-24 1948-04-06 Standard Telephones Cables Ltd Modulation means and method
US2365476A (en) * 1943-05-11 1944-12-19 Du Mont Allen B Lab Inc Electronic switch and rectangular wave generator
US2489302A (en) * 1944-05-26 1949-11-29 Int Standard Electric Corp Multichannel time modulated electrical pulse communication system

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2659837A (en) * 1949-03-29 1953-11-17 Gen Electric Sweep linearity control circuit
US2823274A (en) * 1954-08-04 1958-02-11 Du Mont Allen B Lab Inc Adjustable sweep circuit

Also Published As

Publication number Publication date
BE474954A (en, 2012) 1948-01-31
FR950154A (fr) 1949-09-20
ES178879A1 (es) 1947-09-16

Similar Documents

Publication Publication Date Title
US2172354A (en) Multiplex signaling system
US2462896A (en) Line finder synchronizer
US2462111A (en) Multichannel pulse distributor system
GB601931A (en) Multi-channel communication system
US2489883A (en) Pulse code modulation receiver employing cathode-ray tube demodulators
US2641698A (en) Delay line decoder
US2512676A (en) Electronic switching
US2667599A (en) Electronic switching device
US2556179A (en) Multiple pulse producing system
US2516886A (en) Cathode-ray tube modulator
DE938554C (de) Mehrkanalnachrichtenanlage fuer die UEbertragung zeitmodulierter Signalimpulse
US2495738A (en) Cathode-ray pulse time modulation multiplex system
US2427500A (en) Cathode-ray tube modulator in a pulse multiplex transmitter
US2816163A (en) Synchronizing system for signal receivers
US2474810A (en) Multichannel cyclophon
US2491969A (en) Electric signal transmission system
US2492344A (en) Line finder control circuit for communication systems
US2454773A (en) Pulse multiplex transmitter employing a cathode-ray tube time modulator
US2517579A (en) Multichannel pulse receiving system
US2848647A (en) Multiplexing system
US2524789A (en) Multichannel time modulated pulse receiving system
US2576093A (en) Cathode-ray tube circuit
US2740837A (en) Semiconductor signal translating devices
US2876350A (en) Coding system
GB699889A (en) Improvements in gating arrangements for pulse amplitude modulation time division multiplex signalling systems