US2126243A - Sweep circuits - Google Patents

Sweep circuits Download PDF

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Publication number
US2126243A
US2126243A US77646A US7764636A US2126243A US 2126243 A US2126243 A US 2126243A US 77646 A US77646 A US 77646A US 7764636 A US7764636 A US 7764636A US 2126243 A US2126243 A US 2126243A
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US
United States
Prior art keywords
condenser
voltage
resistance
circuit
source
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
US77646A
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English (en)
Inventor
Busse Ernst
Mark Jan Van Der
Venis Adolph
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.)
Koninklijke Philips NV
Original Assignee
Philips Gloeilampenfabrieken NV
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Application filed by Philips Gloeilampenfabrieken NV filed Critical Philips Gloeilampenfabrieken NV
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Publication of US2126243A publication Critical patent/US2126243A/en
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Expired - Lifetime legal-status Critical Current

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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
    • H03K4/12—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 voltage is produced across a capacitor
    • H03K4/24—Boot-strap generators
    • 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
    • H03K4/88—Generating pulses having essentially a finite slope or stepped portions having triangular shape having sawtooth shape using as active elements electrochemical cells or galvano-magnetic or photo-electric elements
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03K—PULSE TECHNIQUE
    • H03K6/00—Manipulating pulses having a finite slope and not covered by one of the other main groups of this subclass
    • H03K6/02—Amplifying pulses

Definitions

  • the invention relates to a device intended to generate a voltage which increases linearly with the time and comprising a condenser, a source of direct voltage anda resistance through which 5 the condenser is charged.
  • the known controlling devices for generating a sawit tooth current or voltage comprise a condenser
  • FIG. 1 illustrates diagrammatically a simplified circuit diagram for aiding in the explanation of our in-' vention 25
  • Fig. 2 shows diagrammatically a circuit em- .bodying our invention.
  • FIGs. 3 and 4 show schematically modifications of tlz e embodiment of our invention shown in Fig. a
  • Such a known device for generating a sawtooth current or voltage is represented in Figure l oflthe accompanying drawing in which I denotes a source of voltage, 2 a condenser. 3 a discharge 35 tube-and4- a resistance through which the condenser 2 is charged.
  • the condenser 2 is charged by thesource of v 40 voltage I through a resistance 4 with a rapidity which isdetermined by the values of the resist ance B and of the condenser 2, until the ignition voltage of the discharge tube 3 which may containa control electrode is attained or until, as is The instantaneous value of the voltage set up across the condenser 2 increases during the charging period linearly with the time it the charging current oi the condenser 2 is constant.
  • pedance formed by a saturated diode or by a screen grid tube.
  • the object of the invention is to provide a device for generating a voltage which increases linearly with the time and to obviate the above mentioned disadvantages. This is obtained in the circuit-arrangement according to the invention owing to the iactfth'at in the charging circuit operates an emf. derived from the condenser voltage and being equal and oppositely directed to the condenser voltage.
  • the emf. derived from the condenser is taken from the anode circuit of the last tube of an even number of cascade-connected discharge tubes to which the voltage set up across the condenser is applied.
  • the emf. derived from the condenser may likewise be taken from the anode circuit of the last'oi an odd number of cascade-connected discharge tubes it an odd number of these tubes are formed by a ,multi-grid tube whose electrode voltages are'adiusted in such manner that in the anode circuit of the multi-grid tube is set up avoltage which 'is in phase with the voltage supplied to the grid.
  • Figure 2 represents a circuit-arrangement for voltage required for 5 scanning purposes in television systems, comprising a condenser '2; a source I of direct volt age and a resistance 4 through which the condenser 2 is charged by the source -I of direct voltage.
  • the condenser discharges periodically through a charge tube '3, periodical impulses being supp ed to the grid of said tube to control
  • the voltage set up across the condenser 2 is'supplied through a condenser E to a discharge tube 8 between the i the anode circuit of the tube 6 is applied via' voltage set up across the condenser 2 increases linearly with the time, the voltage produced in grid condenser 1 and a leakage resistance In to the grid of a tube I I in the anode circuit of which is located a resistance ii a point I! of which is connected to that end of the resistance 4 which is remote from the condenser 2. with the aboveincreases linearly with the described circuit-arrangement that portion of the resistance I!
  • the source of voltage I which is located between the point II and the positive terminal.
  • the source of voltage I which acts at the same time as the source of anode voltage for the tubes 6 and II) the resistance 4 and the condenser 2.
  • the point I! is so chosen that the voltage set up across said portion of the resistance I2 is equal to the voltage produced across the condenser 2.
  • the direction of the voltage set up across said portion of the resistance 12 in the charging circult is opposite to the condenser voltage.
  • Another measure which may be utilized in accordance with the invention in order to compensate the deflection produced by the resistance I consists in connecting a point located between the ends of the grid leakage resistance I to a point which has relative to the cathode a voltage which is equal to and in phase with the voltage set up'between the grid and the cathode of the tube 6.
  • the current flowing through the resistance I remains zero at every moment and can consequently no longer act on the char ing current of the condenser 2.
  • the condenser 5 may be taken much smaller without any influence being exerted on the shape of the curve representing the instantaneous value of the voltage as a function of the-time.
  • the voltage to be supplied to the point located between the ends of the leakage resistance I may be taken from the anode circuit of one of the discharge tubes in the circuitarrangement.
  • FIG. 3 One mode of realization of a device for generating a saw-tooth voltage in which the above mentioned measure has been carried out is represented in Figure 3 in which between a point I4 of the resistance I and the cathode of the tube 6 is applied a voltage which is equal to and in phase with the voltage set up between the grid and the cathode of the tube 4, owing to the fact that the point I4 is connected through a blocking condenser II to that end of the resistance 4 which is connected to the anode circuit of the tube ii.
  • the circuit-arrangement is completely similar to the circuit-arrangement of Figure 2.
  • An advantage of the last-mentioned measure of compensating for the influence of the grid leakage resistance I relatively to the first-mentioned .measure is that it is independent of the value of impulses 'whic'h'cause the condenser 2 to discharge.
  • the saw -tooth voltage set up across the condenser 2 is suppliedinknown manner to the tubes 6 and II connected in cascade.
  • the grid of the tubes is connected to sucha point'oi the output circuit of the tube 6 that the saw-tooth control the beam of cathode rays.
  • the deflecting plates instead of being convoltage of the grid of'the tube 5 relative to the cathode with the result that in the output circuits of the tubes 6 and ii across the resistances 8 and voltages are set-up which are equal to and in counterphase with each other.
  • Each of the ends a of the resistances 8 and" I2 which are connected to the anode of the corresponding tube is connected, to cheat the deflecting plates i6 and ii of a cathode ray tube, said plates being destined to If it is denected directly across the resistors 8 and I2 may be connected by condensers inserted in series with the connection between the plates and the resistors and a leakage resistor connected directly across the plates l6 and 11.
  • the voltage in the median plane between .the deflecting plates is constant as is desired with cathode ray tubes in order to prevent distortion of the picture received.
  • an emf. which is equal to and has the opposite direction of the condenser voltage is taken from the anode circuit of the tube ll owing to the fact that a point i3 of the resistance i2 is connected to that end of the resistance 4 which is remote from the condenser 2.
  • the influence of there sistance i in this circuit-arrangement may be suppressed by adjusting the point IS in such manner that the voltage between this point and "the "end of the resistance l2 which is connected to the positive terminal of the source of direct" voltage is equal to the voltage set up across the condenser 2 multiplied by the factor
  • a voltage which is equal to and in phase with the voltage set up between the grid and the cathode of the tube 6 is applied between a point of the grid leakage resistance-i, and the cathode of the tube 6 by connecting the end of the resistance 4 which is remote from the condenser-E through a condenser late a point of the grid leakage resistance 1.
  • A. sweep oscillator comprising a source of voltage, a condenser, a resistance, an impedance,
  • a sweep oscillator comprising a source of 4.
  • a sweep oscillator comprising a source oi voltage, a condenser, a resistance, an impedance, means to connect all of said'eler'nents. in series, whereby energy is stored in the condenser with a consequential rise in potential thereacross, and means to vary the voltage across the impedance in an equal and opposite fashion to the variation of voltage across the condenser.
  • a sweep oscillator comprising a source of voltage, a condenser, a resistance, an impedance, means to connect all of said elements in' series, whereby energy is stored in the condenser, means to supply input energy to thermionic amplifier in accordance with the energy stored in the condenser, and means to impress upon the imped ance energy from the thermionic amplifier.
  • a sweep oscillator comprising a source of v voltage, a condenser, a resistance, an impedance,
  • a sweep oscillator comprising a source of voltage, a condenser, a resistance, an impedance,
  • an input circuit and an output circuit for the cascade connected stages means to supply energy to the input circuit in accordance with the-voltage developed across the condenser, and means to connect the output circuit across the impedance.
  • a sweep oscillator comprising a source of voltage, a condenser, a resistance, an'impedance, means to connect all of said elements in series, whereby energy is stored in the eondenserwith a consequential rise in potential thereacross, an even number of amplifying stages connected in cascade, an input circuit and an output circuit for the cascade connected stages, means to supply energy to the input circuit in accordance with the voltage developed across the condenser,
  • a sweep oscillator comprising a source of voltage, a condenser, a resistance, an impedance,
  • a sweep oscillator comprising a source of means to connect all 01' said elements in series
  • a sweep oscillator comprising a source of voltage, a condenser, a resistance, an impedance, means to connect all of said elements in series, means to vary the potential drop across only the impedance as a function of the stored energy of the condenser, and a discharge tube. connected across the condenser.
  • a sweep oscillator comprising a source of voltage, a condenser, a resistance, an impedance,
  • a sweep oscillator comprising a two stage resistance-capacity coupled thermionic amplifier
  • erating a voltage which increases linearly with respect to time which comprises the steps of pro; dudm a source of voltage, charging the condenser from the source of voltage thereby producing a potential drop across the condenser, amplifying the produced potential drop, deriving a portion of the amplified potential drop, and injecting the derived potential drop in series with the condenser and the source of voltage.
  • a condenser for storing energy
  • the method of generating a voltage which increases linearly with respect to time which comprises the steps of producing-a source of voltage, charging the condenser from the source of voltage thereby producing a potential drop across the condenser, amplifying the produced potential drop, deriving a portion of the amplified potential drop equal to the potential drop across the condenser, and injecting the derived potential drop in series with the condenser and the source of voltage.
  • a condenser for storing energy
  • the method of generating a voltage which increases linearly with respect to time which comprises the steps of producing a source of voltage, charging the condenser from the source of voltage thereby producing a potential drop acrossthe condenser, amplifying the produced potential drop, deriving a portion of the amplified potential drop equal to the potential drop across the condenser, and injecting the derived potential drop in series with the condenser and source of voltage and in opposite polarity to 1 the potential drop across the condenser.
  • a condenser for storing energy
  • the method of generating saw-tooth voltage waves which comprises the steps of producing a source of voltage, charg- I ing the condenserfrom the source of voltage thereby producing a potential drop acrossthe condenser, amplifying the produced potential drop, deriving a portion of the amplified potential drop equal to the potential drop across the condenser, injecting the derived potential drop in series with the condenser'and source of voltage and in opposite polarity to the; potential drop across the condenser, and periodically discharging the condenser.

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • Cell Electrode Carriers And Collectors (AREA)
  • X-Ray Techniques (AREA)
  • Details Of Television Scanning (AREA)
US77646A 1935-04-18 1936-05-02 Sweep circuits Expired - Lifetime US2126243A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL452965X 1935-04-18

Publications (1)

Publication Number Publication Date
US2126243A true US2126243A (en) 1938-08-09

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Application Number Title Priority Date Filing Date
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Country Status (6)

Country Link
US (1) US2126243A (xx)
BE (1) BE414841A (xx)
DE (1) DE1080601B (xx)
FR (2) FR805101A (xx)
GB (1) GB452965A (xx)
NL (1) NL45214C (xx)

Cited By (21)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2418825A (en) * 1943-01-08 1947-04-15 Bell Telephone Labor Inc Relaxation oscillator
US2419606A (en) * 1944-05-13 1947-04-29 Us Sec War Linear saw-tooth generator
US2426179A (en) * 1942-06-19 1947-08-26 Int Standard Electric Corp Electrical relaxation oscillator
US2448069A (en) * 1944-08-30 1948-08-31 Philco Corp Saw-tooth generator with automatic amplitude control
US2448070A (en) * 1944-08-30 1948-08-31 Philco Corp Saw-tooth generator with automatic amplitude control
US2455373A (en) * 1943-03-25 1948-12-07 Sperry Corp Time base sweep and intensifier pulse generator
US2458367A (en) * 1948-01-23 1949-01-04 Motorola Inc Saw-tooth voltage generator
US2473208A (en) * 1944-11-14 1949-06-14 Stromberg Carlson Co Apparatus for linearizing saw-tooth waves
US2513722A (en) * 1948-05-13 1950-07-04 Stromberg Carlson Co Periodic wave generator
US2515632A (en) * 1942-03-21 1950-07-18 Raytheon Mfg Co Condenser charging system
US2521009A (en) * 1943-02-24 1950-09-05 John H Homrighous Television system
US2521762A (en) * 1945-12-19 1950-09-12 Standard Telephones Cables Ltd Saw-tooth oscillator
US2583323A (en) * 1949-03-29 1952-01-22 Rca Corp Vertical linearity in television receivers
US2585093A (en) * 1948-04-28 1952-02-12 Philco Corp Triangular pulse generator
US2594104A (en) * 1943-12-16 1952-04-22 Us Navy Linear sweep circuits
US2715182A (en) * 1945-04-03 1955-08-09 Amasa S Bishop Variable rate sweep voltage generator
US2847565A (en) * 1954-12-31 1958-08-12 Ibm Pulse gap detector
US2854575A (en) * 1953-09-29 1958-09-30 Vickers Electrical Co Ltd Electronic sweep generating circuit with constant magnitude of sweep
US2890330A (en) * 1953-03-23 1959-06-09 Rca Corp Signal amplifying systems
US3031158A (en) * 1942-06-22 1962-04-24 Honeywell Regulator Co Aircraft control apparatus
US4951877A (en) * 1988-06-15 1990-08-28 Interpump - S.P.A. High-versatility device for cleaning surface by means of a liquid jet

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB479113A (en) * 1936-04-29 1938-01-31 Alan Dower Blumlein Improvements in or relating to thermionic valve circuits particularly for use in television
DE949513C (de) * 1937-12-31 1956-09-20 Fernseh Gmbh Anordnung zur Erzeugung von Saegezahnspannungen mittels Aufladekondensator und Ladewiderstand
DE756444C (de) * 1939-05-13 1953-01-19 Aeg Anordnung zum Linearisieren von aus Teilen einer Exponentialkurve bestehenden Kippschwingungen
DE765929C (de) * 1939-11-17 1954-05-03 Siemens & Halske A G Anordnung zur Erzeugung einer zur Zeitaufloesung bei Elektronenstrahl-Oszillographendienenden, mit der Zeit linear ansteigenden Spannung
DE763579C (de) * 1941-07-25 1954-03-15 Georg Seibt Nachf Dr Schaltung zum Erzeugen von Kippspannungen mit saegezahnartigem Verlauf durch Ladung und Entladung eines Kondensators

Cited By (21)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2515632A (en) * 1942-03-21 1950-07-18 Raytheon Mfg Co Condenser charging system
US2426179A (en) * 1942-06-19 1947-08-26 Int Standard Electric Corp Electrical relaxation oscillator
US3031158A (en) * 1942-06-22 1962-04-24 Honeywell Regulator Co Aircraft control apparatus
US2418825A (en) * 1943-01-08 1947-04-15 Bell Telephone Labor Inc Relaxation oscillator
US2521009A (en) * 1943-02-24 1950-09-05 John H Homrighous Television system
US2455373A (en) * 1943-03-25 1948-12-07 Sperry Corp Time base sweep and intensifier pulse generator
US2594104A (en) * 1943-12-16 1952-04-22 Us Navy Linear sweep circuits
US2419606A (en) * 1944-05-13 1947-04-29 Us Sec War Linear saw-tooth generator
US2448070A (en) * 1944-08-30 1948-08-31 Philco Corp Saw-tooth generator with automatic amplitude control
US2448069A (en) * 1944-08-30 1948-08-31 Philco Corp Saw-tooth generator with automatic amplitude control
US2473208A (en) * 1944-11-14 1949-06-14 Stromberg Carlson Co Apparatus for linearizing saw-tooth waves
US2715182A (en) * 1945-04-03 1955-08-09 Amasa S Bishop Variable rate sweep voltage generator
US2521762A (en) * 1945-12-19 1950-09-12 Standard Telephones Cables Ltd Saw-tooth oscillator
US2458367A (en) * 1948-01-23 1949-01-04 Motorola Inc Saw-tooth voltage generator
US2585093A (en) * 1948-04-28 1952-02-12 Philco Corp Triangular pulse generator
US2513722A (en) * 1948-05-13 1950-07-04 Stromberg Carlson Co Periodic wave generator
US2583323A (en) * 1949-03-29 1952-01-22 Rca Corp Vertical linearity in television receivers
US2890330A (en) * 1953-03-23 1959-06-09 Rca Corp Signal amplifying systems
US2854575A (en) * 1953-09-29 1958-09-30 Vickers Electrical Co Ltd Electronic sweep generating circuit with constant magnitude of sweep
US2847565A (en) * 1954-12-31 1958-08-12 Ibm Pulse gap detector
US4951877A (en) * 1988-06-15 1990-08-28 Interpump - S.P.A. High-versatility device for cleaning surface by means of a liquid jet

Also Published As

Publication number Publication date
FR805003A (fr) 1936-11-09
DE1080601B (de) 1960-04-28
GB452965A (en) 1936-09-02
BE414841A (xx)
FR805101A (fr) 1936-11-12
NL45214C (xx)

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