US2147559A - Transformation of relaxation oscillations - Google Patents

Transformation of relaxation oscillations Download PDF

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Publication number
US2147559A
US2147559A US106021A US10602136A US2147559A US 2147559 A US2147559 A US 2147559A US 106021 A US106021 A US 106021A US 10602136 A US10602136 A US 10602136A US 2147559 A US2147559 A US 2147559A
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Prior art keywords
condenser
potential
resistance
relaxation
transformer
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Expired - Lifetime
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US106021A
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English (en)
Inventor
Schlesinger Kurt
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Loewe Opta GmbH
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Loewe Opta GmbH
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    • 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' relaxation oscillation generator supplying the deflecting voltage for a cathode ray tube.
  • An object of the invention is the use of a transformer coupling between relaxation oscillation generator and the deflecting systems of the cathode ray tube.
  • a transformer coupling in view of the low deflecting power of the Braun tube is able to effect a considerable increase in the deflecting potential.
  • the internal resistance between the deflecting plates of a cathode ray tube may amount to approximately 10 ohms and the deflecting power in respect of several hundred volts deflecting potential only amounts to a few tenths of a watt. If, therefore, approximately 10 Watts are employed on the primary side, a
  • the present invention deals with the question of a form of relaxation oscillation which is devoid of error. It is not a readily possible matter to transmit a relaxation oscillation true to form by way of a transformer.
  • Fig. 1 shows a conventional circuit arrangement for coupling a relaxation oscillator amplifier to an inductive load.
  • Figs. 2 and 3 show" arrangements for performing the invention.
  • the end stage I is connected at the grid with a relaxation oscillation generator 2. It possesses an internal resistance 3 (Bl).
  • the transformer 4 possesses an impedance composed of ohmic resistance 5 and inductive reactance 6. If it were possible to apply to the primary terminal of the transformer .an undistorted relaxation potential of the form of curve of the generator 2, a transformation true to form would'be capable'of being performed.
  • the secondary potential would have the value e,-Ma (1) and the current would have a form of curve differing greatly to the relaxation curve.
  • the integral curve of the primary potential would be operation of the amplifier. It is only to be obtained when the apparent resistance of the transformer is very large as compared with the internal resistance of the tube.
  • the subject matter of the inventon is a circuit which supplies appreciable relaxation oscillations even in the case of small current-excited transformers.
  • this circuit the potential excitation of the relaxation apparatus itself is distorted in the manner according to the invention (see below), whereby the transformer distortion is compensated.
  • the power amplifier I in accordance with the invention, is already excited in a distorted relaxation curve.
  • the terminal potential of the transformer then consists of a purely ohmic and an inductive component.
  • the anode of the amplifying tube I a potential according to the following Equation (3)
  • the secondary popose of being able to derive a clean relaxation curve from the secondary of the transformer.
  • the Formula (4) supplies the condition for the form of curve of the grid alternating potential with which the amplifier requires to be excited. It Will be seen that this grid alternating potential may not have a pure relaxation curve form. It is not sufiicient to add the expression B't. This would merely suffice for no-load operation.
  • the short-circuit value A-f must also be included, and it must be added in a ratio to the undistorted grid potential which is determined by the circuit.
  • the short-circuit value, according to Equation (i) is the integral of the relaxation oscillation.
  • the grid excitation of the power amplifier I is composed of an undistorted relaxation potential curve and a superposed integral of this relaxation potential curve.
  • Fig. 2 shows a circuit which enables the Equation (4) to be fulfilled in practice.
  • the second integration of the relaxation curve is effected in this circuit by charging a condenser.
  • the pushpull operation ensures constant sharpness of the image point at the edge of the image. It may also be of advantage to make the insulation between the primary winding 4a and the secondary winding 41) of the transformer 4 proof against high tension.
  • the inner core of the transformer should be so dimensioned that saturation by the emissive current of 1 is avoided. It is naturally also possible by employing two power amplifier stages I already to perform push-pull operation on theprimary side and in this way to avoid saturation of the transformer iron core.
  • the discharge of the condensers 9 and H may be effected by means of a discharge tube I2, which in the condition of charge is blocked by negative bias I4 and is 'made conductive by the synchronisation impulses.
  • a discharge tube I2 and I2a for each of the two condensers 9 and II, the grid of which may be connected in parallel.
  • a bridging condenser I5 may be useful, which is so small that it does not aifect the charging operation but upon the discharge causes a more rapid discharge of the condenser II and accordingly an improvement in the return speed.
  • I5 might amount to approximately 0.01m.
  • Fig. 3 there is shown a circuit diagram of this kind, in which the charging circuit comprising resistance 8 and condenser 9 is separated from the integral circuit comprising resistance I0 and condenser II by a tube l5.
  • the tube I5 receives its anode potential by way of a potential resistance I6, which is small in relation to the resistance I0.
  • a potentiometer Ifla a mixing of the potential of the two condensers may be performed in desired ratio with the aid of a sliding contact I2, and this mixture in accordance with Equation (4) passed to the end tube I and the transformer 4.
  • Numerous other circuits are also possible, which make use of the method of integration of the undistorted relaxation curve according to the invention.
  • An arrangement for producing deflecting voltages of saw-tooth 'wave form for deflecting the cathode ray in a cathode ray tube comprising a relaxation'oscillation generator having input and output terminals, a transformer having a primary and a secondary winding, means for integrating the potential occurring at said output terminals, means for superimposing said integrated potential on said output potential and means for applying said superimposed potentials to said primary winding, said secondary Winding being connected to the deflecting system of said cathode ray tube.
  • An arrangement for producing deflecting voltages of saw-tooth wave form for deflecting the cathode ray in a cathode ray tube comprising a relaxation oscillation generator having input and output terminals, an electronic amplifier, a transformer having a primary and a secondary winding, means for integrating the potential occurring at said output terminals, means for superimposing said integrated potential on said output potential and means for applying said superimposed potentials to the input of said electronic amplifier, the output of said electronic amplifier being connected to said primary Winding, said secondary winding being connected to the deflecting system of saidcathode ray tube.
  • An arrangement for producing deflecting voltages of saw-tooth wave form for deflecting the cathode ray in a cathode ray tube comprising a relaxation oscillation generator having input and output terminals, an electronic amplifier, a transformer having a primary and a secondary winding, a resistance and a condenser, the potential occurring at said output terminals being supplied through said resistance to said condenser, means for superimposing the potential formed on said condenser on said output potential and means for applying said superimposed potentials to the input of said electronic amplifier, the output of said electronic amplifier being connected to said primary winding, said secondary winding being connected to the deflecting system of said cathode ray tube.
  • An arrangement for producing deflecting voltages of saw-tooth wave form for deflecting the cathode ray in a cathode ray tube comprising a relaxation oscillation generator having input and output terminals, an electronic amplifier, a transformer having a primary and a secondary winding, a potentiometer resistance, a tapping point on said potentiometer resistance and a condenser, the potential occurring at said output terminals being applied through said potentiometer resistance to said condenser, the tapping point of said potentiometer resistance being connected to the input circuit of said electronic amplifier, the output of said electronic amplifier being connected to said primary winding, said secondary winding being connected to the deflecting system of said cathode ray tube.
  • An arrangement for producing deflecting voltages of saw-tooth wave form for deflecting the cathode ray in a cathode ray tube comprising a relaxation oscillation generator including a charging condenser and a grid-controlled high vacuum discharge tube, an electronic amplifier, a transformer having a primary and a secondary winding, a potentiometer resistance, a tapping point on said potentiometer resistance, a second condenser and a second grid controlled high vacuum discharge tube for discharging said second condenser, the potential occurring at the terminals of said first charging condenser being applied through said potentiometer resistance to said second condenser, the tapping point of said potentiometer resistance being connected to the input circuit of said electronic amplifier, the output of said electronic amplifier being connected to said primary winding, said secondary Winding being connected to the deflecting system of said cathode ray tube.
  • a relaxation oscillation generator including a charging condenser and a grid-controlled high vacuum discharge tube, an electronic amplifier, a transformer having
  • An arrangement for producing deflecting voltages of saw-tooth wave form for deflecting the cathode ray in a cathode ray tube comprising a relaxation oscillation generator including a charging condenser and a grid controlled gasfilled discharge tube, an electronic amplifier, a transformer having a primary and a secondary Winding, a potentiometer resistance, a tapping point on said potentiometer resistance, a.
  • An arrangement for producing deflecting voltages of saw-tooth wave form for deflecting the cathode ray in a cathode ray tube comprising a relaxation oscillation generator including a charging condenser and a grid-controlled high vacuum discharge tube, an electronic amplifier, a transformer having a primary and a secondary winding, a potentiometer resistance, a tapping point on said potentiometer resistance, a second condenser and means for discharging said second condenser through said discharge tube of said first condenser, the potential occurring at the terminals of said first charging condenser being applied through said potentiometer resistance to said second condenser, the tapping point of said potentiometer resistance being connected to the input circuit of said electronic amplifier, the output of said electronic amplifier being connected to said primary winding, said secondary winding being connected to the deflecting system of said cathode ray tube.
  • a relaxation oscillation generator including a charging condenser and a grid-controlled high vacuum discharge tube, an electronic amplifier,
  • An arrangement for producing deflecting voltages of saw-tooth wave form for deflecting the cathode ray in a cathode ray tube comprising a relaxation oscillation generator including a charging condenser and a grid controlled gasfilled discharge tube, an electronic amplifier, a transformer having a primary and a secondary winding, a potentiometer resistance, a tapping point on said potentiometer resistance, a second condenser and means for discharging said second condenser through said discharge tube of said first condenser, the potential occurring at the terminals of said first charging condenser being applied through said potentiometer resistance to said second condenser, the tapping point of said potentiometer resistance being connected to the input circuit of said electronic amplifier, the output of said electronic amplifier being connected to said primary Winding, said secondary Winding being connected to the deflecting system of said cathode ray tube.
  • a relaxation oscillation generator including a charging condenser and a grid controlled gasfilled discharge tube, an electronic amplifier, a transformer

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  • Generation Of Surge Voltage And Current (AREA)
  • X-Ray Techniques (AREA)
  • Stabilization Of Oscillater, Synchronisation, Frequency Synthesizers (AREA)
US106021A 1935-10-25 1936-10-16 Transformation of relaxation oscillations Expired - Lifetime US2147559A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DER94558D DE740131C (de) 1935-10-25 1935-10-25 Anordnung zur Erzeugung von Ablenkspannungen fuer die Ablenkung des Kathodenstrahls in Braunschen Roehren unter Verwendung eines Kippgenerators

Publications (1)

Publication Number Publication Date
US2147559A true US2147559A (en) 1939-02-14

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US106021A Expired - Lifetime US2147559A (en) 1935-10-25 1936-10-16 Transformation of relaxation oscillations

Country Status (6)

Country Link
US (1) US2147559A (me)
BE (1) BE418067A (me)
DE (1) DE740131C (me)
FR (1) FR812496A (me)
GB (1) GB483667A (me)
NL (1) NL48965C (me)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2476978A (en) * 1944-02-03 1949-07-26 Int Standard Electric Corp Time base circuit for cathode-ray tubes
US2535810A (en) * 1947-08-26 1950-12-26 Bell Telephone Labor Inc Minimizing electron optical distortions in electron camera tubes
US2594513A (en) * 1950-11-20 1952-04-29 Rca Corp Linearity control sweep circuits
US2609507A (en) * 1949-05-11 1952-09-02 Motorola Inc Vertical deflection system
US2687493A (en) * 1950-11-30 1954-08-24 Rca Corp Dynamic electron beam control system
US2816247A (en) * 1954-03-27 1957-12-10 Philips Corp Circuit arrangement for producing a sawtooth-shaped current in a vertical deflector coil

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1923252A (en) * 1933-08-22 Phasing device
DE387381C (de) * 1921-03-05 1923-12-27 K W Wagner Dr Ing Dr Anordnung zur Erhoehung der Telegraphiergeschwindigkeit auf langen Leitungen
DE382177C (de) * 1921-06-07 1923-09-29 Robert Targon Verfahren zur Beseitigung unerwuenschter Kurvenverzerrungen (Oberwellen) oder zur Erzielung gewuenschter Kurvenverzerrungen in der Hochfrequenztechnik
DE495577C (de) * 1926-12-18 1930-04-09 Richard Ambronn Dr Verfahren zur seismischen Bodenforschung
US2137039A (en) * 1931-06-17 1938-11-15 Rca Corp Method and apparatus for communication by television
BE390958A (me) * 1931-09-26
BE408513A (me) * 1934-03-19

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2476978A (en) * 1944-02-03 1949-07-26 Int Standard Electric Corp Time base circuit for cathode-ray tubes
US2535810A (en) * 1947-08-26 1950-12-26 Bell Telephone Labor Inc Minimizing electron optical distortions in electron camera tubes
US2609507A (en) * 1949-05-11 1952-09-02 Motorola Inc Vertical deflection system
US2594513A (en) * 1950-11-20 1952-04-29 Rca Corp Linearity control sweep circuits
US2687493A (en) * 1950-11-30 1954-08-24 Rca Corp Dynamic electron beam control system
US2816247A (en) * 1954-03-27 1957-12-10 Philips Corp Circuit arrangement for producing a sawtooth-shaped current in a vertical deflector coil

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Publication number Publication date
BE418067A (me)
DE740131C (de) 1943-10-13
NL48965C (me) 1940-03-15
GB483667A (en) 1938-04-25
FR812496A (fr) 1937-05-11

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