US2170252A - Transformation of relaxation oscillations - Google Patents
Transformation of relaxation oscillations Download PDFInfo
- Publication number
- US2170252A US2170252A US152949A US15294937A US2170252A US 2170252 A US2170252 A US 2170252A US 152949 A US152949 A US 152949A US 15294937 A US15294937 A US 15294937A US 2170252 A US2170252 A US 2170252A
- Authority
- US
- United States
- Prior art keywords
- resistance
- amplifier
- transformer
- condenser
- potential
- 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
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Classifications
-
- 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
- transformers for coupling purposes between an amplifying tube, the grid of which is excited by relaxation oscillations, and the defiecting plates of a cathode ray tube has already formed subject matter of the earlier applications of the applicant Serial Nos. 106,021 (now Patent 2,147,559) and 131,689.
- the width of its frequency band must have a range which is governed by the number of relaxation oscillations per second as lower limit and by the desired duration of the return as upper limit.
- a transformer of this nature is only capable of providing a linear deflection if the same constitutes substantially no load on the connected amplifying tube. This condition is only capable of being fulfilled by tubes having a small inner resistance, i. e. by three-pole tubes,
- connection systems 30 are set forth by means of which it is possible to correct the deflecting potential, i. e. to make the same linear.
- Figs. 1 to 4 show an arrangement according to the invention, consisting of 35 relaxation generator followed by an amplifier and a step-up transformer and different means for effecting rectilinear deflecting potential.
- Fig. 1 shows these means comprising a variable anode resistance of the amplifier
- Fig. 2 shows these means comprising an integration circuit consisting of a parallel connection of a condenser and a resistance in series to said anode resistance,
- Fig.3 shows these means comprising the said 45 integration circuit according to the Fig. 2 cmployed at the same time for steadying the anode potential of said amplifier
- Fig. 4 shows these means comprising a variable resistance in series to the primary winding of said step-up transformer
- Fig. 5 shows a suitable arrangement of the said transformer.
- Fig. 1 there is shown an operating tube I, with the grid of which there is connected 2.
- condenser 3 which is charged in linear fashion by way of the resistance 2 and is discharged in the known fashion upon each image change by means of a discharge tube 4.
- condenser 3 which is charged in linear fashion by way of the resistance 2 and is discharged in the known fashion upon each image change by means of a discharge tube 4.
- the condition that the transformer is practically no load for the tube is fulfilled by a regulable July 16, 1936 anode resistance 5, which is traversed by the anode current from the battery l3, Whilst the primary winding la of the transformer is blocked against direct current by means of a condenser 8.
- the coils of the secondary winding lb are connected to the deflecting plates 13a, 13b of the cathode ray tube, its middle point to the anode 12.
- the condition may be fulfilled that the inner resistance of the generator, i. e., the parallel connection of tube I and resistance 5, be smaller than the input resistance of the transformer.
- the inner resistance of the generator i. e., the parallel connection of tube I and resistance 5
- Ser. No. 106,021 that a remedy against this is possible by integrating the linear relaxation potential and by furnishing the transformer with a superposition of the integrated and the linear relaxation potential.
- the integration is performed in principle by condenser charging. In the case of the last mentioned application this charging is performed in the grid circuit. There then occurs the difiiculty, however, that the two condensers cannot be discharged simultaneously by one discharge tube, and there occurs a slowing down of the return curve.
- the integration is performed according to Fig. 2 in the anode circuit of the tube I.
- a circuit consisting of a condenser. shunted by a resistance 6 is connected in series to the anode resistance 5.
- An integral correction may also be adjusted in accordance with the invention by a stronger If the relaxation curve is. integrated according to it, there results a parabola in proportion to 15 This corresponds to a tube characteristic with an increasing steepness. As well known, this may be adjusted by adjusting the amplifying tube in the lower bend.
- the operating tube is in all cases a three-pole tube having an internal resistance as small as possible. In the above example it had an internal resistance of a few thousand ohms.
- the screening grid is connected with the anode, whereby there is obtained the effect of a three-pole tube.
- the transformer I carries no d.-c. current it mayhave an iron core without air gap and consequently a high input impedance.
- still another condition has to be fulfilled at least by the horizontal (line) deflection transformer.
- Its frequency, corre sponding to a ZOO-line or 400-line image amounts to 5,000 or 10,000 periods.
- a rap-id return movement during approximately of this line period accordingly requires of the transformerthe transmission of a frequency of a twenty times higher periodicity with full amplitude. Since on the other hand a large impedance and accordingly the use of an iron core is absolutely essential,
- this high frequency can be managed only when the secondary of the transformer has a very small inner capacity.
- An arrangement for producing the deflecting voltage of saw-tooth wave form for deflecting the cathode ray in cathode ray tubes for television and the like comprising a relaxation generator, an amplifiena transformer having a primary winding being connected via a condenser to the output of said amplifier, and a secondary wind:- ing being connected with the deflecting elements of said cathode ray tube, the input of said amplifier being connected with the saidgenerator, means for integrating the potential occurring at the output of said amplifier, means for superimposing the said integrated potential on the output potential of the amplifier.
- An arrangement forproducing the deflecting voltage of saw-tooth wave form for deflecting the cathode ray in cathode ray tubes for television and the like comprising a relaxation generator, an amplifier, a transformer having a primary winding being connected via a condenser to the output of said amplifier, and a secondary winding being connected with the deflecting elements of said cathode ray tube, the input of said amplifier being connected with the said generator,
- An arrangement for producing the deflecting voltage of saw-tooth wave form for deflecting the cathode ray in cathode ray tubes for television and thelike comprisingarelaxation generator, an amplifier, a transformer having'a primary Winding being connected via a condenser A to the output of said amplifier, and a secondary winding being connected with the deflecting elements of said cathode ray tube, the input of said amplifier being connected with the said generator, means for integrating the potential occurring at the output of said amplifier, means for superimposing the said integrated potential on the output potential of the amplifier, the anode resistance of said amplifier being small as compared with the impedance of said primary wind- 4 amplifier being connected with the said generator, an integrating circuit consisting of a condenser shunted by a resistance connected in series to the anode resistance of the said amplifier for integrating the potential occurring at the output of said amplifier.
- An arrangement for producing the deflect- 7 ing voltage of saw-tooth wave form for deflecting the cathode ray in cathode ray tubes for television and the like comprising a relaxation generator, an amplifier, a transformer having a primary winding being connected via a condenser to the output of said amplifier, and a secondary winding being connected with the deflecting elements of said cathode ray tube, the input of said amplifier being connected with the said generator, an integrating circuit consisting of a condenser and a resistance, the last mentioned condenser and said resistance being simultaneously used for filtering the anode direct current of the said amplifier and for integrating the potential occurring at the output of said amplifier.
- An arrangement for producing the deflecting voltage of saw-tooth wave form for deflecting the cathode ray in cathode ray tubes for television and the like comprising a relaxation generator, an amplifier, a transformer having a primary winding being connected via a condenser to the output of said amplifier, and a secondary winding being connected with the deflecting elements of said cathode ray tube, the input of said amplifier beingconnected with the said generator, an integrating circuit consisting of a condenser shunted by a resistance connected in series to the anode resistance of the said amplifier for integrating the potential occurring at the output of said amplifier, an ohmic variable resistance connected in series to the said primary winding.
Landscapes
- Oscillators With Electromechanical Resonators (AREA)
- Inductance-Capacitance Distribution Constants And Capacitance-Resistance Oscillators (AREA)
- Details Of Television Scanning (AREA)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE498687X | 1936-07-16 |
Publications (1)
Publication Number | Publication Date |
---|---|
US2170252A true US2170252A (en) | 1939-08-22 |
Family
ID=6545333
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US152949A Expired - Lifetime US2170252A (en) | 1936-07-16 | 1937-07-10 | Transformation of relaxation oscillations |
Country Status (4)
Country | Link |
---|---|
US (1) | US2170252A (xx) |
BE (1) | BE422643A (xx) |
FR (1) | FR48645E (xx) |
GB (1) | GB498687A (xx) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2531830A (en) * | 1944-08-16 | 1950-11-28 | Albert R Simpson | Voltage pulse generator |
-
0
- BE BE422643D patent/BE422643A/xx unknown
-
1937
- 1937-07-10 US US152949A patent/US2170252A/en not_active Expired - Lifetime
- 1937-07-15 GB GB19628/37A patent/GB498687A/en not_active Expired
- 1937-07-16 FR FR48645D patent/FR48645E/fr not_active Expired
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2531830A (en) * | 1944-08-16 | 1950-11-28 | Albert R Simpson | Voltage pulse generator |
Also Published As
Publication number | Publication date |
---|---|
GB498687A (en) | 1939-01-12 |
FR48645E (fr) | 1938-04-19 |
BE422643A (xx) |
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