US2225469A - Relaxation arrangement for deflecting cathode rays - Google Patents
Relaxation arrangement for deflecting cathode rays Download PDFInfo
- Publication number
- US2225469A US2225469A US233764A US23376438A US2225469A US 2225469 A US2225469 A US 2225469A US 233764 A US233764 A US 233764A US 23376438 A US23376438 A US 23376438A US 2225469 A US2225469 A US 2225469A
- Authority
- US
- United States
- Prior art keywords
- tube
- condenser
- cathode
- relaxation
- condensers
- 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
- 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
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03F—AMPLIFIERS
- H03F3/00—Amplifiers with only discharge tubes or only semiconductor devices as amplifying elements
- H03F3/26—Push-pull amplifiers; Phase-splitters therefor
- H03F3/28—Push-pull amplifiers; Phase-splitters therefor with tubes only
-
- 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
- H03K4/26—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 current is produced through an inductor
- H03K4/39—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 current is produced through an inductor using a tube operating as an amplifier
- H03K4/43—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 current is produced through an inductor using a tube operating as an amplifier combined with means for generating the driving pulses
-
- 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
- symmetric deecting voltages or deflecting currents in order to avoid the cathode ray when deflected causing distortions of the spot of light.
- symmetric relaxation voltages of this kind mainly two methods are available. One of these consists in producing a normal, that is, an asymmetric relaxation voltage by means of a customary generator and to amplify such voltage by a push-pull connected arrangement, the counterphasal input voltage intended for the push-pull tube located at the output end of the relaxation generator being in well known manner taken from the anode circuit of the other or symmetric tube.
- the second method consists in producing the relaxation Voltage directly with the aid of relaxation generators fed in counterphasal fashion and whose symmetry point is connected to earth.
- These arrangements have two condensers which are charged over resistances or charging tubes and in most cases are discharged through an electron tube common to them. To one of these condensers positive charging voltage is supplied While the charging voltage supplied to the other condenser is negative.
- the discharge tube common to the two condensers may be periodically opened by synchronizing impulses.
- the relaxation voltages generated by the relaxation condensers are not sufcient in television tubes to deflect the cathode ray suiliciently. These deecting voltages therefore require to be amplied, and they are so by a push-pull connected arrangement.
- Fig. 1 is a wiring diagram of a known arrangement while Fig. 2 is a wiring diagram of one embodiment of the invention.
- Fig. l I, 2 denote the charging resistances, while 3, 4 indicate charging condensers.
- Condenser 3 is arranged to be charged positively whereas condenser 4 will be charged negatively, as will be seen from the drawing, and both condensers are conjointly discharged through an electron tube 5, this tube being periodically rendered vpermeable to currents in a manner that need not be explained here more fully.
- the ampliiier tubes 6, 1 are connected in (Cl. Z50-36) push-pull after'these condensers.
- the input end of the tube arrangement E, 'I is through condensers 8, 9 and grid leak resistances Il), II joined to the relaxation condensers 3, 4. It will be seen that the usual push-pull connected amplifying f arrangement having a symmetric input end is employed here.
- the invention proposes to couple the tubes S, l' galvanically to the condensers 3, In this way only the gridcathode path of the tubes li, 'l will be connected in parallel with these condensers.
- This path if the tubes are working in the negative region takes no current and the capacity thereof is not detrimental since it may be implied in the capacity of the relaxation condensers.
- This feature of the invention is not so self-evident as it may appear at the rst glance, for to carry this feature into eiiect involves diiiiculties not at once appreciable.
- the main dimculty lies in the fact that in consequence of the coupling condenser 8, Fig.
- This feature is likewise not self-evident because it entails another disadvantage, which consists in this that the operative part of the characteristie curve of tube 6 is flattened by the insertion oi resistance 2l! so that this tube will no longerl be able to eiect the same amplication as tube l.
- This disadvantage is in accordance with a third feature of the invention overcome by supplying to tube E a higher input voltage than is supplied to tube 'l'.
- Such higher input voltage may be obtained by diminishing the capacity of condenser 3 or less suitably by diminishing the appertaining charging resistance I or finally by increasing the appertaining feeding voltage. It is of course possible also to employ several such means in conjunction. Taking all in all, the circuit arrangement as a whole becomes asymmetrical, such asymmetry however resulting in attaining the aim, that is, producing a symmetric deflecting voltage or symmetric deilecting currents.
- the discharge current side of condenser 3 is merely the anode current of tube 5 since the ungrounded side of this condenser is connected solely to the anode and not to the' screen. In this way an extremely rapid discharge of the negatively charged larger condenser 4 is attained. As is well known, such rapid discharge is necessary for the cathode ray to return as quickly as possible.
- Fig. 2 at the rst glance merely differs from Fig. 1 by the mode in which the tubes 6, 'I are coupled to the relaxation condensers 3, 4.
- resistance 20 is considerably greater than resistance 2l in order to raise the cathode potential of tube 6, as stated before.
- are preferably Variable in order to afford a convenient possibility of regulating the amplitude of the deecting voltage or de- Afleeting currents.
- a relaxation arrangement for supplying symmetric deecting Waves whose instantaneous potentials are substantially equal but of opposite sign with respect to a given reference level of potential comprising a rst condenser and means for supplying thereto positive voltage with respect to said reference level of potential, a second condenser and means for supplying thereto negative voltage with respect to said reference level of potential, a first electron tube having a cathode, an anode and a grid, a galvanic connection between said grid and the positive terminal of said first condenser, a second electron tube having a cathode, an anode and a grid, a galvanic connection between said grid of said second tube and the negative terminal of said second condenser, connecting means connecting said two tubes in push-pull to constitute an amplifier, means for biasing the cathode of said second tube to a potential above that of said grid of said second tube, and means for biasing the cathode of said first tube to a potential substantially higher than said bias potential first mentioned
- a relaxation arrangement for supplying symmetric deiiecting waves whose instantaneous potentials are substantially equal but of opposite sign with respect to a given reference level of potential comprising a first condenser andmeans for supplying thereto positive Voltage with respect to said reference level of potential, a second condenser and means for supplying thereto negative voltage with respect to said reference level of potential, a first electron tube having a cathode, an anode and a grid, a galvanic connection between said grid and the positive terminal of said iirst condenser, a second electron tube having a cathode, an anode and a grid, a galvanic connection between said.
- connecting means connecting said two tubes in push-pull to constitute an amplifier, a cathode resistor associated with said second tube and connected in series with the cathode thereof to bias the cathode of said second tube to a potential above that of said grid of said second tube, a cathode resistor associated with said rst tube and connected in series with the cathode thereof to bias the cathode of said first tube to a potential substantially higher than said bias potential iirst mentioned and sufficiently high so that said cathode of said first tube is at all times more positive than the grid of said first tube.
- An arrangement according to claim l further comprising a screen grid tube common to the two condensers and having a cathode, a control grid, a second grid and an anode, and connections from said anode to one of said condensers and from said cathode to the other of said condensers, and from said screen grid to the opposite sides of said two condensers to effect a discharge thereof.
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Dc-Dc Converters (AREA)
- X-Ray Techniques (AREA)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE206050X | 1937-09-03 |
Publications (1)
Publication Number | Publication Date |
---|---|
US2225469A true US2225469A (en) | 1940-12-17 |
Family
ID=5790401
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US233764A Expired - Lifetime US2225469A (en) | 1937-09-03 | 1938-10-07 | Relaxation arrangement for deflecting cathode rays |
Country Status (6)
Country | Link |
---|---|
US (1) | US2225469A (fr) |
BE (1) | BE429983A (fr) |
CH (1) | CH206050A (fr) |
FR (1) | FR842916A (fr) |
GB (1) | GB503468A (fr) |
NL (1) | NL54428C (fr) |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2482194A (en) * | 1944-05-13 | 1949-09-20 | Du Mont Allen B Lab Inc | Ballistoscope |
US2519278A (en) * | 1944-11-01 | 1950-08-15 | Bell Telephone Labor Inc | Pulse-actuated circuit |
US2653274A (en) * | 1945-09-06 | 1953-09-22 | Horace W Babcock | Cathode-ray deflection circuit |
US2677127A (en) * | 1942-08-21 | 1954-04-27 | Robert M Page | Radio echo indicating apparatus |
US2987698A (en) * | 1945-03-30 | 1961-06-06 | Isaac P Rodman | Indicating a selected target echo in an echo wave train obtained by echo ranging |
-
0
- NL NL54428D patent/NL54428C/xx active
- BE BE429983D patent/BE429983A/xx unknown
-
1938
- 1938-08-22 CH CH206050D patent/CH206050A/de unknown
- 1938-09-02 FR FR842916D patent/FR842916A/fr not_active Expired
- 1938-09-02 GB GB25738/38A patent/GB503468A/en not_active Expired
- 1938-10-07 US US233764A patent/US2225469A/en not_active Expired - Lifetime
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2677127A (en) * | 1942-08-21 | 1954-04-27 | Robert M Page | Radio echo indicating apparatus |
US2482194A (en) * | 1944-05-13 | 1949-09-20 | Du Mont Allen B Lab Inc | Ballistoscope |
US2519278A (en) * | 1944-11-01 | 1950-08-15 | Bell Telephone Labor Inc | Pulse-actuated circuit |
US2987698A (en) * | 1945-03-30 | 1961-06-06 | Isaac P Rodman | Indicating a selected target echo in an echo wave train obtained by echo ranging |
US2653274A (en) * | 1945-09-06 | 1953-09-22 | Horace W Babcock | Cathode-ray deflection circuit |
Also Published As
Publication number | Publication date |
---|---|
BE429983A (fr) | |
CH206050A (de) | 1939-07-15 |
NL54428C (fr) | |
GB503468A (en) | 1939-04-06 |
FR842916A (fr) | 1939-06-21 |
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