GB1238499A - - Google Patents
Info
- Publication number
- GB1238499A GB1238499A GB1238499DA GB1238499A GB 1238499 A GB1238499 A GB 1238499A GB 1238499D A GB1238499D A GB 1238499DA GB 1238499 A GB1238499 A GB 1238499A
- Authority
- GB
- United Kingdom
- Prior art keywords
- harmonics
- deflection
- determined
- generators
- transformers
- 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
Links
Classifications
-
- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G1/00—Control arrangements or circuits, of interest only in connection with cathode-ray tube indicators; General aspects or details, e.g. selection emphasis on particular characters, dashed line or dotted line generation; Preprocessing of data
- G09G1/06—Control arrangements or circuits, of interest only in connection with cathode-ray tube indicators; General aspects or details, e.g. selection emphasis on particular characters, dashed line or dotted line generation; Preprocessing of data using single beam tubes, e.g. three-dimensional or perspective representation, rotation or translation of display pattern, hidden lines, shadows
- G09G1/08—Control arrangements or circuits, of interest only in connection with cathode-ray tube indicators; General aspects or details, e.g. selection emphasis on particular characters, dashed line or dotted line generation; Preprocessing of data using single beam tubes, e.g. three-dimensional or perspective representation, rotation or translation of display pattern, hidden lines, shadows the beam directly tracing characters, the information to be displayed controlling the deflection and the intensity as a function of time in two spatial co-ordinates, e.g. according to a cartesian co-ordinate system
- G09G1/12—Control arrangements or circuits, of interest only in connection with cathode-ray tube indicators; General aspects or details, e.g. selection emphasis on particular characters, dashed line or dotted line generation; Preprocessing of data using single beam tubes, e.g. three-dimensional or perspective representation, rotation or translation of display pattern, hidden lines, shadows the beam directly tracing characters, the information to be displayed controlling the deflection and the intensity as a function of time in two spatial co-ordinates, e.g. according to a cartesian co-ordinate system the deflection signals being produced by essentially analogue means
Landscapes
- Engineering & Computer Science (AREA)
- Radar, Positioning & Navigation (AREA)
- Remote Sensing (AREA)
- Physics & Mathematics (AREA)
- Computer Hardware Design (AREA)
- General Physics & Mathematics (AREA)
- Theoretical Computer Science (AREA)
- Physical Or Chemical Processes And Apparatus (AREA)
Abstract
1,238,499. Cathode-ray tube displays. ELEKTRONISCHE RECHENMASCHINEN WISSENSCHAFTLICHER INDUSTRIEBETRIEB KARL MARX STADT VEB. 29 Nov., 1968, No. 56843/68. Heading H4T. In an arrangement for tracing characters &c. on the screen of a cathode-ray tube by means of appropriate X, Y deflection waveforms the latter are produced by combining harmonics of the sine and cosine phases of a fundamental sinusoidal oscillation in proportions determined by Fourier synthesis, the combining being effected at a summation point which, for each co-ordinate deflection waveforms X, Y, includes a transformer in the primary of which the harmonics appropriate to the respective deflection waveform are combined and one end of the secondary of which is connected to the input of the respective deflection amplifier via an OR gate whilst the other end of the secondaries of both transformers are connected to a character selection (transistor) switch. Thus, as shown, the outputs of fundamental frequency sine and cosine wave generators 1 and 6 respectively and of the 2nd to 5th harmonics of the sine wave, generators 2 to 5 respectively and the 2nd to 5th harmonics of the cosine wave, generators 7 to 10 respectively, are supplied to respective transformers 11 from the secondaries of which voltages having the required polarities (determined by the sense of the secondary windings) and the required mag- -nitude (determined by resistors 13 to 23) are combined in the primary windings of respective transformers 27, 28 the secondary windings of which are connected to the X and Y deflection amplifiers 33, 34 through respective OR gates 31, 32 and via weighting resistors 35, 36, the magnitudes of which are determined by the coefficient of the first term of-the Fourier series, to a character selection transistor 37.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB5684368 | 1968-11-29 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB1238499A true GB1238499A (en) | 1971-07-07 |
Family
ID=10477700
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB1238499D Expired GB1238499A (en) | 1968-11-29 | 1968-11-29 |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB1238499A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3239022A (en) * | 1961-05-16 | 1966-03-08 | Lansing Bagnall Ltd | Industrial trucks provided with air-lift castors |
| EP2689323A1 (en) * | 2011-03-22 | 2014-01-29 | Ess Technology, Inc. | Fir filter with reduced element count |
-
1968
- 1968-11-29 GB GB1238499D patent/GB1238499A/en not_active Expired
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3239022A (en) * | 1961-05-16 | 1966-03-08 | Lansing Bagnall Ltd | Industrial trucks provided with air-lift castors |
| EP2689323A1 (en) * | 2011-03-22 | 2014-01-29 | Ess Technology, Inc. | Fir filter with reduced element count |
| EP2689323A4 (en) * | 2011-03-22 | 2014-12-10 | Ess Technology Inc | Fir filter with reduced element count |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PS | Patent sealed | ||
| PLNP | Patent lapsed through nonpayment of renewal fees |