GB1475772A - Television line-deflection circuit - Google Patents
Television line-deflection circuitInfo
- Publication number
- GB1475772A GB1475772A GB2376974A GB2376974A GB1475772A GB 1475772 A GB1475772 A GB 1475772A GB 2376974 A GB2376974 A GB 2376974A GB 2376974 A GB2376974 A GB 2376974A GB 1475772 A GB1475772 A GB 1475772A
- Authority
- GB
- United Kingdom
- Prior art keywords
- deflection
- scan
- winding
- supply
- trace
- 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
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N3/00—Scanning details of television systems; Combination thereof with generation of supply voltages
- H04N3/10—Scanning details of television systems; Combination thereof with generation of supply voltages by means not exclusively optical-mechanical
- H04N3/16—Scanning details of television systems; Combination thereof with generation of supply voltages by means not exclusively optical-mechanical by deflecting electron beam in cathode-ray tube, e.g. scanning corrections
- H04N3/18—Generation of supply voltages, in combination with electron beam deflecting
- H04N3/19—Arrangements or assemblies in supply circuits for the purpose of withstanding high voltages
-
- 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
- H03K4/48—Generating pulses having essentially a finite slope or stepped portions having triangular shape having sawtooth shape using as active elements semiconductor devices
- H03K4/60—Generating pulses having essentially a finite slope or stepped portions having triangular shape having sawtooth shape using as active elements semiconductor devices in which a sawtooth current is produced through an inductor
- H03K4/62—Generating pulses having essentially a finite slope or stepped portions having triangular shape having sawtooth shape using as active elements semiconductor devices in which a sawtooth current is produced through an inductor using a semiconductor device operating as a switching device
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N3/00—Scanning details of television systems; Combination thereof with generation of supply voltages
- H04N3/10—Scanning details of television systems; Combination thereof with generation of supply voltages by means not exclusively optical-mechanical
- H04N3/16—Scanning details of television systems; Combination thereof with generation of supply voltages by means not exclusively optical-mechanical by deflecting electron beam in cathode-ray tube, e.g. scanning corrections
- H04N3/18—Generation of supply voltages, in combination with electron beam deflecting
Landscapes
- Engineering & Computer Science (AREA)
- Multimedia (AREA)
- Signal Processing (AREA)
- Details Of Television Scanning (AREA)
- Television Receiver Circuits (AREA)
- Dc-Dc Converters (AREA)
Abstract
1475772 D.C.-D.C. converters PHILIPS ELECTRONIC & ASSOCIATED INDUSTRIES Ltd 29 May 1974 [1 June 1973 17 Nov 1973] 23769/74 Heading H2F [Also in Division H3] In a combined line deflection circuit and variable duty-cycle voltage supply therefor, of the type comprising a resonant circuit including deflection coils L y , trace capacitor C t and retrace capacitor C r , a further voltage supply (e.g. EHT) winding L 4 on a transformer T is more closely coupled to a winding L 3 , supplied with deflection current, than to the supply winding L 1 . This arrangement minimises the step during the trace period and facilitates fifth harmonic tuning. As described, D1 is conductive during the first part of the scan, the trace capacitor C t discharging via the deflection coils L y . T r is turned on during the first half of the scan, so as to pass the reversed deflection current via D2. The scan is terminated by turning off T r so that C r and L y provide the half cycle of flyback occillation which is rectified by D4 to provide EHT. D1 becomes conductive at the end of the half cycle to initiate a new scan. The scan amplitude is stabilized by feedback from C t to a pulse-width modulator D r . C3 minimises parasitic oscillation. Fig. 4 (not shown) graphically depicts the offset of varying the turns ratio L3/L2 and the coupling (which may be O). Fig. 7 (not shown) relates to a threelegged core for transformer T having an air gap in each outer limb and a centre limb forming a coupling-reducing shunt. Modification. In Fig. 9c the pulse-width modulated supply is provided by a further transistor T r while the line deflection transistor T r is controlled by a further winding L6. Diode D1 may be formed by the base/collector of T r <SP>1</SP>. In Fig. 6 (not shown) L y and C t are connected to tappings on L3. The lower end of L4 is connected to A. In Figs. 9a and 9b (not shown) C1 and L3 are transposed, D3 being connected to their common junction. Fig. 8b relates to a circuit having no D.C. path between the supply side (T r L<SP>1</SP> 2 ) and the deflection side, thus facilitating mains isolation.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| NL7307631.A NL160129C (en) | 1973-06-01 | 1973-06-01 | COMBINED POWER SUPPLY STABILIZATION AND IMAGE CONTROL DEFLECTION, AND IMAGE DISPLAY DEVICES THEREOF. |
| NL7315792A NL7315792A (en) | 1973-11-17 | 1973-11-17 | SWITCHING DEVICE EQUIPPED WITH A LINE-BENDING SWITCH. |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB1475772A true GB1475772A (en) | 1977-06-10 |
Family
ID=26644888
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB2376974A Expired GB1475772A (en) | 1973-06-01 | 1974-05-29 | Television line-deflection circuit |
Country Status (15)
| Country | Link |
|---|---|
| JP (1) | JPS5333405B2 (en) |
| AR (1) | AR201771A1 (en) |
| AT (1) | AT333862B (en) |
| BE (1) | BE815763A (en) |
| BR (1) | BR7404391D0 (en) |
| CA (1) | CA1037601A (en) |
| CH (1) | CH573199A5 (en) |
| DE (1) | DE2426661C3 (en) |
| DK (1) | DK138720B (en) |
| ES (1) | ES426768A1 (en) |
| FI (1) | FI165174A (en) |
| FR (1) | FR2232147B1 (en) |
| GB (1) | GB1475772A (en) |
| IT (1) | IT1012920B (en) |
| SE (1) | SE397039B (en) |
Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1529052A (en) * | 1976-05-14 | 1978-10-18 | Indesit | Circuit arrangement for obtaining a sawtooth current in a coil |
| IT1063185B (en) * | 1976-06-05 | 1985-02-11 | Indesit | Sawtooth current generator for TV - has energy stored in coil transferred to parallel resonant circuit during flyback period (NL 19.12.77) |
| IT1072136B (en) * | 1976-12-07 | 1985-04-10 | Indesit | CIRCUIT TO OBTAIN A SAW TOOTH CURRENT IN A COIL |
| IT1082972B (en) * | 1977-04-06 | 1985-05-21 | Indesit | CIRCUIT TO OBTAIN A SAW TOOTH CURRENT IN A COIL |
| IT1082803B (en) * | 1977-05-04 | 1985-05-21 | Indesit | CIRCUIT TO OBTAIN A SAW TOOTH CURRENT IN A COIL |
| JPS5484425A (en) * | 1977-12-19 | 1979-07-05 | Sony Corp | Switching regulator |
| FR2432251A1 (en) * | 1978-07-25 | 1980-02-22 | Thomson Brandt | SUPPLY CIRCUIT STABILIZED IN COMBINATION WITH THE HORIZONTAL SCANNING CIRCUIT OF A VIDEO FREQUENCY RECEIVER, AND RECEIVER PROVIDED WITH SUCH A CIRCUIT |
| JPS61281460A (en) * | 1985-04-24 | 1986-12-11 | Sanyo Electric Co Ltd | Alkaline zinc storage battery |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS4115853Y1 (en) * | 1964-05-30 | 1966-07-25 | ||
| NO123469B (en) * | 1970-06-23 | 1971-11-22 | Jan Wessels Radiofabrikk Radio |
-
1974
- 1974-05-28 IT IT23304/74A patent/IT1012920B/en active
- 1974-05-28 DK DK288674AA patent/DK138720B/en unknown
- 1974-05-29 CA CA201,131A patent/CA1037601A/en not_active Expired
- 1974-05-29 SE SE7407065A patent/SE397039B/en unknown
- 1974-05-29 BR BR4391/74A patent/BR7404391D0/en unknown
- 1974-05-29 FI FI1651/74A patent/FI165174A/fi unknown
- 1974-05-29 GB GB2376974A patent/GB1475772A/en not_active Expired
- 1974-05-30 AR AR253995A patent/AR201771A1/en active
- 1974-05-30 BE BE144941A patent/BE815763A/en unknown
- 1974-05-30 ES ES426768A patent/ES426768A1/en not_active Expired
- 1974-05-31 FR FR7419048A patent/FR2232147B1/fr not_active Expired
- 1974-05-31 CH CH753574A patent/CH573199A5/xx not_active IP Right Cessation
- 1974-05-31 JP JP6099174A patent/JPS5333405B2/ja not_active Expired
- 1974-05-31 AT AT453074A patent/AT333862B/en not_active IP Right Cessation
- 1974-06-01 DE DE2426661A patent/DE2426661C3/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| DE2426661B2 (en) | 1978-04-27 |
| SE7407065L (en) | 1974-12-02 |
| BR7404391D0 (en) | 1975-01-07 |
| AU6949974A (en) | 1975-12-04 |
| DK138720B (en) | 1978-10-16 |
| IT1012920B (en) | 1977-03-10 |
| AR201771A1 (en) | 1975-04-15 |
| ATA453074A (en) | 1976-04-15 |
| JPS5036025A (en) | 1975-04-04 |
| JPS5333405B2 (en) | 1978-09-13 |
| FI165174A (en) | 1974-12-02 |
| SE397039B (en) | 1977-10-10 |
| CH573199A5 (en) | 1976-02-27 |
| AT333862B (en) | 1976-12-10 |
| BE815763A (en) | 1974-12-02 |
| DK138720C (en) | 1979-03-19 |
| CA1037601A (en) | 1978-08-29 |
| FR2232147A1 (en) | 1974-12-27 |
| DE2426661A1 (en) | 1974-12-19 |
| DE2426661C3 (en) | 1978-12-14 |
| DK288674A (en) | 1975-01-27 |
| ES426768A1 (en) | 1977-01-16 |
| FR2232147B1 (en) | 1980-08-29 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PS | Patent sealed [section 19, patents act 1949] | ||
| PCNP | Patent ceased through non-payment of renewal fee |