GB1492509A - Supply circuit for a television receiver - Google Patents
Supply circuit for a television receiverInfo
- Publication number
- GB1492509A GB1492509A GB22963/76A GB2296376A GB1492509A GB 1492509 A GB1492509 A GB 1492509A GB 22963/76 A GB22963/76 A GB 22963/76A GB 2296376 A GB2296376 A GB 2296376A GB 1492509 A GB1492509 A GB 1492509A
- Authority
- GB
- United Kingdom
- Prior art keywords
- thyristor
- circuit
- transformer
- diode
- switched
- 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
- H04N3/185—Maintaining dc voltage constant
-
- 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
- H03K4/83—Generating pulses having essentially a finite slope or stepped portions having triangular shape having sawtooth shape using as active elements semiconductor devices with more than two PN junctions or with more than three electrodes or more than one electrode connected to the same conductivity region
Landscapes
- Engineering & Computer Science (AREA)
- Multimedia (AREA)
- Signal Processing (AREA)
- Details Of Television Scanning (AREA)
- Television Receiver Circuits (AREA)
Abstract
1492509 Cathode-ray tube circuits INTERNATIONAL STANDARD ELECTRIC CORP 3 June 1976 [5 June 1975] 22963/76 Heading H4T [Also in Division H2F] To allow isolation of TV receiver circuits from the mains, the horizontal scanning circuit 20 is driven by an isolating transformer 10, and in turn supplies energy to other units, the supply to primary winding 11 being switched alternately on and off by respectively a thyristor switch stage and a control stage sensitive to the total energy demand. Known scanning circuit 20, provided with energy from secondary winding 12 of transformer 10 via diode 24, is driven by horizontal oscillator 18, switching diode-shunted commutating thyristor 23 which via commutating LC circuit 25, 26 causes diode-shunted switching thyristor 22 to turn off. The circuit supplies combined deflection coil and EHT transformer 21, the amplitude of the flyback pulse from which is a function of the energy demand of the complete receiver. The input transformer 10 is supplied from rectified mains supply B via chopper thyristor and diode 13, 14 switched on by the horizontal oscillator 18 via isolating transformer 19, and switched off at a later instant by commutation of current in resonant LC circuit 15a, 16. Winding 15b, isolated from 15a controls the inductance of 15a in transductor 15 and hence its tuning; the control signal from tapping 211 on the EHT output, via control circuit 17, thus ensures that the duty cycle of thyristor 13 is modified according to the total energy demand.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE2525122A DE2525122C3 (en) | 1975-06-05 | 1975-06-05 | Feed circuit for a thyristor horizontal deflection stage of a television receiver |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB1492509A true GB1492509A (en) | 1977-11-23 |
Family
ID=5948373
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB22963/76A Expired GB1492509A (en) | 1975-06-05 | 1976-06-03 | Supply circuit for a television receiver |
Country Status (9)
| Country | Link |
|---|---|
| JP (1) | JPS5217721A (en) |
| DE (1) | DE2525122C3 (en) |
| DK (1) | DK243976A (en) |
| FI (1) | FI761550A (en) |
| FR (1) | FR2313830A1 (en) |
| GB (1) | GB1492509A (en) |
| IT (1) | IT1061062B (en) |
| NL (1) | NL7605584A (en) |
| SE (1) | SE404746B (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4232254A (en) * | 1978-11-29 | 1980-11-04 | Rca Corporation | Regulated deflection circuit |
| US4209731A (en) * | 1978-11-30 | 1980-06-24 | Rca Corporation | Magnetic switching regulator for a deflection circuit |
| FR2446572A1 (en) * | 1979-01-09 | 1980-08-08 | Thomson Brandt | LINE-SCANNING CIRCUIT FOR TELEVISION RECEIVER |
| DE3028589C2 (en) * | 1980-07-28 | 1982-10-14 | Norddeutsche Mende Rundfunk Kg, 2800 Bremen | Regulated safety switching power supply |
| DE3508267A1 (en) * | 1985-03-08 | 1986-09-11 | Deutsche Thomson-Brandt Gmbh, 7730 Villingen-Schwenningen | DEFLECTION POWER SUPPLY CONCEPT FOR TELEVISION EQUIPMENT |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2250857C3 (en) * | 1972-10-17 | 1979-04-26 | Standard Elektrik Lorenz Ag, 7000 Stuttgart | Horizontal deflection circuit for television receivers |
-
1975
- 1975-06-05 DE DE2525122A patent/DE2525122C3/en not_active Expired
-
1976
- 1976-05-25 NL NL7605584A patent/NL7605584A/en not_active Application Discontinuation
- 1976-06-02 SE SE7606198A patent/SE404746B/en unknown
- 1976-06-02 FI FI761550A patent/FI761550A/fi not_active Application Discontinuation
- 1976-06-03 GB GB22963/76A patent/GB1492509A/en not_active Expired
- 1976-06-03 FR FR7616799A patent/FR2313830A1/en active Granted
- 1976-06-03 DK DK243976A patent/DK243976A/en unknown
- 1976-06-03 IT IT23894/76A patent/IT1061062B/en active
- 1976-06-04 JP JP51064666A patent/JPS5217721A/en active Pending
Also Published As
| Publication number | Publication date |
|---|---|
| SE404746B (en) | 1978-10-23 |
| IT1061062B (en) | 1982-10-20 |
| NL7605584A (en) | 1976-12-07 |
| DE2525122C3 (en) | 1981-11-26 |
| JPS5217721A (en) | 1977-02-09 |
| FI761550A (en) | 1976-12-06 |
| FR2313830B1 (en) | 1980-02-08 |
| FR2313830A1 (en) | 1976-12-31 |
| DE2525122A1 (en) | 1976-12-09 |
| SE7606198L (en) | 1976-12-06 |
| DE2525122B2 (en) | 1981-02-05 |
| DK243976A (en) | 1976-12-06 |
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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 |