GB1323519A - Power supply units - Google Patents
Power supply unitsInfo
- Publication number
- GB1323519A GB1323519A GB5644571A GB5644571A GB1323519A GB 1323519 A GB1323519 A GB 1323519A GB 5644571 A GB5644571 A GB 5644571A GB 5644571 A GB5644571 A GB 5644571A GB 1323519 A GB1323519 A GB 1323519A
- Authority
- GB
- United Kingdom
- Prior art keywords
- transistor
- eht
- supply
- output
- winding
- 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
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M3/00—Conversion of dc power input into dc power output
- H02M3/02—Conversion of dc power input into dc power output without intermediate conversion into ac
- H02M3/04—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters
- H02M3/10—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
- H02M3/145—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal
- H02M3/155—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only
- H02M3/156—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of output voltage or current, e.g. switching regulators
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Multimedia (AREA)
- Signal Processing (AREA)
- Details Of Television Scanning (AREA)
Abstract
1323519 Converting ATES COMPONENTI ELETTRONICI SpA 6 Dec 1971 [5 Dec 1970] 56445/71 Heading H2F A power supply unit for a television receiver, comprises a rectifier D 1 operative on the mains supply Vr, a first smoothing circuit C 3 and a chopping transistor TR 1 operative on the output of the first smoothing circuit, the output being regulated by means of a second transistor TR 2 shunting the base circuit of TR 1 and controlled by a signal dependent on the cathoderay tube beam current. The invention is applicable to use with an EHT supply having an impedance less than 2À5 Megohms. As described, the rectified mains supply is smoothed by C 3 and chopped by transistor TR 1 controlled by linefrequency pulses from winding T 4 of the EHT transformer TAT. The chopped output is smoothed by the primary winding T 1 of the EHT transformer TAT and by capacitor C 8 so as to provide + 32V for the rest of the receiver. The EHT transformer TAT is tuned by L 1 , L 2 , C 7 to the fifth harmonic of the flyback frequency, the EHT being produced by rectifying at D 6 , the flyback pulses induced in winding T 2 . Variation in cathode-ray tube beam current provides a corresponding variation in the voltage of pulses induced into winding T 4 ; this volatage is rectified at D 3 and used to vary the conductivity of TR 2 and hence adjust the current in the chopping transistor TR 1 . Starting arrangements.-Initially the line oscillator Os and the horizontal deflection circuit FO are driven by a potential derived from the output of rectifier D 1 via capacitor C 1 and diode D 2 . This diode isolates the starting supply when the chopper-stabilized + 32V supply is operating. Protection.-Resistor R 12 protects the circuit in the event of damage to transistor TR 1 ; dissipation on R 12 during normal operation is reduced by C 4 .
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| IT3268670 | 1970-12-05 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB1323519A true GB1323519A (en) | 1973-07-18 |
Family
ID=11235577
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB5644571A Expired GB1323519A (en) | 1970-12-05 | 1971-12-06 | Power supply units |
Country Status (3)
| Country | Link |
|---|---|
| DE (1) | DE2160420C3 (en) |
| FR (1) | FR2116355B1 (en) |
| GB (1) | GB1323519A (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| IT1119059B (en) * | 1979-04-05 | 1986-03-03 | Indesit | POWER CIRCUIT FOR A TELEVISION RECEIVER |
-
1971
- 1971-05-04 FR FR7116099A patent/FR2116355B1/fr not_active Expired
- 1971-12-06 GB GB5644571A patent/GB1323519A/en not_active Expired
- 1971-12-06 DE DE19712160420 patent/DE2160420C3/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| FR2116355B1 (en) | 1974-03-08 |
| DE2160420B2 (en) | 1973-09-27 |
| DE2160420A1 (en) | 1972-06-22 |
| DE2160420C3 (en) | 1974-04-18 |
| FR2116355A1 (en) | 1972-07-13 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PS | Patent sealed | ||
| PCNP | Patent ceased through non-payment of renewal fee |