GB1234217A - - Google Patents
Info
- Publication number
- GB1234217A GB1234217A GB1234217DA GB1234217A GB 1234217 A GB1234217 A GB 1234217A GB 1234217D A GB1234217D A GB 1234217DA GB 1234217 A GB1234217 A GB 1234217A
- Authority
- GB
- United Kingdom
- Prior art keywords
- transistor
- output transistor
- circuit
- supply
- inductor
- 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
- 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
-
- 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
- H04N3/22—Circuits for controlling dimensions, shape or centering of picture on screen
- H04N3/223—Controlling dimensions
Landscapes
- Engineering & Computer Science (AREA)
- Multimedia (AREA)
- Signal Processing (AREA)
- Details Of Television Scanning (AREA)
Abstract
1,234,217. Transistor sawtooth circuit. SIEMENS A.G. 6 June, 1968 [7 June, 1967; 25 July, 1967], No. 26900/68. Heading H3T. In a line deflection stage, e.g. for a television receiver, a parallel resonant circuit LC is connected across the line output transistor T 10 , a reverse diode D shunted across the output transistor and the supply voltage U G is connected only during the beginning of each flyback period when the output transistor T 10 is blocked. This arrangement minimizes the voltage across the output transistor T 10 . As described, each flyback is initiated by a positive synchronizing pulse fed to winding L 50 and coupled to the base of transistor T 10 via winding L 30 . The switching transistor T 20 becomes turned on when the oscillatory current through L 10 and C L has reached a predetermined value, thus connecting the supply U G which supplies energy to the parallel circuit LC. The forward sweep is initiated by a negative synchronizing pulse fed to L 50 which blocks switching transistor T 20 so that the collector voltage decreases until diode D becomes conductive, initiating a forward sweep. Inductor L may be the deflection coil; capacitor C s providing S-correction. In Fig. 3 (not shown), capacitor C is connected between the collector and the junction of a pair of series connected transistors arranged to be conductive alternately under control of transformer-coupled synchronizing pulses. In Fig. 1 (not shown), the transformers L 10 , L 30 . . . L 50 are omitted, the supply being switched in to the collectors via a current limiting resistor, inductor or harmonic-tuned circuit.
Applications Claiming Priority (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DES0110223 | 1967-06-07 | ||
DES0110995 | 1967-07-25 | ||
DES111157A DE1302001B (en) | 1967-06-07 | 1967-08-02 | Circuit arrangement for horizontal deflection in television sets |
DE1298124 | 1968-06-26 |
Publications (1)
Publication Number | Publication Date |
---|---|
GB1234217A true GB1234217A (en) | 1971-06-03 |
Family
ID=27430508
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB1234217D Expired GB1234217A (en) | 1967-06-07 | 1968-06-06 |
Country Status (7)
Country | Link |
---|---|
AT (1) | AT277334B (en) |
CH (1) | CH482372A (en) |
DE (1) | DE1302160B (en) |
FR (1) | FR1570783A (en) |
GB (1) | GB1234217A (en) |
NL (1) | NL6806764A (en) |
SE (1) | SE354396B (en) |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2135064B1 (en) * | 1971-05-04 | 1975-04-18 | Radiotechnique Compelec | |
JPS5411778Y2 (en) * | 1973-01-19 | 1979-05-25 | ||
NL7501339A (en) * | 1975-02-05 | 1976-08-09 | Philips Nv | SWITCHING DEVICE IN A TELEVISION RECEIVER, EQUIPPED WITH A LINE BENDING CIRCUIT AND WITH A SWITCHED POWER SUPPLY CIRCUIT. |
IT1165134B (en) * | 1978-07-20 | 1987-04-22 | Rca Corp | DEFLECTION CIRCUIT STABILIZED WITH A STABILIZED SWITCH CONTROLLED BY THE DEFELSSION CURRENT |
-
0
- DE DES110995A patent/DE1302160B/de not_active Withdrawn
-
1968
- 1968-05-13 NL NL6806764A patent/NL6806764A/xx unknown
- 1968-06-05 CH CH839568A patent/CH482372A/en not_active IP Right Cessation
- 1968-06-06 FR FR1570783D patent/FR1570783A/fr not_active Expired
- 1968-06-06 GB GB1234217D patent/GB1234217A/en not_active Expired
- 1968-06-06 AT AT541068A patent/AT277334B/en not_active IP Right Cessation
- 1968-06-07 SE SE774468A patent/SE354396B/xx unknown
Also Published As
Publication number | Publication date |
---|---|
NL6806764A (en) | 1968-12-09 |
DE1302160B (en) | 1970-05-27 |
SE354396B (en) | 1973-03-05 |
AT277334B (en) | 1969-12-29 |
CH482372A (en) | 1969-11-30 |
FR1570783A (en) | 1969-06-13 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
PS | Patent sealed | ||
PCNP | Patent ceased through non-payment of renewal fee |