GB454471A - Relaxation oscillation circuit for interlaced scanning in television - Google Patents
Relaxation oscillation circuit for interlaced scanning in televisionInfo
- Publication number
- GB454471A GB454471A GB32284/35A GB3228435A GB454471A GB 454471 A GB454471 A GB 454471A GB 32284/35 A GB32284/35 A GB 32284/35A GB 3228435 A GB3228435 A GB 3228435A GB 454471 A GB454471 A GB 454471A
- Authority
- GB
- United Kingdom
- Prior art keywords
- discharge
- condenser
- tube
- cathode
- television
- 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
- H03K4/86—Generating pulses having essentially a finite slope or stepped portions having triangular shape having sawtooth shape using as active elements gas-filled tubes or spark-gaps
Landscapes
- Details Of Television Scanning (AREA)
- Oscillators With Electromechanical Resonators (AREA)
Abstract
454,471. Television. RADIOAKT.- GES. D. S. LOEWE, 10, Wiesenweg, Steglitz, Berlin. Nov. 21, 1935, No. 32284. Convention date, Nov. 23, 1934. [Classes 40 (iii) and 40 (v)] The initiation of the discharge in a relaxation oscillator for a cathode-ray tube in a receiver using interlaced scanning is controlled by impulses from the transmitter, and the termination of the discharge is determined by voltages generated at the receiver. The discharge is terminated by giving the potential of the cathode 5 of the discharge tube 3 a positive value sufficient to quench the discharge. For this purpose, the cathode is earthed through a condenser 14 in parallel with a resistance 15. The time constant of the condenser is much greater than the time of the discharge. Alternatively, simultaneously with the triggering of the discharge tube, a valve is operated to cause the charging of a condenser through a resistance with a properly adjusted time constant, and on complete charging, after a fixed period of time, the discharge of the tube 3 is interrupted.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE454471X | 1934-11-23 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB454471A true GB454471A (en) | 1936-10-01 |
Family
ID=6538917
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB32284/35A Expired GB454471A (en) | 1934-11-23 | 1935-11-21 | Relaxation oscillation circuit for interlaced scanning in television |
Country Status (4)
| Country | Link |
|---|---|
| US (1) | US2152822A (en) |
| BE (1) | BE412388A (en) |
| FR (1) | FR798087A (en) |
| GB (1) | GB454471A (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2608128A (en) * | 1949-03-09 | 1952-08-26 | W M Welsh Mfg Company | Phototube amplification |
| US2915677A (en) * | 1952-12-26 | 1959-12-01 | Ibm | Gas tube pulse generator |
| US2717336A (en) * | 1953-05-08 | 1955-09-06 | Michael Res Company Inc | Flasher circuit |
| US2973484A (en) * | 1958-09-16 | 1961-02-28 | Roy Ross F De | Frequency division system for electronic organ or the like |
-
0
- BE BE412388D patent/BE412388A/xx unknown
-
1935
- 1935-11-20 US US50738A patent/US2152822A/en not_active Expired - Lifetime
- 1935-11-21 GB GB32284/35A patent/GB454471A/en not_active Expired
- 1935-11-22 FR FR798087D patent/FR798087A/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| FR798087A (en) | 1936-05-08 |
| BE412388A (en) | |
| US2152822A (en) | 1939-04-04 |
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