GB505269A - Arrangements for generating electrical saw-tooth impulses - Google Patents
Arrangements for generating electrical saw-tooth impulsesInfo
- Publication number
- GB505269A GB505269A GB21188/37A GB2118837A GB505269A GB 505269 A GB505269 A GB 505269A GB 21188/37 A GB21188/37 A GB 21188/37A GB 2118837 A GB2118837 A GB 2118837A GB 505269 A GB505269 A GB 505269A
- Authority
- GB
- United Kingdom
- Prior art keywords
- plates
- potential
- oscillator
- valve
- tube
- 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
- H03K4/10—Generating pulses having essentially a finite slope or stepped portions having triangular shape having sawtooth shape using as active elements vacuum tubes only
- H03K4/12—Generating pulses having essentially a finite slope or stepped portions having triangular shape having sawtooth shape using as active elements vacuum tubes only in which a sawtooth voltage is produced across a capacitor
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Details Of Television Scanning (AREA)
- Television Receiver Circuits (AREA)
Abstract
505,269. Valve generating circuits. STANDARD TELEPHONES & CABLES, Ltd. July 30, 1937, No. 21188. Void. Convention date, Sept. 19, 1936. [Class 40 (v)] A relaxation oscillator for producing symmetrical impulses of saw tooth or similar form comprises a single condenser C, Fig. 1, charged through equal resistances R1, R2 and discharged periodically through a. gas discharge tube or high vacuum thermionic valve V. The discharging action is effected by varying the potential on the grid of V, and, in the case of a television receiver this is done by applying synchronizing pulses to it. The period of discharge may be reduced by the use of a back coupled high vacuum valve, Fig. 5 (not shown). Fig. 4 shows the oscillator connected to one pair of deflecting plates PX1, PX2 in a cathode ray tube. The variations in potential between the plates of condenser C are communicated to the deflecting plates through the condensers CA, CB, the anode An of the tube being maintained at the mean potential of the plates by means of the resistances RA, RB. The Specification describes a. complete circuit incorporating the oscillator for both vertical and horizontal deflection of the cathode ray, all the required voltages being obtained from one source of rectified alternating current, Fig. 6 (not shown).
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR823070T | 1936-09-19 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB505269A true GB505269A (en) | 1939-05-01 |
Family
ID=9281186
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB21188/37A Expired GB505269A (en) | 1936-09-19 | 1937-07-30 | Arrangements for generating electrical saw-tooth impulses |
Country Status (3)
| Country | Link |
|---|---|
| US (1) | US2213275A (en) |
| FR (1) | FR823070A (en) |
| GB (1) | GB505269A (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2487550A (en) * | 1944-10-28 | 1949-11-08 | Rca Corp | Centering means for cathode-ray deflecting circuits |
-
1936
- 1936-09-19 FR FR823070D patent/FR823070A/en not_active Expired
-
1937
- 1937-07-30 GB GB21188/37A patent/GB505269A/en not_active Expired
- 1937-08-25 US US160809A patent/US2213275A/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| FR823070A (en) | 1938-01-13 |
| US2213275A (en) | 1940-09-03 |
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