GB500991A - Low-frequency correction of television amplifiers - Google Patents
Low-frequency correction of television amplifiersInfo
- Publication number
- GB500991A GB500991A GB31288/37A GB3128837A GB500991A GB 500991 A GB500991 A GB 500991A GB 31288/37 A GB31288/37 A GB 31288/37A GB 3128837 A GB3128837 A GB 3128837A GB 500991 A GB500991 A GB 500991A
- Authority
- GB
- United Kingdom
- Prior art keywords
- resistance
- condenser
- correcting
- circuit
- low
- 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
- H03F—AMPLIFIERS
- H03F3/00—Amplifiers with only discharge tubes or only semiconductor devices as amplifying elements
- H03F3/02—Amplifiers with only discharge tubes or only semiconductor devices as amplifying elements with tubes only
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Optical Radar Systems And Details Thereof (AREA)
Abstract
500,991. Valve amplifying circuits. RADIOAKT.-GES. D. S. LOEWE. Nov. 15, 1937, Nos. 31288 and 31289. Convention dates, Nov. 14, 1936 and Dec. 12, 1936. [Class 40 (v)] In a mains-fed resistance-capacity coupled television amplifier, the increased amplification at low frequencies, caused by the smoothing circuit R2, C3 is compensated by including in the cathode lead a circuit comprising a correcting resistance R10 in parallel with a short-circuiting condenser C17 and with a correcting condenser C9 which is serially connected with the resistance R16, the correcting resistance and condenser having the values R10=R2/V, C9= C3.V, V being the correct amplification at high frequencies. By this means a continuous flashing of the light intensity of the image and incorrect light intensity values over large areas of the image are prevented. The grid bias is adjusted for optimum conditions by means of the battery 11. The dimensions of the compensating circuit are obtained by oscillographic observation of the output poten. tial obtained from a rectangular grid input potential. A number of stages corrected as above can be connected in cascade, the coupling elements 5, 12 being correctly dimensioned to avoid low-frequency loss. Fig. 1 (not shown) shows a compensating circuit comprising a correcting condenser in parallel with a connecting resistance as disclosed in Specification 459,251.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE500991X | 1936-11-14 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB500991A true GB500991A (en) | 1939-02-20 |
Family
ID=6545701
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB31288/37A Expired GB500991A (en) | 1936-11-14 | 1937-11-15 | Low-frequency correction of television amplifiers |
Country Status (2)
| Country | Link |
|---|---|
| BE (1) | BE424630A (en) |
| GB (1) | GB500991A (en) |
-
0
- BE BE424630D patent/BE424630A/xx unknown
-
1937
- 1937-11-15 GB GB31288/37A patent/GB500991A/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| BE424630A (en) |
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