GB619938A - Apparatus including a thermionic tube amplifier for the pick-up and recording of the cardiac function and the like movements of living or other bodies - Google Patents
Apparatus including a thermionic tube amplifier for the pick-up and recording of the cardiac function and the like movements of living or other bodiesInfo
- Publication number
- GB619938A GB619938A GB2609/40A GB260940A GB619938A GB 619938 A GB619938 A GB 619938A GB 2609/40 A GB2609/40 A GB 2609/40A GB 260940 A GB260940 A GB 260940A GB 619938 A GB619938 A GB 619938A
- Authority
- GB
- United Kingdom
- Prior art keywords
- tube
- stages
- anode
- resistance
- stabilizer
- 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
- H03F1/00—Details of amplifiers with only discharge tubes, only semiconductor devices or only unspecified devices as amplifying elements
- H03F1/08—Modifications of amplifiers to reduce detrimental influences of internal impedances of amplifying elements
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- External Artificial Organs (AREA)
- Amplifiers (AREA)
Abstract
619,938. Valve amplifying circuits. ERDELY ES SZABO. Feb. 10, 1940, No. 2609. Convention date, April 24, 1939. [A Specification was laid open to inspection under Sect. 91 of the Acts, Aug. 12, 1940.] [Class 40 (vi)] In a thermionic valve amplifier particularly for an electro-cardiograph, the supply voltage is subjected to at least two stages of stabilization, one of which comprises a voltage stabilizing tube, and the other or further stages comprise either a second stabilizing tube, or a voltage stabilizing transformer, or a motor generator having high inertia. As shown, the anode and screen supply voltages of the input stage 1 are stabilized by resistance 13 and fourstage stabilizer tube 10, followed by resistance 12 and two stabilizer tubes 6, 7. The second and third amplifier stages 14, 15 have their supply voltages stabilized by the tube 10 only. One of the stabilizer stages may be replaced by a voltage stabilizing transformer or a motor generator connected to the supply source which may be A.C. or D.C. mains, or a car battery. Further, the anode resistance 11 of the input tube is adjusted so that the effects of fluctuations of the anode and screen grid voltages are self-compensating.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| HU619938X | 1939-04-25 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB619938A true GB619938A (en) | 1949-03-17 |
Family
ID=10979766
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB2609/40A Expired GB619938A (en) | 1939-04-25 | 1940-02-10 | Apparatus including a thermionic tube amplifier for the pick-up and recording of the cardiac function and the like movements of living or other bodies |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB619938A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE883454C (en) * | 1944-07-01 | 1953-07-16 | Siemens Ag | Feedback tube generator |
| CN115089188A (en) * | 2022-06-09 | 2022-09-23 | 北京三春晖医疗器械有限公司 | Current detection circuit and integrated circuit |
-
1940
- 1940-02-10 GB GB2609/40A patent/GB619938A/en not_active Expired
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE883454C (en) * | 1944-07-01 | 1953-07-16 | Siemens Ag | Feedback tube generator |
| CN115089188A (en) * | 2022-06-09 | 2022-09-23 | 北京三春晖医疗器械有限公司 | Current detection circuit and integrated circuit |
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