GB646581A - Improvements in or relating to direct-current voltage amplifiers - Google Patents
Improvements in or relating to direct-current voltage amplifiersInfo
- Publication number
- GB646581A GB646581A GB28294/47A GB2829447A GB646581A GB 646581 A GB646581 A GB 646581A GB 28294/47 A GB28294/47 A GB 28294/47A GB 2829447 A GB2829447 A GB 2829447A GB 646581 A GB646581 A GB 646581A
- Authority
- GB
- United Kingdom
- Prior art keywords
- switch
- feed
- input
- time
- time constant
- 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
- 239000003990 capacitor Substances 0.000 abstract 1
- 230000004048 modification Effects 0.000 abstract 1
- 238000012986 modification Methods 0.000 abstract 1
Classifications
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03F—AMPLIFIERS
- H03F3/00—Amplifiers with only discharge tubes or only semiconductor devices as amplifying elements
- H03F3/34—DC amplifiers in which all stages are DC-coupled
- H03F3/36—DC amplifiers in which all stages are DC-coupled with tubes only
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Amplifiers (AREA)
- X-Ray Techniques (AREA)
Abstract
646,581. Valve amplifying circuits. PHILIPS ELECTRICAL, Ltd. Oct. 22,1947, No. 28294. Convention date, Oct. 25, 1946. [Class 40 (vi)] In a D.C. amplifier in which the input is applied over a mechanically-operated switch in one position, a voltage derived from the output is fed back over a short time constant circuit to the amplifier when the switch is in the other position. A double-pole switch 4, 5 alternately connects the input 1, 2 to the grid circuit of valve 6 and the feed-back path comprising resistors 9, 10 and capacitor 11. The time constant of the feed-back path is made short compared with switching time, while the time constant of the combination 10, 11 is long. Preferably the ratio of the time during which the switch is connecting the input 1, 2 to the time when the feed-back path is completed, exceeds five. In a modification, Fig. 2 (not shown), a single pole switch is employed.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
NL646581X | 1946-10-25 |
Publications (1)
Publication Number | Publication Date |
---|---|
GB646581A true GB646581A (en) | 1950-11-22 |
Family
ID=19791943
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB28294/47A Expired GB646581A (en) | 1946-10-25 | 1947-10-22 | Improvements in or relating to direct-current voltage amplifiers |
Country Status (4)
Country | Link |
---|---|
US (1) | US2490727A (en) |
DE (1) | DE854959C (en) |
FR (1) | FR956050A (en) |
GB (1) | GB646581A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2795653A (en) * | 1953-11-12 | 1957-06-11 | Reeves Instrument Corp | Vacuum tube voltmeter amplifier circuit |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB644072A (en) * | 1947-10-07 | 1950-10-04 | Emi Ltd | Improvements relating to arrangements for selecting different signals in thermionic valve circuits |
US2685000A (en) * | 1949-04-29 | 1954-07-27 | Rca Corp | Stabilized direct current amplifier |
DE903698C (en) * | 1951-07-24 | 1954-02-08 | Siemens Ag | Input circuit for DC voltage amplifier |
Family Cites Families (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1820212A (en) * | 1929-11-07 | 1931-08-25 | Bauer Paul Sherman | Electric meter |
US1926568A (en) * | 1930-02-21 | 1933-09-12 | Stanolind Oil & Gas Co | Direct current amplifier and method of operating same |
US2043107A (en) * | 1933-05-20 | 1936-06-02 | Paul H Macneil | Direct current amplifier |
NL54228C (en) * | 1937-10-09 | |||
US2413788A (en) * | 1942-05-11 | 1947-01-07 | Gen Motors Corp | Amplifier for small voltages |
US2442298A (en) * | 1944-05-29 | 1948-05-25 | Gen Motors Corp | Modulated heat ray detector |
-
0
- FR FR956050D patent/FR956050A/fr not_active Expired
-
1947
- 1947-10-22 GB GB28294/47A patent/GB646581A/en not_active Expired
- 1947-12-06 US US790176A patent/US2490727A/en not_active Expired - Lifetime
-
1948
- 1948-11-04 DE DEP20539D patent/DE854959C/en not_active Expired
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2795653A (en) * | 1953-11-12 | 1957-06-11 | Reeves Instrument Corp | Vacuum tube voltmeter amplifier circuit |
Also Published As
Publication number | Publication date |
---|---|
US2490727A (en) | 1949-12-06 |
DE854959C (en) | 1952-11-10 |
FR956050A (en) | 1950-01-23 |
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