GB646581A - Improvements in or relating to direct-current voltage amplifiers - Google Patents

Improvements in or relating to direct-current voltage amplifiers

Info

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
Application number
GB28294/47A
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Koninklijke Philips NV
Original Assignee
Philips Gloeilampenfabrieken NV
Philips Electronics NV
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Philips Gloeilampenfabrieken NV, Philips Electronics NV filed Critical Philips Gloeilampenfabrieken NV
Publication of GB646581A publication Critical patent/GB646581A/en
Expired legal-status Critical Current

Links

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.
GB28294/47A 1946-10-25 1947-10-22 Improvements in or relating to direct-current voltage amplifiers Expired GB646581A (en)

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)

* Cited by examiner, † Cited by third party
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)

* Cited by examiner, † Cited by third party
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)

* Cited by examiner, † Cited by third party
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

Cited By (1)

* Cited by examiner, † Cited by third party
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
FR956050A (en) 1950-01-23
DE854959C (en) 1952-11-10
US2490727A (en) 1949-12-06

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