FR1454150A - Amplification de signaux en courant continu de niveaux très faibles - Google Patents

Amplification de signaux en courant continu de niveaux très faibles

Info

Publication number
FR1454150A
FR1454150A FR37424A FR37424A FR1454150A FR 1454150 A FR1454150 A FR 1454150A FR 37424 A FR37424 A FR 37424A FR 37424 A FR37424 A FR 37424A FR 1454150 A FR1454150 A FR 1454150A
Authority
FR
France
Prior art keywords
amplification
signals
low levels
levels
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
Application number
FR37424A
Other languages
English (en)
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.)
Keithley Instruments LLC
Original Assignee
Keithley Instruments LLC
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 Keithley Instruments LLC filed Critical Keithley Instruments LLC
Application granted granted Critical
Publication of FR1454150A publication Critical patent/FR1454150A/fr
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R19/00—Arrangements for measuring currents or voltages or for indicating presence or sign thereof
    • G01R19/18—Arrangements for measuring currents or voltages or for indicating presence or sign thereof using conversion of DC into AC, e.g. with choppers
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03F—AMPLIFIERS
    • H03F3/00—Amplifiers with only discharge tubes or only semiconductor devices as amplifying elements
    • H03F3/38—DC amplifiers with modulator at input and demodulator at output; Modulators or demodulators specially adapted for use in such amplifiers
    • H03F3/40—DC amplifiers with modulator at input and demodulator at output; Modulators or demodulators specially adapted for use in such amplifiers with tubes only

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Amplifiers (AREA)
  • Amplitude Modulation (AREA)
FR37424A 1964-11-12 1965-11-05 Amplification de signaux en courant continu de niveaux très faibles Expired FR1454150A (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US41080364A 1964-11-12 1964-11-12

Publications (1)

Publication Number Publication Date
FR1454150A true FR1454150A (fr) 1966-07-22

Family

ID=23626287

Family Applications (1)

Application Number Title Priority Date Filing Date
FR37424A Expired FR1454150A (fr) 1964-11-12 1965-11-05 Amplification de signaux en courant continu de niveaux très faibles

Country Status (4)

Country Link
US (1) US3424981A (fr)
DE (1) DE1437733A1 (fr)
FR (1) FR1454150A (fr)
GB (1) GB1057513A (fr)

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3515975A (en) * 1968-06-28 1970-06-02 Westinghouse Electric Corp Current to voltage transducer
US3691470A (en) * 1971-03-10 1972-09-12 Keithley Instruments Chopper amplifier
US3735274A (en) * 1971-08-10 1973-05-22 Gen Motors Corp Thermocouple signal amplifier
US4292633A (en) * 1978-11-24 1981-09-29 Robertshaw Controls Company Two-wire isolated signal transmitter
NL7904923A (nl) * 1979-06-25 1980-12-30 Philips Nv Microfonie compensatie voor gasionisatie detektor.
DE3307693A1 (de) * 1983-03-04 1984-09-13 Jacques J. Dipl.-Ing. Zürich Troesch Verfahren zur automatischen eingangsstrom-kompensation an einem serie-parallel gegengekoppelten messverstaerkerkreis, hoechstohmiges, eingangsstromkompensiertes verstaerkermodul sowie verwendung des verfahrens
US4628256A (en) * 1983-06-27 1986-12-09 Weinschel Engineering Co., Inc. Thermocouple power meter
US4837518A (en) * 1987-08-18 1989-06-06 Atlantic Richfield Company Method and apparatus for measuring the electrical resistivity of geologic formations through metal drill pipe or casing
US4977366A (en) * 1988-10-07 1990-12-11 Lucas Weinschel Inc. High frequency power sensing device
US4902981A (en) * 1988-12-09 1990-02-20 Atlantic Richfield Company Well casing potential measurement tool with compensated DC errors
IL297747A (en) 2020-04-28 2022-12-01 Lake Shore Cryotronics Inc Integrated measurement systems and methods for precise synchronous measurement of materials

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL54228C (fr) * 1937-10-09
US2372062A (en) * 1941-01-06 1945-03-20 Dorsman Cornelis Device for measuring low direct voltages
US2942188A (en) * 1954-04-30 1960-06-21 Tung Sol Electric Inc Discriminator circuit
US3101446A (en) * 1960-09-02 1963-08-20 Itt Signal to noise ratio indicator
US3173096A (en) * 1962-05-02 1965-03-09 Beckman Instruments Inc Clamping circuits for limiting the output of an amplifier

Also Published As

Publication number Publication date
GB1057513A (en) 1967-02-01
DE1437733A1 (de) 1969-11-20
US3424981A (en) 1969-01-28

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