FR990139A - Amplificateur pour grandeurs physiques, électriques, mécaniques ou autres, variant lentement - Google Patents

Amplificateur pour grandeurs physiques, électriques, mécaniques ou autres, variant lentement

Info

Publication number
FR990139A
FR990139A FR990139DA FR990139A FR 990139 A FR990139 A FR 990139A FR 990139D A FR990139D A FR 990139DA FR 990139 A FR990139 A FR 990139A
Authority
FR
France
Prior art keywords
quantities
amplifier
physical
mechanical
electrical
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
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.)
Umicore NV SA
Original Assignee
Ateliers de Constructions Electriques de Charleroi SA
ACEC SA
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 Ateliers de Constructions Electriques de Charleroi SA, ACEC SA filed Critical Ateliers de Constructions Electriques de Charleroi SA
Application granted granted Critical
Publication of FR990139A publication Critical patent/FR990139A/fr
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
    • H03F3/38—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
    • A—HUMAN NECESSITIES
    • A45—HAND OR TRAVELLING ARTICLES
    • A45D—HAIRDRESSING OR SHAVING EQUIPMENT; EQUIPMENT FOR COSMETICS OR COSMETIC TREATMENTS, e.g. FOR MANICURING OR PEDICURING
    • A45D1/00—Curling-tongs, i.e. tongs for use when hot; Curling-irons, i.e. irons for use when hot; Accessories therefor
    • A45D1/02—Curling-tongs, i.e. tongs for use when hot; Curling-irons, i.e. irons for use when hot; Accessories therefor with means for internal heating, e.g. by liquid fuel
    • A45D1/04—Curling-tongs, i.e. tongs for use when hot; Curling-irons, i.e. irons for use when hot; Accessories therefor with means for internal heating, e.g. by liquid fuel by electricity
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03F—AMPLIFIERS
    • H03F3/00—Amplifiers with only discharge tubes or only semiconductor devices as amplifying elements
    • H03F3/66—Amplifiers simultaneously generating oscillations of one frequency and amplifying signals of another frequency

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
FR990139D 1944-03-06 1944-03-06 Amplificateur pour grandeurs physiques, électriques, mécaniques ou autres, variant lentement Expired FR990139A (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR990139T 1944-03-06

Publications (1)

Publication Number Publication Date
FR990139A true FR990139A (fr) 1951-09-18

Family

ID=9541673

Family Applications (1)

Application Number Title Priority Date Filing Date
FR990139D Expired FR990139A (fr) 1944-03-06 1944-03-06 Amplificateur pour grandeurs physiques, électriques, mécaniques ou autres, variant lentement

Country Status (2)

Country Link
BE (1) BE458298A (fr)
FR (1) FR990139A (fr)

Also Published As

Publication number Publication date
BE458298A (fr) 1945-04-30

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