Method and an electronic circuit for measuring very weak signals

Details Method and an electronic circuit for measuring very weak signals Method and an electronic circuit for measuring very weak signals

1985-03-26

1988-10-25

Eisenzopf, Reinhard J.

Electricity: measuring and testing

Measuring, testing, or sensing electricity, per se

With coupling means

324127, 324 96, G01R 1900, G01R 1508

Patent

active

047806680

ABSTRACT:
A method and an electronic circuit for measuring very weak signals at high voltage. The electronic circuit consists of a first portion (I) constituted by at least one amplifier (2) which is DC-connected directly to a source of weak signals. This amplifier is followed by at least one current amplifier (5). A second portion of the circuit (II) then transfers the amplified current signal from high potential to the ground potential of measuring apparatus by a series of transistors (12 to 14) followed by an output amplifier (22). An optional third portion (III) may be provided to sample the signal by an analog gate (25) suitably controlled from an external frequency source. This makes it possible in spectrometry to perform fast and accurate measurements on very weak signals at high potential.

REFERENCES:
patent: 3197702 (1965-07-01), Schweitzer, Jr.
patent: 3445814 (1969-05-01), Spalti
patent: 4070572 (1978-01-01), Summerhayes
patent: 4204152 (1980-05-01), Imrie
Siemens-Zeitschrift, vol. 48, No. 9, Sep. 1974, A. Hederen et al: "Missung von schnellveranderlichen Grossen auf hohem elektrischen Potential", pp. 591-596.
Control Instrumentaion, vol. 11, No. 2, Feb. 1979, R. Widlan: "New op--amp is capable of floating mode operation", p. 7.

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