Method and apparatus for measuring pulses of charge

Details Method and apparatus for measuring pulses of charge Method and apparatus for measuring pulses of charge

1983-10-07

1986-02-11

Rubinson, Gene Z.

Facsimile and static presentation processing

Facsimile

Specific signal processing circuitry

330 9, H04N 514, H03F 134

Patent

active

045701830

ABSTRACT:
The present invention relates to a method and to apparatus for measuring electric charge, in particular for measuring small electric charges which are present in rapid succession, as happens under the effect of radiation, ionizing particles, or from piezo-electric means.
The apparatus comprises an amplifier (2) having high input impedance and a feedback network. The feedback network comprises at least one branch (24) connecting the output (6) of the amplifier (2) to an inverting input (21) thereof. Three switches (3,4,5) are so connected that either one of two of them (3,4) is capable of interrupting the transmission of an electrical signal via said at least one branch (24) of the feedback circuit. The portion of said branch (24) located between said switches includes electrical energy storing means (C.sub.2).

REFERENCES:
patent: 3590153 (1971-06-01), Minowa
patent: 4081793 (1978-03-01), Lohstroh
patent: 4298843 (1981-11-01), Nixon
patent: 4323798 (1982-04-01), Watkins
patent: 4453130 (1984-06-01), Bennett
patent: 4486783 (1984-12-01), Tanaka et al.
Understanding IC Operational Amplifiers, Melen et al., Howard W. Sams & C 1971, p. 10.

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