Apparatus for measuring low currents with high dynamics

Details Apparatus for measuring low currents with high dynamics Apparatus for measuring low currents with high dynamics

G - Physics

01

R

324/66

G01R 19/00 (2006.01) G01R 15/08 (2006.01)

Patent

CA 1265583

ABSTRACT OF THE DISCLOSURE An apparatus for measuring low currents with high dynamics, comprising in series: a multi-range preamplifier, a logarithmic amplification means, a thresholding means, an alarm means and a reading means, the preamplifier comprising in series: a first differential amplifier receiving at its inverting input the low current to be measured and a second amplifier, the first amplifier having a linear feedback chain of very high impedance and the second amplifier having a linear feedback chain of much lower impedence, a zero point adjustment means and a means for testing the gain of the apparatus being also provided on the first amplifier. Application more particularly to physics, biology, space research and radiation protection.

472399

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