G - Physics – 01 – R
Patent
G - Physics
01
R
358/21, 324/27
G01R 29/02 (2006.01) G01N 27/66 (2006.01)
Patent
CA 1065063
PATENT APPLICATION of RUSSELL STANLEY GUTOW, JR. and JOHN ROBERT FELTON for CIRCUIT FOR LINEARIZING THE RESPONSE OF AN ELECTRON CAPTURE DETECTOR Abstract of Disclosure A circuit improvement is disclosed for use in an electron capture detector of the type including an electron capture cell which is provided with polarization pulses to derive a cell current, a generator for varying the pulse rate to maintain the cell current constant, and a converter for converting the pulse frequency to an analog signal indicative of the concentration of an electron- capturing component. Pursuant to the improvement, the pulse rate is varied by an electrometer-amplifier for receiving the cell current and providing an output indicative of cell current departure from a reference current; an integrator for receiving the electrometer- amplifier output, the integrator generating a saw-tooth wave form, the slope of which is proportional to the magnitude of the electrometer-amplifier output signal; a signal comparator for comparing the integrator output signal with a fixed reference voltage and for generating a triggering pulse when the two are equal; and a pulse generator coupled to the comparator output for generating the polarization pulses in response to the triggering pulses.
272705
Felton John R.
Gutow Russell S. (jr.)
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