| 摘要 |
<p>PATENT APPLICATION of RUSSELL STANLEY GUTOW, JR. and JOHN ROBERT FELTON for CIRCUIT FOR LINEARIZING THE RESPONSE OF AN ELECTRON CAPTURE DETECTOR 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 electroncapturing 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 electrometeramplifier 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.</p> |
