Radiation detector circuit having a 1-bit quantized output

Details Radiation detector circuit having a 1-bit quantized output Radiation detector circuit having a 1-bit quantized output

1988-02-23

1995-10-17

Buczinski, Stephen C.

Radiant energy

Invisible radiant energy responsive electric signalling

Infrared responsive

250332, 250334, 2503381, 2505781, 348164, 348242, G01J 100, G01J 500, H01J 4014

Patent

active

054593190

ABSTRACT:
Radiation detectors are mounted in an optic focal plane of an infrared radiation sensor system. The radiation detectors produce output signals indicating detected radiation. The output signals are sampled by a sample-and-hold circuit and passed to a 1-bit comparator. The comparator produces a 1-bit signal at a high voltage level for samples of the output signal that are greater than a reference voltage and at a low voltage level for samples of the output signal that are less than the reference voltage. In this manner, the comparator reduces the effects of any gamma spikes on the measurement of intensity of radiation. The 1-bit signal is less susceptible to effects of interference than analog signals in conventional systems and the 1-bit comparator produces this 1-bit signal without consuming a great deal of electrical power. A multiplexor carries such 1-bit signals from the focal plane to a processor over less wires than in conventional systems. The processor receives and integrates the 1-bit signals and produces an output that indicates intensity and angle of detected radiation.

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"The Technological Requirements for Application Specific Integrated Circuits"; R. W. Broderson; IEEE, 1985; pp. 13-16.
"MOS.ADC-Filter Combination That Does Not Require Precision Analog Components"; M. S. Hauser, et al.; ISSC Conference; Feb. 13, 1985.

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