Radiant energy – Photocells; circuits and apparatus – Photocell controlled circuit
Patent
1992-07-24
1993-05-25
Nelms, David C.
Radiant energy
Photocells; circuits and apparatus
Photocell controlled circuit
358228, H01J 4014
Patent
active
052142744
ABSTRACT:
A wide dynamic range sensor employing simple sensing circuitry formed on a single chip provides accurate measurements of an incoming signal capable of varying of a wide dynamic range. Responsive to an incoming signal, the sensor generates output pulses having a frequency which is representative of a property of the incoming signal. By measuring the output pulse frequency, an accurate indication of a property of the incoming signal capable of varying over a range of 10.sup.5 or more is possible over the entire signal range. A plurality of sensors can be colocated on a single chip for providing a wide dynamic range sensor array.
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Le Que T.
Nelms David C.
President and Fellows of Harvard College
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