Switching circuit for a detector array

An infrared detector array, comprising:

• (a) a plurality of pixels arranged into rows and columns;
• (b) a plurality of row conductors, a row conductor along each row of pixels;
• (c) a plurality of column conductors, a column conductor along each column of pixels;
• (d) a plurality of third conductors, a third conductor along each column;
• (e) each of said pixels including:
• i. a first capacitor formed by a conductive gate on an insulator layer on a semiconductor member with the semiconductor of bandgap less than the energy of the infrared photons to be detected and with said gate substantially transparent to said infrared photons;
• ii. a first switch connected between said gate and said row conductor for the pixel and with the control for said first switch connected to said column conductor for the pixel;
• (f) a voltage sensor for each of said row conductors;
• and
• (g) circuitry for detecting infrared photons in a pixel by cycles of (i) apply a voltage to said column conductor to close said first switch;
• (ii) apply a bias voltage to said row conductor to charge said first capacitor and thereby form a depletion region in said semiconductor member adjacent said gate, (iii) open said first switch to isolate said capacitor and collect photogenerated carriers in said depletion region, (iv) apply a voltage to said column conductor to close said first switch and sense the voltage on said capacitor by said voltage sensor on said row conductor, (v) apply a voltage to said column conductor to close said first switch and apply an empty voltage on said row conductor to discharge said capacitor.