Patent ID: 9618635
Date: 2017-04-11
CPC Classifications: G01J,G01T,H01L

Claim:
1. A device comprising: an oscillator comprising a radiation-sensitive cell and a comparator, wherein the radiation-sensitive cell is configured to apply a resistance, and the comparator is configured to receive an input signal based at least in part on the resistance applied by the radiation-sensitive cell, and to deliver an output signal via an oscillator output terminal at intervals defined by an oscillation frequency; and a counter, connected to the oscillator output terminal and configured to count a number of times the comparator delivers the output signal from the oscillator; wherein the resistance applied by the radiation-sensitive cell is configured to vary in response to incident radiation, and the oscillator is configured for the oscillation frequency to vary based at least in part on the resistance of the radiation-sensitive cell; wherein the radiation-sensitive cell comprises a single-polysilicon EEPROM cell formed with a standard CMOS process, wherein the single-polysilicon EEPROM cell comprises a control capacitor, a tunneling capacitor, a floating gate transistor, and a floating gate positioned between the tunneling capacitor and the floating gate transistor.