Patent ID: 9599517
Date: 2017-03-21
CPC Classifications: G01K

Claim:
1. A circuit, comprising: sensing circuitry including at least one sensing element configured to output at least one temperature-dependent voltage; a compare circuit configured to generate at least one intermediate voltage in response to comparing the at least one temperature-dependent voltage to a feedback voltage; a control circuit configured to generate at least one control signal in response to the intermediate voltage; and a switching circuit configured to couple a capacitor coupled to a feedback node to one of a first voltage supply and a second voltage supply in response to the at least one control signal to generate an output signal having a pulse width that is based on a temperature sensed by the sensing circuitry, wherein one of the at least one sensing element is disposed on a first layer of a three-dimensional integrated circuit, and wherein the compare circuit, the control circuit, and the switching circuit are disposed on a second layer of the three-dimensional integrated circuit.