Patent ID: 11860183
Assignee: TEXAS INSTRUMENTS INCORPORATED
Field: Measurement (Instruments)
Classification: CPC G | IPC G

Claim 6:
7. A watchdog circuit, comprising:
an integrator circuit configured to provide an output pulse in response to an input voltage exceeding a threshold;
a capacitor coupled in parallel with the integrator circuit, wherein the capacitor is coupled to a proportional to absolute temperature (PTAT) circuit and charged by a current provided by the PTAT circuit, and a voltage across the capacitor corresponds to the input voltage to the integrator circuit; and
temperature based acceleration current source circuitry coupled to the capacitor, wherein an acceleration current provided at an output of the temperature based acceleration current source circuitry charges the capacitor, and the temperature based acceleration current source circuitry is configured to selectively provide the acceleration current in response to an ambient temperature reaching a target.