Patent ID: 9535446
Date: 2017-01-03
CPC Classifications: G05F

Claim:
1. A method for adjusting a bandgap circuit output voltage, comprising: in a first stage, while temperature of the bandgap circuit is increased using a thermal energy source external to the bandgap circuit: (1) applying the thermal energy to the bandgap circuit to cause increasing temperature; (2) measuring the bandgap circuit output voltage; and (3) if the bandgap circuit output voltage does not remain constant, adjusting, while the temperature of the bandgap circuit is continuously increasing, a temperature dependent source of the bandgap circuit to generate a constant output voltage; in a second stage after the bandgap circuit output voltage remains constant: (1) applying a constant thermal input power to the bandgap circuit; and (2) adjusting gain of a linear impedance device of the bandgap circuit to generate an output voltage at a predetermined voltage level.