Abstract: Systems, methods, and circuitries are provided for calibrating a heater used to heat an adjustable resistance network during a trimming procedure. In one example, a circuit is provided that includes an adjustable resistance network including first resistance segments; a heater element thermally coupled to the adjustable resistance network; a calibration resistor including second resistance segments thermally coupled to the first resistance segments; and interface circuitry coupled to the calibration resistor.

Abstract: Systems, methods, and circuitries are provided for calibrating a heater used to heat an adjustable resistance network during a trimming procedure. In one example, a circuit is provided that includes an adjustable resistance network including first resistance segments; a heater element thermally coupled to the adjustable resistance network; a calibration resistor including second resistance segments thermally coupled to the first resistance segments; and interface circuitry coupled to the calibration resistor.

Abstract: In examples, a circuit comprises a first current source coupled to a voltage source node. The circuit comprises a resistor having a first resistor terminal and a second resistor terminal, where the first resistor terminal is coupled to the first current source. The circuit comprises a bipolar transistor having a base, a collector, and an emitter, with the base coupled to the first resistor terminal, the emitter coupled to the second resistor terminal, and the collector coupled to the voltage source node. The circuit comprises a second current source coupled to the emitter and the second resistor terminal, with the second current source coupled to a ground node. The circuit comprises a Schmitt trigger having an input coupled to the emitter, the second resistor terminal, and the second current source.

Abstract: A multi-dimensional holomorphic embedding method for voltage control of an AC power system includes embedding multiple independent symbolic variables representing multiple control elements of the AC power system into AC power flow equations that describe the AC power system, analytically solving voltages for targeted buses of the AC power system in a form of multivariate power series or multivariable Padé approximants about the multiple independent symbolic variables such that coefficients of the multivariate power series or multivariable Padé approximants are obtained non-iteratively, and jointly adjusting the multiple control elements according to the multivariate power series or multivariable Padé approximants to control voltages of the targeted buses.

Abstract: Systems, methods, and circuitries are provided for calibrating a heater used to heat an adjustable resistance network during a trimming procedure. In one example, a circuit is provided that includes an adjustable resistance network including first resistance segments; a heater element thermally coupled to the adjustable resistance network; a calibration resistor including second resistance segments thermally coupled to the first resistance segments; and interface circuitry coupled to the calibration resistor.

Abstract: A multi-dimensional holomorphic embedding method for voltage control of an AC power system includes embedding multiple independent symbolic variables representing multiple control elements of the AC power system into AC power flow equations that describe the AC power system, analytically solving voltages for targeted buses of the AC power system in a form of multivariate power series or multivariable Padé approximants about the multiple independent symbolic variables such that coefficients of the multivariate power series or multivariable Padé approximants are obtained non-iteratively, and jointly adjusting the multiple control elements according to the multivariate power series or multivariable Padé approximants to control voltages of the targeted buses.