Abstract: Pulse width modulated controller systems. Implementations may include: a microcontroller coupled with a memory, a switch controller coupled with the microcontroller, and a calibration unit. The calibration unit may include one or more comparators, one or more passive electrical components, and an encoder logic all operatively coupled together and coupled with the microcontroller and with the switch controller where the at least one comparator and the one or more passive electrical components are electrically coupled with a supply voltage to the semiconductor switch and with a load voltage (output voltage) from the semiconductor switch.

Abstract: Pulse width modulated controller systems. Implementations may include: a microcontroller coupled with a memory, a switch controller coupled with the microcontroller, and a calibration unit. The calibration unit may include one or more comparators, one or more passive electrical components, and an encoder logic all operatively coupled together and coupled with the microcontroller and with the switch controller where the at least one comparator and the one or more passive electrical components are electrically coupled with a supply voltage to the semiconductor switch and with a load voltage (output voltage) from the semiconductor switch.

Abstract: A power conversion circuit and method of formation is provided, which in one embodiment includes a transistor, a driver circuit having an output connected to a control electrode of the transistor and having a bootstrap port configured to be connected to a first terminal of a capacitor; a switch circuit having a first port connected to a current carrying electrode of the transistor and having a ground port connected to a ground, a capacitor port configured to be connected to a second of the capacitor, a first switch configuration in which the capacitor port is connected to the first port, and a second switch configuration in which the capacitor port is connected to the ground port.

Abstract: A power conversion circuit and method of formation is provided, which in one embodiment includes a transistor, a driver circuit having an output connected to a control electrode of the transistor and having a bootstrap port configured to be connected to a first terminal of a capacitor; a switch circuit having a first port connected to a current carrying electrode of the transistor and having a ground port connected to a ground, a capacitor port configured to be connected to a second of the capacitor, a first switch configuration in which the capacitor port is connected to the first port, and a second switch configuration in which the capacitor port is connected to the ground port.

Abstract: A hysteresis generator for providing a comparator with a precision hysteresis reference input. An output of the comparator controls a switch which determines whether or not a reference current is applied to a resistor. The resistor is connected between a reference voltage and an input to the comparator. A buffer amplifier provides the reference voltage to the resistor. The reference current is taken from a second resistor connected between the output of the buffer amplifier and the input of a current mirror. The current mirror applies its output current to the first resistor. A diode may be inserted between the output of the buffer amplifier and the first resistor to make the hysteresis voltage generated by the current applied to the first resistor substantially temperature independent.

Abstract: A negative input voltage comparator that compares a negative input voltage signal against a positive voltage signal in a circuit, such as an integrated circuit. The negative input voltage signal is effectively isolated from the circuit by means of a series resistor in the base-emitter circuit of a transistor which is connected in the output leg of a current comparator.

Abstract: A solid state starting system for electric motors having main and auxiliary windings of the capacitor start induction run and capacitor start-capacitor run types uses a triac serially connected to the auxiliary winding. The system differentially measures the auxiliary winding voltage and provides a triac gate signal when in the START mode. When the auxiliary voltage reaches a calibratable cut-out voltage the triac is disabled until the auxiliary winding voltage decreases to a level below a calibratable cut-in voltage. The slope of the percent motor speed cut-out versus percent line voltage is calibratable to permit compensation for variations in line voltage. The triac can be directly driven or driven through an optically coupled interface having a triac output (OCI).