Abstract: A buck voltage regulator device comprises a coupled inductor, a high-side switch electrically connected between an electrical energy source and a primary winding of the coupled inductor, a first low-side switch electrically connected between the primary winding and a ground node, a second low-side switch electrically connected between an auxiliary winding of the coupled inductor and the ground node, a first output node electrically connected to the primary winding, a second output node electrically connected to the auxiliary winding, a first output storage capacitor electrically connected to the primary winding between the first output node and the ground node, and a second output storage capacitor electrically connected to the auxiliary winding and between the second output node and the ground node.

Abstract: A buck voltage regulator device comprises a coupled inductor, a high-side switch electrically connected between an electrical energy source and a primary winding of the coupled inductor, a first low-side switch electrically connected between the primary winding and a ground node, a second low-side switch electrically connected between an auxiliary winding of the coupled inductor and the ground node, a first output node electrically connected to the primary winding, a second output node electrically connected to the auxiliary winding, a first output storage capacitor electrically connected to the primary winding between the first output node and the ground node, and a second output storage capacitor electrically connected to the auxiliary winding and between the second output node and the ground node.

Abstract: A protection circuit includes a first resistive element configured for coupling to a protected circuit. The first resistive element has a particular resistance value. The protection circuit also includes a voltage regulator coupled to the first resistive element. The particular resistance value is selected to enable a magnitude of a bias current provided to the protected circuit to remain within a first operating current range associated with the protected circuit and to remain below a latchup holding current value associated with the protected circuit.

Abstract: A protection circuit includes a first resistive element configured for coupling to a protected circuit. The first resistive element has a particular resistance value. The protection circuit also includes a voltage regulator coupled to the first resistive element. The particular resistance value is selected to enable a magnitude of a bias current provided to the protected circuit to remain within a first operating current range associated with the protected circuit and to remain below a latchup holding current value associated with the protected circuit.

Abstract: A power factor correction circuit for a boost power supply, wherein the boost power supply includes a boost converter responsive to a rectified AC line voltage. According to one embodiment, the power factor correction circuit includes a voltage feedback amplifier having a first input terminal responsive to an output voltage of the boost converter, a switching multiplier circuit having a first input terminal connected to an output terminal of the voltage feedback amplifier and a second input terminal responsive to the rectified AC line voltage, a current feedback amplifier having a first input terminal connected to an output terminal of the switching multiplier circuit and having a second input terminal responsive to an input current of the boost converter, and a pulse width modulator control circuit having an input terminal connected to an output terminal of the current feedback amplifier and having an output terminal for connection to a pulse width modulated switch of the boost converter.

Abstract: A touchpad assembly and method for providing a signal to a computer indicative of the location and applied pressure of an object touching the touchpad assembly is provided. The touchpad assembly includes X and Y position and pressure sensitive semiconductor resistance sensor layers. The X and Y sensors have a pair of spaced apart X and Y conductive traces running across opposite ends such that a resistance RX connects the pair of X traces and a resistance RY connects the pair of Y traces. The X and Y sensors come into contact at a contact point when an object asserts a pressure on the touchpad. The contact point is connected to each trace by a variable pressure resistance RZ associated with the X and Y sensors and variable position resistances of the X and Y resistances. First and second pair of timing capacitors are connected to respective ones of the pairs of X and Y traces.

Abstract: A touchpad assembly and method for providing a signal to a computer indicative of the location and applied pressure of an object touching the touchpad assembly is provided. The touchpad assembly includes X and Y position and pressure sensitive semiconductor resistance sensor layers. The X and Y sensors have a pair of spaced apart X and Y conductive traces running across opposite ends such that a resistance RX connects the pair of X traces and a resistance RY connects the pair of Y traces. The X and Y sensors come into contact at a contact point when an object asserts a pressure on the touchpad. The contact point is connected to each trace by a variable pressure resistance RZ associated with the X and Y sensors and variable position resistances of the X and Y resistances. First and second pair of timing capacitors are connected to respective ones of the pairs of X and Y traces.

Abstract: A controller for controlling the frequency of an oscillator associated with establishing the switching frequency of a PWM power supply. Each one of a plurality of PWM power supplies are connected through a common bus to a bi-directional connection on the controller. The controller has an internal comparator which compares its associated oscillator frequency with the frequency on the common bus. If the frequency of its associated oscillator is lower than the frequency on the bus then the controller increases its associated oscillator frequency to the the bus frequency. If the frequency on the bus is less than the frequency of its associated oscillator then the controller elevates the bus frequency to its associated oscillator frequency. In this manner, the power supply associated with the oscillator having the highest frequency establishes the master frequency and all other oscillators are slaves. The controller can be either capacitively or DC coupled to its associated oscillator.

Abstract: This regulating system for an array of solar panels or the like consists of a tap connection into the array, and a boost switching regulator connected to the tapped array. The tap connection divides the array into first and second portions, and the switching regulator is connected so that its power-input terminals are across only one of the two portions of the array. The power-output terminals of the switching regulator are connected across the load (i.e., across the entire array), and the sensing or feedback terminals of the regulator receive a signal which acts as a measure of voltage or current at the load.Boost regulators do not dump overvoltage into a dissipative load; hence the invention prevents local heat generation and resulting spacecraft heat-balance problems of conventional dissipative regulators.

Abstract: A transformer-coupled two-inductor buck converter is provided which comprises a series input circuit including an input inductor, a capacitor and a grounded inductor. The input and grounded inductors are wound so that a source of d.c. input voltage can be connected across positive polarity outer ends thereof. A transformer is provided for coupled the input and output circuits of the converter. When a switching transistor in the input circuit turns on, input current conducting through the input inductor joins with current being dragged out of the grounded inductor and through the capacitor to conduct through the primary winding of the transformer and couple to the secondary winding for delivery as output current to the load. An output winding coupled to the grounded inductor is connected by a switching diode to the load.

Abstract: An uninterruptible power supply provides for input sinewaves of an AC utility to be separated by diode rectifiers to apply positive half sinewaves on a plus d.c. line and negative half sinewaves on a minus d.c. line. A battery-powered high-frequency inverter forming a part of the power supply includes a full wave diode rectifier for applying bursts of positive going pulses having sinusoidally varying duty cycles on a plus d.c. bus and bursts of negative going pulses having sinusoidally varying duty cycles on a minus d.c. bus. The plus d.c. line and the plus d.c. bus are joined and connected by a first synchronous switch to a common junction and the minus d.c. line and the minus d.c. bus are joined and connected by a second oppositely phased synchronous switch to the same common junction. The inverter is driven by bursts of pulses having sinusoidally varying duty cycles generated by comparing the amplitudes of feedback output half sinewave signals and reference half sinewave signals.

Abstract: A multiphase capacitor diode voltage multiplier for high power applications. A multiphase circuit comprising N strings of diode-capacitor arrays in M multiplier stages receives N alternating voltage inputs, each varying in phase, from a power stage. The multiphase multiplier circuit configuration enables current sharing among the N strings to reduce component stress.