Abstract: A power supply with a programmable voltage slew rate is disclosed for generating a regulated voltage at a predetermined set-point. The power supply includes a programmable current source for generating a controllable level of current flow and a capacitive element coupled to the current source. The capacitive element is responsive to the current flow to establish a reference voltage that varies linearly with respect to variations in the current flow. The power supply additionally includes a power device having a control element disposed in sensed communication with the reference voltage and an output for driving a load. The output is operative to generate an output voltage following that of the reference voltage.

Abstract: A demand system is disclosed for controlling the output airflow from a pneumatic source in response to changes in airflow demand. The source includes a pressure sensitive bypass mechanism in fluid communication with a discharge manifold to divert unwanted airflow and a linear electronic limiter with a limiter signal input to control the pneumatic source and proportionally adjust output airflow into the discharge manifold. The demand system includes an airflow detector operative to produce a linear output signal proportional to the airflow through the bypass mechanism and a controller. The controller includes an input connected to the airflow detector and an output connected to the electronic limiter input and operative, as the airflow detector senses airflow through the bypass mechanism, to produce a linear output signal representative of the airflow to the limiter for altering the pneumatic source output.

Abstract: A current sharing apparatus for use in a power device system having a plurality of power devices disposed in parallel relationship. The power devices each include a programmable current source, a capacitive element coupled to the current source to generate a reference voltage, a power device configured to generate an output voltage following that of the reference voltage, and a slew rate controller. The controller has an input disposed in sensed communication with the output voltage to generate an error signal and control current from the current source. The current sharing apparatus includes a system output drawer connected to the respective power supply outputs to collect a total system output and a system output detector coupled to the system output drawer. The detector measures the total output through the drawer and is operative to generate a signal indicative of the total output and feed the signal to the respective slew rate controller inputs to further modify the error signals.