Abstract: A pulse detection circuit, a method of operation and a fan assembly test circuit employing the same. In one embodiment, the pulse detection circuit includes a charge pump that receives an input signal and varies a charge in a charge storage device based on the input signal. The pulse detection circuit further includes a level detector, coupled to the charge pump, that compares a voltage across the charge storage device with first and second reference voltages, and a signaling circuit, coupled to the level detector, that generates an output signal based on the comparison and indicating an existence of the pulse. The pulse detection circuit may be a part of a fan assembly test circuit adapted to receive an input signal from a cooling fan under test.

Abstract: A filter scheme for a battery power plant for supplying power to a load includes positive and negative voltage bus bars each having an input and an output, the output adapted to be connected to the load. A capacitor is connected between the bus bars adjacent to the output of power plant, and an inductor is connected to either one of the bus bars adjacent to the output of the power plant to reduce bus voltage transients.

Abstract: An internal diode detection circuit for a device under test (DUT), a method of operating and a test fixture employing the same. In one embodiment, the internal diode detection circuit includes a source of electrical power that applies a reverse bias voltage to the DUT. The internal diode detection circuit also includes a current indicator, series-coupled to the DUT, that generates a signal when a current flows through the DUT. The signal indicates a presence of an internal diode in the DUT.