Abstract: Circuitry includes a multiplexer to output first data and second data in response to a clock signal, the clock signal having rising and falling clock edges, where the multiplexer outputs first data at a rising clock edge and outputs second data at a falling clock edge. The circuitry includes a DAC to receive the first data and the second data and to generate, therefrom, complementary first and second signals, a filter to filter the complementary first signals and second signals and thereby produce first and second filtered signals, and a voltmeter to measure a difference between the first and second filtered signals, the difference corresponding to a duty cycle error in the clock signal.

Abstract: Apparatus that provides an output voltage to a device under test (DUT) includes a reference waveform generator to provide a waveform having a predefined swing, where the waveform is an analog signal that is based on data, a digital-to-analog converter (DAC) to receive the waveform, to scale the waveform using a scaling factor to produce a scaled waveform, and to generate a current that corresponds to the scaled waveform, and a resistive circuit connected to a circuit path that leads to the DUT. The current passing through the resistive circuit produces a voltage drop. The output voltage is based, at least in part, on the voltage drop.

Abstract: An apparatus to compensate for loss in a transmission path includes a circuit block that incorporates time constants into a signal transmitted via the transmission path. The time constants counteract at least part of inherent time constants that contribute to loss in the transmission path. The circuit block includes a resistive circuit and a capacitive circuit. The capacitive circuit and the resistive circuit together contribute to the time constants. The capacitive circuit includes plural capacitors that are each switchable via the circuit block. An amount of compensation provided by the apparatus corresponds, at least in part, to the loss in the transmission path.