Abstract: In some embodiments, a circuit includes a reference current source to provide a substantially noise free current signal, and a detector coupled to one or two power supplies. In some embodiments, a method includes receiving a substantially noise free current signal, receiving one or two power supply signals, processing the substantially noise free current signal and the one or two power supply signals to detect a noise signal in the one or two power supply signals, and generating a noise detection signal in response to detection of the noise signal.

Abstract: An improved interpolator includes a replica delay line and an interpolated delay edge generator. The replica delay line provides two replica delay edges to the interpolated delay edge generator. The interpolated delay edge generator selectively generates an interpolated delay edge while maintaining a substantially constant capacitive loading on the two replica delay edges. The replica delay line may comprise a delay cell of four current-starved inverter delay stages or four capacitor-loaded inverter delay stages.

Abstract: An improved interpolator includes a replica delay line and an interpolated delay edge generator. The replica delay line provides two replica delay edges to the interpolated delay edge generator. The interpolated delay edge generator selectively generates an interpolated delay edge while maintaining a substantially constant capacitive loading on the two replica delay edges. The replica delay line may comprise a delay cell of four current-stared inverter delay stages or four capacitor-loaded inverter delay stages.

Abstract: An improved interpolator includes a replica delay line and an interpolated delay edge generator. The replica delay line provides two replica delay edges to the interpolated delay edge generator. The interpolated delay edge generator selectively generates an interpolated delay edge while maintaining a substantially constant capacitive loading on the two replica delay edges. The replica delay line may comprise a delay cell of four current-starved inverter delay stages or four capacitor-loaded inverter delay stages.

Abstract: In some embodiments, a circuit includes a reference current source to provide a substantially noise free current signal, and a detector coupled to one or two power supplies. In some embodiments, a method includes receiving a substantially noise free current signal, receiving one or two power supply signals, processing the substantially noise free current signal and the one or two power supply signals to detect a noise signal in the one or two power supply signals, and generating a noise detection signal in response to detection of the noise signal.

Abstract: An improved interpolator includes a replica delay line and an interpolated delay edge generator. The replica delay line provides two replica delay edges to the interpolated delay edge generator. The interpolated delay edge generator selectively generates an interpolated delay edge while maintaining a substantially constant capacitive loading on the two replica delay edges. The replica delay line may comprise a delay cell of four current-starved inverter delay stages or four capacitor-loaded inverter delay stages.

Abstract: Various apparatuses and methods are described that include a variable-impedance matched termination pair coupled to differential signaling bus pair. In an embodiment, the differential signaling bus pair includes a first bus and a second bus. The variable-impedance matched termination pair includes a first variable-impedance component and a second variable-impedance component. The impedance value of each variable-impedance component depends on the voltage level sensed by that variable-impedance component. The first variable-impedance component couples to the first bus. The second variable-impedance component couples to the second bus. The first variable-impedance component is electrically isolated from the second variable-impedance resistor.

Abstract: A bi-directional communication system includes a driver capable of controlling a slew rate of transmitted data signals. Impedance matching can be provided to match an impedance of a driver circuit to an impedance of a communication line. The impedance is maintained constant as data is driven from the data driver. The data receiver circuit can adjust a reference voltage in response to simultaneously transmitted data. The slew rate of the receiver circuit trip point is controlled to maintain adequate noise margin during operation. Both the receiver and driver circuits can be controlled using a delay line circuit.

Abstract: Various apparatuses and methods are described that include a variable-impedance matched termination pair coupled to differential signaling bus pair. In an embodiment, the differential signaling bus pair includes a first bus and a second bus. The variable-impedance matched termination pair includes a first variable-impedance component and a second variable-impedance component. The impedance value of each variable-impedance component depends on the voltage level sensed by that variable-impedance component. The first variable-impedance component couples to the first bus. The second variable-impedance component couples to the second bus. The first variable-impedance component is electrically isolated from the second variable-impedance resistor.

Abstract: A bi-directional communication system includes a driver capable of controlling a slew rate of transmitted data signals. Impedance matching can be provided to match an impedance of a driver circuit to an impedance of a communication line. The impedance is maintained constant as data is driven from the data driver. The data receiver circuit can adjust a reference voltage in response to simultaneously transmitted data. The slew rate of the receiver circuit trip point is controlled to maintain adequate noise margin during operation. Both the receiver and driver circuits can be controlled using a delay line circuit.

Abstract: A bi-directional communication system includes a driver capable of controlling a slew rate of transmitted data signals. Impedance matching can be provided to match an impedance of a driver circuit to an impedance of a communication line. The impedance is maintained constant as data is driven from the data driver. The data receiver circuit can adjust a reference voltage in response to simultaneously transmitted data. The slew rate of the receiver circuit trip point is controlled to maintain adequate noise margin during operation. Both the receiver and driver circuits can be controlled using a delay line circuit.