Abstract: Briefly, in accordance with one embodiment of the invention, a method of performing high speed signaling includes the following. A preamble signal and an end of packet (EOP) signal are transmitted at a low frequency using rail-to-rail voltage signal levels. Later, high frequency signaling is transmitted using a voltage signal level swing that is less than rail-to-rail.

Abstract: Briefly, in accordance with one embodiment of the invention, a method of performing high speed signaling includes the following. A preamble signal and an end of packet (EOP) signal are transmitted at a low frequency using rail-to-rail voltage signal levels. Later, high frequency signaling is transmitted using a voltage signal level swing that is less than rail-to-rail.

Abstract: Briefly, in accordance with one embodiment of the invention, a method of performing high speed signaling includes the following. A preamble signal and an end of packet (EOP) signal are transmitted at a low frequency using rail-to-rail voltage signal levels. Later, high frequency signaling is transmitted using a voltage signal level swing that is less than rail-to-rail.

Abstract: Briefly, in accordance with one embodiment of the invention, a driver includes: a plurality of transistors and two substantially equal impedances coupled so as to provide a relatively constant source output impedance during switching of a selected subset of transistors of the plurality. The plurality further provides the relatively constant source output impedance at each of two states of the driver output signal. In accordance with anther embodiment, a signaling circuit includes a circuit configuration including the capability to provide high speed, small swing voltage signaling and low speed, rail-to-rail voltage signaling. The circuit configuration is coupled to provide a substantially constant output impedance during high-speed signaling. In accordance with anther embodiment, a method of operating a dual mode circuit providing a substantially constant output impedance in a first operational mode of high speed, limited voltage swing signaling.

Abstract: A line current measuring arrangement employs a single toroidal core with line windings, control windings, and a sense winding. The line windings cause an amount and polarity of magnetizing intensity H in the core when a line current flows. The control windings are pulsed by control current pulses to cause successively equal changes of opposite polarity of control H in the core to drive the core to successively opposite polarities of B saturation. The sense winding is arranged so that successive changes of B cause successive sense voltage pulses of opposite polarity. Successive sense voltage pulses are of different amplitude only if a line current is flowing to cause an amount of line H in the core. Successive voltage pulses are cumulatively and algebraically integrated to provide a changing output voltage which is a measure of the cumulative integration. The output voltage causes feedback H in the core in opposition to any line H.