Miscellaneous active electrical nonlinear devices – circuits – and – Signal converting – shaping – or generating – Clock or pulse waveform generating
Patent
1997-08-18
1999-11-23
Wambach, Margaret R.
Miscellaneous active electrical nonlinear devices, circuits, and
Signal converting, shaping, or generating
Clock or pulse waveform generating
327262, 327268, 327271, 327295, 331 55, H03K 104
Patent
active
059907215
ABSTRACT:
A clock for digital devices. Ordinarily, when multiple digital devices are clocked by a common clock, the clock signals frequently arrive at the digital devices at different times, due to propagation delays. The devices are thus not clocked synchronously. Under the invention, the multiple devices are connected to a common transmission line. A standing wave is generated on the transmission line, and the periodic collapse of the standing wave is used to clock the devices. Synchronous clocking to within about 1.0 nano-seconds has been attained, in a transmission line about ten feet long, wherein a clock signal ordinarily takes about 15 nanoseconds to travel from one end to the other.
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NCR Corporation
Wambach Margaret R.
Welte Gregory A.
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