Asynchronous digital threshold detector for a digital data stora

Details Asynchronous digital threshold detector for a digital data stora Asynchronous digital threshold detector for a digital data stora

1993-06-07

1994-05-24

Zazworsky, John

Communications: electrical

Digital comparator systems

307354, 328151, G05B 103, G06F 702, H03K 5153

Patent

active

053152840

ABSTRACT:
A zero-crossing detector for asynchronous detection of threshold transitions in a digitally sampled signal waveform. The Asynchronous Digital Threshold Detector (ADTD) receives a digitized self-clocking data readback waveform and provides the relative location of a zero-crossing within the sample period where it occurs. The digital output, which is useful for recovering data and clock signals, is in a digital form that can be used directly by a certain class of asynchronous digital phase detector systems. The ADTD is entirely digital and can be embodied in a low power configuration using CMOS technology.

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