Multi-phase triangular wave synthesizer for phase-to-frequency c

Details Multi-phase triangular wave synthesizer for phase-to-frequency c Multi-phase triangular wave synthesizer for phase-to-frequency c

1996-05-09

1997-07-08

Bocure, Tesfaldet

Pulse or digital communications

Synchronizers

Phase displacement, slip or jitter correction

375374, H04L 700

Patent

active

056469675

ABSTRACT:
A triangular waveform synthesizer for a phase-to-frequency converter generates a saw tooth and triangular wave using both PDM and a DC modulation scheme. To minimize both delay and logic, while continuing to provide reasonable resolution, a 4-bit PDM and associated logic generates the PDM output waveform with polarity information and two switching waveforms that encode the DC level information to provide a resultant sum. The resulting waveform, after filtering, is the triangular waveform. Since the switching and adding of the DC levels occurs in real time, the actual delay for the resultant triangular wave is only that of the 4-bit PDM.

REFERENCES:
patent: 5056054 (1991-10-01), Wong et al.
patent: 5224125 (1993-06-01), Wong et al.

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