Representative patents and related filings By James A. Crawford:   4,586,005 Enhanced Analog Phase Interpolation for Fractional-N Frequency Synthesis 4,668,992 Fast Phase-Lock Frequency Synthesizer 4,634,998 Fast Phase-Lock Frequency Synthesizer with Variable Sampling Efficiency 4,771,248 Fast Phase-Lock Frequency Synthesizer 4,810,904 Sample-and-Hold Phase Detector Circuit 5,282,227 Communication Signal Detection and Acquisition 5,796,783 Digital Transmission System 6,433,742 Diversity […]