US Patents Issued to Carl R. Stevenson, WK3C

4,726,069 A multi-mode modulation and demodulation system and method
6,057,769 Intelligent alarm system with snow sensor
6,078,799 System and method for calibrating single sideband receiver reject image product
6,198,353 Phase locked loop having direct digital synthesizer dividers and improved phase detector
6,209,112 Apparatus and method for reducing power consumption of an error-correcting decoder
6,265,948 Image rejection in logic-based architecture for FSK modulation and demodulation
6,281,823 Direct digital synthesis using a sine weighted DAC
6,288,618 Logic-based architecture for FSK modulation and demodulation
6,650,721 Phase locked loop with numerically controlled oscillator divider in feedback loop
6,674,812 High IF frequencies with a lower frequency logic based FSK modulation selecting a harmonic alias and demodulation using sub-sampling techniques
6,721,372 Intelligent software controlled correction of frequency tracking for a local oscillator of a receiver of a wireless device
6,724,272 Method of temperature calibrating a numerically controlled oscillator using low tolerance master crystals.