Designing An AM Receiver For Low Power Wireless Systems Using The NEC UPC2768GR IC

A wide variety of low power wireless communication systems have surfaced in recent years. Automotive keyless entry, home security, bar code readers, and child monitors are just a few of the many applications for this technology. Most low power wireless systems transmit less than 1mW of power and operate in the FCC PART 15 band (260-470 MHz) where licensing is not required at such low power levels. Operating range varies from just a few feet (bar code readers) to a few hundred feet (garage door openers) depending on the application. Naturally, many of these systems must be lightweight and battery driven to meet portability requirements. Most importantly, however, cost must be highly competitive to survive in demanding commercial markets.