“World’s first” programmable receiver with jam avoidance
( 01 Jun 2008 )
Featuring what’s said to be the world’s first programmable receiver featuring jam avoidance, Micrel’s MICRF218, which is part of Micrels QwikRadio family, is targeted at garage door openers and tire pressure monitoring systems. This integrated ASK/OOK receiver with selectable IF bandwidth for 300 to 450MHz operation has the ability to escape from a jamming source and migrate to an alternate frequency. This is a crucial feature due to recent homeland security measures deploying a new mobile radio system. This radio system presents the possibility of jamming at the 390MHz frequency, a frequency also commonly used by garage door remote controls.
The MICRF218 can accommodate two reference crystals with the use of an external switch. It features a fully integrated IF section with built-in image rejection. The IF section has dual IF bandwidths that are externally selectable. In addition, a wide IF bandwidth can be chosen for backward compatibility with older transmitters that are LC-based.
