RSSI AUTOMATIC TUNED PAGER
Original Publication Date: 1990-Oct-01
Included in the Prior Art Database: 2001-Nov-22
This invention allows a pager to automatically peak tune itself using an RSSI (received signal strength indicator) incorporated within the IF integrated circuit, A final IF integrated circuit with RSSI circuitry is used to detect the received strength of an externally generated RF signal. Under the control of a microprocessor or custom IC, the resonators in a voltage tuned RF preselector are systematically tuned (via D/A converters) to provide maximum or mimimum detected power at the RSSI as required by the filter tuning criteria. When tuning is complete, the D/A settings that arrived at are stored in the pager in a non- volatile memory (e.g. EEPROM).