A Novel High-Dynamic-Range PLL System for Synchronous Detection in AM Receivers
- 1 August 1985
- journal article
- Published by Institute of Electrical and Electronics Engineers (IEEE) in IEEE Transactions on Consumer Electronics
- Vol. CE-31 (3) , 447-455
- https://doi.org/10.1109/TCE.1985.289958
Abstract
This paper presents a novel nested phase-lock loop system for synchronous detection in AM radio receivers with frequency-synthesizer tuning. The VCXO of the phase-lock loop simultaneously acts as the reference frequency for the synthesizer. A unique compensation technique that ties the poles of the PLL transfer function down in fixed positions effectuates an extremely high dynamic range, thereby alleviating the i. f. filter requirements drastically. With a loop bandwidth of 3.5Hz, an interfering carrier with a 50dB higher level and at a distance of 9kHz from the desired carrier is adequately rejected.Keywords
This publication has 2 references indexed in Scilit:
- A New Integrated High-Performence AM Receiver for Car RadioIEEE Transactions on Consumer Electronics, 1984
- Synchronous CommunicationsProceedings of the IRE, 1956