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RF/Microwave  

Optimise FM transmission with digital PLLs

Posted: 14 Aug 2007     Print Version  Bookmark and Share

Keywords:FM transmitter  digital PLL  on-chip crystal oscillator; MPX signal  KT0801 

There are three drawbacks associated to a pure analogue FM solution. It necessitates the use of many external components that require tuning and calibration before usage; the limits on precision of analogue amplifier performance impacts stereo separation performance; and SNR improvement comes with the penalty of power and area.

This article describes a digital PLL and DSP-based FM transmitter architecture that overcomes these issues.

Get the full article as a PDF document.




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