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FM modulator with discrete components

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FM modulator with discrete components

Postby productdesign » Tue Feb 05, 2013 10:48 am

Hi
I want to design an FM modulator with discrete components. The carrier frequency is 100KHz and the modualting signal frequency can be anything between 2.8KHz to 7.6KHz. There are some solutions available with varactor diodes. But the design details are not mentioned anywhere. The following are some of the circuits available.

http://www.neazoi.com/technology/varactordiodes.htm
http://www.neazoi.com/technology/varactors/trnsfig1.gif

Can anyone please suggest solution for this.
productdesign
 
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