ed">
sin(y &lt;= w + B sin y)
</pre>

<p>This is expanded by Tomisawa as:
</p>

<!-- LATEX \sum_{n=1}^{\infty}\frac{2}{nB}J_{n}(nB)\sin n\omega_{c}t -->

<img class="indented" src="pix/fmeq37.png" alt="feedback fm">

<p>As Tomisawa points out, this is very close to the other FM formulas, except that 
the argument to the Bessel function depends on the order, we have only multiples of the carrier frequency 
in the expansion, and the elements of the sequence are multiplied by 2/nB.  The result is a much 
broad