On Fri, 21 Apr 2006 21:54:39 GMT, Telamon
wrote:

In article ng22g.739$5z3.735@trndny01, HFguy
wrote:

Are you sure about the patent cost? I thought sync detection was mostly
implemented through a PLL type circuit. You can buy this circuit on a
chip with a handful of support components for it to function. Maybe you
have to add a reference oscillator to the circuit with the other support
components. Anyone should be able to buy and use these designs.

A PLL and a Product Detector