am! modulator
I want to do a am modulator that "codes" my voice to a 40khz signal, I know to use an opamp to mix them, but what is good(simple, stable) way to generate to 40khz for the -pin on opamp,
in the schematic that i cnt find anymore it also used a (FET?) to switch the voice modulation on the + side, but didnt provide a part number, which fet would work for this?,
or what is a generic fet (when the arrow points towards the inside goin in on the base
also to output my signal I am using an h-bridge on my device, will i need to worry about the bridge keepin up to that fast frequency speed?