This circuit is a Oscillator with frequency stable, use a un MOSFET N- channel enhancement mode vertical D-MOS transistor (BS108), a Crystal quartz a 24MHz, is a Oscillator a low cost and stable frequency to the temperature. Util for applications AM and FM.
+8VDC +8VDC | | | | | / | \\100 | / | \\
+ / 10M | \ +------------/\/\/\--------+---------------o AC signal to
to draw. But guessing it seems as stable as any crystal oscillator. You also have to hope the Vgs of the transistor is pretty reproducable, so your output doesn't blow up the following stages with that low impedance and high 8V. It will consume all the power of the supply maybe 50mA and the low voltage never even reaches the TTL threshold of 0.8V. Then where do 8V come from, it is not a common supply voltage. With a single inverter gate you are better off.
if the resistance of 10R is replaced by an antenna that in the resonance frequency is of 10Z, we have a power of 0.1W(R.M.S) in the out. With another signal in Vgs is a mudulador of 0.1W(R.M.S). To greater power when coming out, greater reach of the trasmisor.
I don't understand what you want to say. Seems Portugues to me. If you replace the 10R with an antenna, you don't get any output, since the DC operating point will be wrong. You could use a transformer here, since you won't find a 10R antenna anyway. Your Xtal might also blow up without a series resistor. And modulation will not improve this either. Doubtful if it works at all.
I do not understand, can speak without animals, one talks about 0.1W (R.M.S) , sice system supported that maintained to power. In that context, it means the average power when reproducing a single tone, but it's not actually the RMS value of the power.
Example
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It would have to read but of Electronics that of kitchen.
It looks wrong to me. The 10M serves no purpose. The 3.3K/10K bias circuit values should be increased. There should be a capacitor from the gate of the MOSFET to ground.
If you want a stable oscillator, you want the impedances seen by the crystal to not depend on the parameters of the MOSFET. Every parameter of a MOSFET including the color changes with temperature.
You also want to keep the resistances either way more or way less than the impedances at the crystal. This prevents the resistances from lower the Q.
For stable frequency, you want the amplifier to have just enough gain to ensure starting and have the running gain reduced by the transistor going into cutoff. This makes the amplitude less stable than it could be but makes the frequency not depend on transistor characteristics as much.
For stable amplitude, you want the limiting to be in the form of bottoming of the transistor. Unfortunately, this makes the frequency depend more on how the transistor acts just as the drain voltage goes around zero volts and also lowers the Q because some of the energy in crystal is taken away by the transistor.
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