Hi.
I'm trying to make an AM radio receiver circuit.
So I have my antenna connected to a tank and then an envelope detector like so (sorry I forgot the resistor/capacitor in parallel after the diode)
When I put my oscilloscope to see the output signal I see a bunch of noise. With or without the resistor/capacitor in parallel, the signal goes into the negative region, which it should not.
Why is this? I figured that the signal must be amplified before the diode because of the forward voltage of the diode.
Is this true? If so, do I put the amplifier in between the detector and tank circuit? Are there any good rf amplifier circuits that you can aware me of?
Thanks for the help.
I'm trying to make an AM radio receiver circuit.
So I have my antenna connected to a tank and then an envelope detector like so (sorry I forgot the resistor/capacitor in parallel after the diode)
When I put my oscilloscope to see the output signal I see a bunch of noise. With or without the resistor/capacitor in parallel, the signal goes into the negative region, which it should not.
Why is this? I figured that the signal must be amplified before the diode because of the forward voltage of the diode.
Is this true? If so, do I put the amplifier in between the detector and tank circuit? Are there any good rf amplifier circuits that you can aware me of?
Thanks for the help.