R
Rutger Stoots
- Jan 1, 1970
- 0
Hi,
I'm a software engineer and not really comfortable with electronics. May be
some of you could help me with the following problem.
A have an AM signal, the carrier is about 250 volt (ca 100 kHz) and the
modulated (digital) block wave (ca 1 kHz) is about 1 mVolt. That is an AM
index of about 1:250,000! I'd like to (under)sample it with an ADC and then
demodulate it (Hilbert transform). Because of the enourmous difference in
amplitudes it is not possible to do this in one go. So I'm looking for an
analogue way to enhance the modulation index before digitizing the signal.
Does anyone of you out there have a suggestion how to improve the modulation
index of an AM signal?
Rutger
I'm a software engineer and not really comfortable with electronics. May be
some of you could help me with the following problem.
A have an AM signal, the carrier is about 250 volt (ca 100 kHz) and the
modulated (digital) block wave (ca 1 kHz) is about 1 mVolt. That is an AM
index of about 1:250,000! I'd like to (under)sample it with an ADC and then
demodulate it (Hilbert transform). Because of the enourmous difference in
amplitudes it is not possible to do this in one go. So I'm looking for an
analogue way to enhance the modulation index before digitizing the signal.
Does anyone of you out there have a suggestion how to improve the modulation
index of an AM signal?
Rutger