Am demodulator


Posted on Aug 6, 2012

Amplifying and limiting of the AM carrier is accomplished by the if gain block providing 55 dB of gain or higher with a limiting of 40 µ\. The limited carrier is then applied to the detector at the carrier ports to provide the desired switching function. The signal is then demodulated by the synchronous AM demodulator (1496) where the carrier frequency is attentuated due to the balanced nature of the device. Care must be taken not to overdrive the signal input so that distortion does not appear in the recorded audio.


Am demodulator
Click here to download the full size of the above Circuit.

Maximum conversion gain is reached when the carrier signals are in phase as indicated by the phase-gain relationship. Output filtering is also necessary to remove high frequency sum components of the carrier from the audio signal.




Leave Comment

characters left:

New Circuits

.

 


Popular Circuits

VHF - UHF band reciever
Razor-sharp CW filter
Sound-level-meter
Engineering
signal Can someone break down how this receiver works
ivrs final year project full description
40w no tune amp
Simple combination lock



Top