* Mixing with a diode and LC resonance circuit
* Demodulator with full wave precision rectifier
* Receiver cut off frequency @ 1 kHz (2nd order butterworth)
Credits:
Thank you @hurz for providing a much improved mixer circuit. Link below.
http://everycircuit.com/circuit/6159942510968832
Texas Instruments
Precision Full-Wave Rectifier
Notes:
To be able to see the interresting stuff, the "carrier" frequency of 20 kHz is very close to the modulation frequency 1 kHz. This is not a desired case in real life, but I believe it works in the example.
The output of a demodulated AM signal, opposite that of a demodulated FM signal, varies with the amplitude of the received signal. Try adjusting the potmeter.
My other designs:
Colpitts Oscillators
http://everycircuit.com/circuit/6472095956729856
Binary LC Filter Bank Oscillator
http://everycircuit.com/circuit/5849640909144064
LC Filter Bank Oscillator
http://everycircuit.com/circuit/6141020952854528
RF Up and Down Mixing
http://everycircuit.com/circuit/6321309163454464
DC Motor Rev. Sliding Mode Controller
http://everycircuit.com/circuit/5398415189213184
DC Motor Revolution Detector
http://everycircuit.com/circuit/6753368923176960
Boost SMPS Unlimited Voltage Build Up
http://everycircuit.com/circuit/6448454909034496
High Power Charge Pump w. Mosfets
http://everycircuit.com/circuit/5016778832084992
Transformerless 230 Vac to 10 Vdc
http://everycircuit.com/circuit/4981362800197632
Motor Revolution Controller
http://everycircuit.com/circuit/6424781689978880
Motor Current Sliding Mode Controller
http://everycircuit.com/circuit/5502940846751744
ΣΔ ADC w. Result Displayed
http://everycircuit.com/circuit/4549196269223936
300W Class D Amplifier w. Mosfet output
http://everycircuit.com/circuit/5452375043342336
Three Phase Star Δ Safe Relay Wiring
http://everycircuit.com/circuit/4748634531037184
Accidental 555 High Voltage Generator LOL
http://everycircuit.com/circuit/5057154477457408
