modulation

Hello, I am working on my Design AM transceiver system project. In this project, we are prohibited from using other integrated circuits except for the 555 integrated circuit. In this case, how can I do signal modulation and demodulation without using opamps and similar integrated circuits?

I am working on implementing the attached paper in MATLAB. I have successfully implemented the transmitter, but I am facing challenges with the receiver. The main issue is that the Zero-Forcing (ZF) equalizer (i.e., the inverse of the HH matrix) does not provide an acceptable BER when τ<1...

Hello everyone, I'm new to the forum. I have a preamp circuit where I am trying to make a demodulator for a LSK circuit(Load-shift-keying or backscattering) and am currentley simulating it in LTspice. The first stage includes an envelope detector which is fed to an amplifier. This is where I...

Hello, I have some questions regarding my implementation of IR LED detection with a phototransistor. Idea The main idea of the circuit is to make a circuit with incorporating a phototransistor, which will create a 0-5V signal on its output whether it detect IR LED presence. IR LED will be...

Hello, I'm not sure that I'm doing the PAM diagram correctly in LABVIEW. What I did is that I multiplied a Sine signal with a Square Signal and just filtered the signal. Attached are the circuit and results. Please let me know if something is wrong or missing.

Hello, I would like your suggestion on my first design Differential signal modulator [simulation attached]. Before jumping into design let me highlight my objective. I am differentiating a control signal of 1MHz and then modulating it with carrier frequency 15MHz(not limited to this specific...