Week 4 Test Circuit and Modulation

We have simulated the circuit in MULTISIM and output waveforms are correct. In this week, we mainly tested circuit and modify it.

In the beginning, sine waveform was used as the input signal and oscilloscope was used to display the output signal. The output signal is correct which was showed in following picture.

However, the output signal will be not correct when we connected sensor in the circuit.

 Therefore, we had to test each part of the circuit. One part includes an amplifier. Unfortunately, each part can not be found any problem. We thought that sensor is broken or the connection of it is not correct. But these guesses were denied by researching information and testing.

So we thought that our design has problem, although it can be simulation perfectly. We have to design the circuit again and test it next week.