The next circuit Has the next Transfer Function Hs r3 R4r3

The next circuit Has the next Transfer Function: H(s) = r3 + R4/r3/s^2 (R1R2C1C2) + s (R1C1 + R2C1 + R1C2 (-R4/R3)) + 1 Using MATLAB - SIMULINK - SIMSCAPE (any way will do) Design a low pass filter (Select its cutoff frequency) using this op amp circuit and test it using your computer microphone or an audio file. Show the frequency spectrum of your original signal and the frequency spectrum after the filter. Compare with the filter\'s frequency response.

Solution

Common-emitter amplifiers are also used in radio frequency circuits, for example to amplify faint signals received by an antenna.^{[dubious – discuss]} In this case it is common to replace the load resistor with a tuned circuit. This may be done to limit the bandwidth to a narrow band centered around the intended operating frequency. More importantly it also allows the circuit to operate at higher frequencies as the tuned circuit can be used to resonate any inter-electrode and stray capacitances, which normally limit the frequency response. Common emitters are