*6.4. Decryption Process*

The decryption signal is referred to by *Md*(*k*). This output signal is sent to Pin 5, which in turn sends it immediately to delta demodulation, which is designed by an analog electronics via the operating amplifier. Figure 13 shows the delta demodulation composite of a Delta demodulation integrator. An op-amplifier as a low pass filter is used to send the signals and obtain the final *Mr*(*s*), which is equal to the original signal M(s).
