
Figure. 1.
Group refractive index, group velocity, group delay and the relationship between the speed of light

Figure. 2.
Low frequency circuit

Figure. 3.
Theoretical curve of amplitude response of low frequency circuit

Figure. 4.
Theoretical curve of amplitude-angle response of low-frequency circuits

Figure. 5.
Theoretical delay curve of low-frequency circuit groups

Figure. 6.
First-order high-frequency circuit

Figure. 7.
Second order high frequency circuit

Figure. 8.
Theoretical curve of amplitude response of high frequency circuit

Figure. 9.
Ideal amplitude-angle response curve of high frequency circuit

Figure. 10.
Ideal delay curve of high frequency circuit group

Figure. 11.
Low frequency working circuit in Multisim analog system

Figure. 12.
Test result of sinusoidal pulse of certain frequency in low frequency circuit

Figure. 13.
Test results of a frequency modulation pulse of a low frequency circuit

Figure. 14.
Low frequency circuit test results

Figure. 15.
Test results of high frequency circuit

Figure. 16.
Low frequency circuit output pulse interrupt

Figure. 17.
Low frequency circuit pulse peak missing