Pspice Simulation of NL-Transmission Line A/D ...

Nonlinear transmission lines (NLTL) that consist of coplanar waveguide periodically loaded with resonant tunnel diode are capable of shaping signal waveforms during transmission. Such system is the basis of very interesting microwave signal generation circuits and it has a lot of applications in electronics. Pspice is used to model analog to digital converter by generating short electrical pulses on a nonlinear transmission line. Nonlinear transmission line is realized as electrical lattice with N electrical cells coupled by inductor and resistor in series. Each cell consists of a resonant tunnel diode in parallel with both resistor and capacitor. Attenuation represented by the resistor is cancelled by nonlinear effect. This cancellation produces the desired effect.