New Memristor Applications: AM, ASK, FSK, and BPSK Modulators

Implementations of amplitude (AM), amplitude-shift keying (ASK), frequency-shift keying (FSK), and binary phase-shift keying (BPSK) modulators with memristors are presented as new applications. The proposed modulators operate in current mode. They contain a preprocessing circuit that converts unipolar bit sequences into an appropriate form for modulation with at most two memristors. Using the memristor model developed by Biolek et al., PSPICE simulations of the proposed modulators that verify the mathematical derivations are presented.