CMOS circuit implementation of a coupled phase oscillator system using pulse modulation approach

This paper proposes a CMOS circuit using a pulse modulation approach for realizing nonlinear dynamics with phase variables. The phase variables are represented by pulse-width modulation signals, and an arbitrary nonlinear transform function is generated by using the corresponding nonlinear current waveform sampled with pulse-phase modulation signals. We have designed a coupled phase oscillator circuit using a 0.25 mum CMOS process. The measurement results using a fabricated chip demonstrate that the proposed circuit operates correctly as a nonlinear dynamical system with phase variables.