A subthreshold CMOS circuit for a piecewise linear neuromorphic oscillator with current-mode low-pass filters

Kazuki Nakada, Tetsuya Asai, Tetsuya Hirose, Hatsuo Hayashi, Yoshihito Amemiya
2007 Neurocomputing  
We propose an analog current-mode subthreshold CMOS circuit implementing a piecewise linear neuromorphic oscillator. Our circuit was derived from a piecewise linear oscillator model proposed by Matsuoka, well known as a building block for constructing a robot locomotion controller. We modified Matsuoka's oscillator to be suitable for analog current-mode integrated circuit implementation, and designed and fabricated it as an analog current-mode circuit. Through circuit simulations and
more » ... l results on a fabricated chip, we demonstrate that our neuromorphic oscillator generates a stable oscillation, and the amplitude and frequency of the oscillation can be controlled by tuning bias currents over a wide range. Further, we propose a compensation for device mismatch in the neuromorphic oscillator through feedback from a coupled physical system. r
doi:10.1016/j.neucom.2006.11.026 fatcat:aipd3xk5hfh5bfgnihxuf4qhw4