Pulse-Modulated Analog Neuron Circuits BOYD FOWLER AND ABBAS EL GAMAL

Abslract. Analog neuron circuits based on both frequency modulation and pulse modulation are investigated. The circuits are compared in terms of size, power, performance, and reliability; frequency modulation shows advantages in each area. Test circuits were designed and fabricated in 2/zm CMOS technology. The frequency modulated neuron has an operational frequency of 3.125 MHz and a dynamic range of 17 bits. Our results indicate that this circuit technique may provide substantial advantages in high-performance, low-power neural systems.