A Field Programmable Analog Array using floating gates for high resolution tuning

This paper presents a G
_m
-C based field programmable analog array implemented in a 0.13 mum CMOS technology. It combines coarse adjustability via OTA and capacitor arrays, with fine tunability through floating gate bias current sources. It can instantiate almost arbitrarily complex continuous-time filters in a frequency range from 660 kHz to 135 MHz. Measurements show that filter coefficients can be tuned in steps of at least 1.5%, depending on filter type and bandwidth.