An OTA-C field programmable analog array for multi-mode filtering applications

This paper presents a reconfigurable analog array and its possible application in multi mode wireless communication equipments. The array is built around configurable analog blocks comprised of linearized, fully differential transconductance amplifiers. The circuit sacrifices a degree of generality in favor of specialized filtering operations at high frequencies, low consumption and good linearity, all required in modern communication devices. The programming of the filter frequency parameters is achieved through binary weighted transconductor arrays and a capacitance scaling circuit. The proposed analog array has been simulated at transistor level by using the Eldo simulation engine on a 90nm digital CMOS process.