An improved fully-balanced current-mode integrator structure is presented. The proposed structure improves the low frequency CMRR of integrators reported in the literature from the order of g(m)/g(o) to g(m)(2)/g(o)(2). Moreover, the new structure provides more flexibility to guarantee stability and is less sensitive to process mismatch. Several integrator topologies are compared. The differential and common-mode gains and the CMRR at low and high frequencies are analyzed.

This paper presents a new approach to develop Field Programmable Analog Arrays (FPAAs),^1 which avoids excessive number of programming elements in the signal path, thus enhancing the performance. The paper also introduces a novel FPAA architecture, devoid of the conventional switching and connection modules. The proposed FPAA is based on simple current mode sub-circuits. An uncompounded methodology has been employed for the programming of the Configurable Analog Cell (CAC). Current mode approach has enabled the operation of the FPAA presented here, over almost three decades of frequency range. We have demonstrated the feasibility of the FPAA by implementing some signal processing functions.

This paper presents a new approach to develop Field Programmable Analog Arrays (FPAAs). It is based on a simple current-mode primitive which allows easy adaptability to implement the fundamental analog functions such as integration, attenuation and amplification. A novel solution to avoid the use of excessive number of programming devices in the signal path is proposed. The paper also introduces an architecture for the FPAA, which is devoid of the conventional switching and connection modules used in Field Programmable Gate Arrays (FPGAs). High frequency operation, a simple programming methodology, operation over almost three decades of frequency (30 kHz to 10 MHz), and use of a standard digital CMOS fabrication process are the salient features of the proposed FPAA. We have demonstrated the feasibility of the FPAA by implementing some signal processing functions.