A Current Conveyor based Field Programmable Analog Array

An approach for designing a Field Programmable Analog Array (FPAA) is described. The analog array is based on current conveyors and benefits from two major interests: a large bandwidth and a low number of discrete components needed for the implementation of analog functions. An Analog Elementary Cell (AEC), based on current conveyors has been developed, and it is associated with programmable resistors and capacitors. Analog functions can be performed programming several AECs as current-mode amplifiers, analog multipliers, etc. The main purpose of this paper is to introduce current conveyor based analog blocks which are very-well suited for the implementation of FPAA. A particular interconnection architecture is addressed using current conveyors as switches. The major key feature of the proposed approach is that current conveyors are used as active elements and switching elements. A new topology based on the developed AEC is proposed and should be shortly validated.

[1]  A. Fabre,et al.  Universal current mode biquad implemented from two second generation current conveyors , 1995 .

[2]  A. Fabre,et al.  High frequency applications based on a new current controlled conveyor , 1996 .

[3]  S. P. Singh,et al.  A new floating resistor for CMOS technology , 1989 .

[4]  R. Schaumann,et al.  Current-mode amplifier/integrator for a field-programmable analog array , 1995, Proceedings ISSCC '95 - International Solid-State Circuits Conference.

[5]  Michiel Steyaert,et al.  High-performance CMOS continuous-time filters , 1993, The Kluwer international series in engineering and computer science.

[6]  Brett Wilson.  High-performance current conveyor implementation , 1984 .

[7]  Gordon W. Roberts,et al.  The current conveyor: history, progress and new results , 1990 .

[8]  Yannis Tsividis,et al.  Design of Mos Vlsi Circuits for Telecommunications , 1985 .

[9]  K. Nagaraj.  New CMOS floating voltage-controlled resistor , 1986 .

[10]  Christofer Toumazou,et al.  Analogue IC design : the current-mode approach , 1993 .

[11]  Christofer Toumazou,et al.  Universal active filter using current conveyors , 1986 .

[12]  Yannis Tsividis,et al.  Floating voltage-controlled resistors in CMOS technology , 1982 .

[13]  A. Fabre,et al.  Insensitive current-mode biquad implementation based on translinear current conveyors , 1992, Proceedings Euro ASIC '92.

[14]  Martin A. Brooke,et al.  Low control voltage programming of floating gate MOSFETs and applications , 1994 .

[15]  E.K.F. Lee,et al.  A transconductor-based field-programmable analog array , 1995, Proceedings ISSCC '95 - International Solid-State Circuits Conference.

[16]  M.A. Brooke,et al.  A floating-gate MOSFET with tunneling injector fabricated using a standard double-polysilicon CMOS process , 1991, IEEE Electron Device Letters.

[17]  M.A. Perkowski,et al.  A field programmable analog array for continuous, fuzzy, and multi-valued logic applications , 1994, Proceedings of 24th International Symposium on Multiple-Valued Logic (ISMVL'94).

[18]  F. Martin,et al.  Current mode allpass/notch and bandpass filters with reduced sensitivities , 1990 .

[19]  E.K.F. Lee,et al.  Field programmable analogue array based on mosfet transconductors , 1992 .

[20]  G. Caille,et al.  Designs of a logarithmic and exponential amplifiers using current conveyors , 1996, Proceedings of Third International Conference on Electronics, Circuits, and Systems.

[21]  B. Wilson,et al.  Recent developments in current conveyors and current-mode circuits , 1990 .