TY - JOUR
T1 - Analysis of current conveyor error effects in signal-processing circuits
AU - Sun, Y.
AU - Fidler, J.K.
N1 - The definitive article is available at: http://www3.interscience.wiley.com/ Copyright John Wiley & Sons, Ltd. [Full text of this article is not available in the UHRA]
PY - 1996
Y1 - 1996
N2 - In this paper the modelling, analysis and compensation of current conveyor tracking non-idealities in signal-processing circuits employing the second-generation current conveyor (CCII) as a transconductance amplifier are generally investigated. The voltage- and current-following inaccuracies of the CCII are represented in the forms of absolute and relative errors. Analysis shows that the effects of absolute tracking errors in a non-ideal CCII-based transconductance amplifier can be represented by an ideal CCII transconductance amplifier with an external voltage or current offset source. With this model the circuit output signal shift due to tracking errors can be easily evaluated using any excitation-response circuit analysis method. For the relative error description the effects of CCII following inaccuracies are modelled as a change in the transconductance resistance for the CCII transconductance amplifier. The affected circuit parameters are therefore readily assessed by directly replacing the nominal transconductance resistance in the ideal expressions by the varied counterpart, and the impact of relative errors can thus be precisely compensated by simply adding a proper resistance in parallel or series with the transconductance resistance. The methods developed for conventional CCIIs with unity gains are also extended to incorporate generalized CCIIs with any specified voltage and current gains.
AB - In this paper the modelling, analysis and compensation of current conveyor tracking non-idealities in signal-processing circuits employing the second-generation current conveyor (CCII) as a transconductance amplifier are generally investigated. The voltage- and current-following inaccuracies of the CCII are represented in the forms of absolute and relative errors. Analysis shows that the effects of absolute tracking errors in a non-ideal CCII-based transconductance amplifier can be represented by an ideal CCII transconductance amplifier with an external voltage or current offset source. With this model the circuit output signal shift due to tracking errors can be easily evaluated using any excitation-response circuit analysis method. For the relative error description the effects of CCII following inaccuracies are modelled as a change in the transconductance resistance for the CCII transconductance amplifier. The affected circuit parameters are therefore readily assessed by directly replacing the nominal transconductance resistance in the ideal expressions by the varied counterpart, and the impact of relative errors can thus be precisely compensated by simply adding a proper resistance in parallel or series with the transconductance resistance. The methods developed for conventional CCIIs with unity gains are also extended to incorporate generalized CCIIs with any specified voltage and current gains.
U2 - 10.1002/(SICI)1097-007X(199607/08)24:4<479::AID-CTA929>3.0.CO;2-R
DO - 10.1002/(SICI)1097-007X(199607/08)24:4<479::AID-CTA929>3.0.CO;2-R
M3 - Article
SN - 0098-9886
VL - 24
SP - 479
EP - 487
JO - International Journal of Circuit Theory and Applications
JF - International Journal of Circuit Theory and Applications
IS - 4
ER -