CURRENT-MODE SIGNAL PROCESSING CIRCUITS
V. Mannama · Proceedings of the Estonian Academy of Sciences Engineering · 1997
This paper presents a short overview of current-mode signal processing principles and their implementation in modern circuit design.The translinear principles for bipolar structures are explained.Main properties of the static and dynamic current mirrors are described.The theoretical basis of current conveyors (CC) is given, and an implementation of CC with a "diamond" structure is demonstrated.The current-feedback operational amplifier, as a versatile circuit component with high speed and slew rate, is analyzed.Implementation of the current-mode approach in order to improve the dynamic behaviour of precise rectification is discussed.A modified bridge bias arrangement is presented for a precision current-mode rectifier that avoids the adjustment sensitivity, and current-mode bridge rectification is analyzed.An improved all-conveyor current-mode wideband rectifier design is described, which can also be used in high-speed balanced modulators.