Universal Current-Mode Analogue Amplifiers
C. Toumazou, John Lidgey · Institution of Engineering and Technology eBooks · 1993
The contents of this chapter have been arranged into two major parts. The first part concentrates upon techniques which extend the capabilities of the VOA to achieve current-mode performance. Several current-converter circuit designs have been reported which employ the VOA, attempting to provide it with a well-defined current output facility. One of the most successful techniques is VOA supply current sensing, where current-mirrors are used to sense the output current of the VOA via its power supply rails. The authors have developed a number of novel circuit applications based upon VOA supply current sensing and a review of this work will be presented.