1. Pookaiyaudom, S.: ‘Current-mode oscillators’, Toumazou, C., Circuits and systems: Tutorials, (IEEE ISCAS94 London 1994),11.4,
2. Gilbert, B.: ‘Current-mode circuits from a translinear viewpoint: A tutorial’, Toumazou, C., Lidgey, F.J., Haigh, D.G., Analogue IC design: The current-mode approach, IEE Circuits and Systems series 2(Peter Peregrinus Ltd 1990),2,