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A novel current-mode analogue multiplier-divider based on the quadratic-translinear principle is presented. The input and output signals are all in current-mode. The circuit has favourable precision, wide dynamic range and is insensitive to variations in temperature and processing. It is suitable for VLSI implementation and can be used in many hardware design fields such as fuzzy logic controllers and analogue neural networks.

A new companding current-mode (CI) integrator principle is proposed. The integrator function is linear despite being composed of nonlinear parts. Its application promises monolithic filters with improved noise performance suitable for low supply voltages. A class AB circuit implementation is proposed which features an extended dynamic range.

The authors propose a new linear CMOS transconductor circuit. It has a transconductance linearly variable by a gate voltage and a rather high bandwidth. Moreover, this bandwidth remains constant when the transconductance is varied. The circuit exploits the square-law characteristic of MOS transistors biased in saturation.< >

Multivalued storage elements are of interest in the quest for higher information density of monolithic memories. The optimal radix to be used is a compromise between information content and cost factors such as silicon-chip area. Formulas are developed which enable the optimal radix to be found. Some recently proposed multivalued storage elements are evaluated for optimal radix by means of the derived formulas.

A simplified method of deriving stability criteria for nonlinear circuits is introduced. Unlike the conventional approach which requires construction of a small-signal equivalent circuit and identification of loops, only the basic nonlinear circuit equations are needed. The method is applied to the calculation of the worst-case static noise margin of I2L, which is shown to be much smaller than a recently published result.