A long-term analogue memory based on continuous-time, current-mode algorithmic A/D-D/A converters is presented. It achieves an efficient performance in terms of speed, resolution, power, and area, while incorporating self-checking capability. Its operation is described and illustrated with experimental results of a CMOS-2.4μm prototype with 7bit resolution. INTRODUCTION Long-term storage of ana...

In this paper, a novel circuit realizing the square rooting function in current-mode is presented. The circuit makes use of a recently proposed active building block (ABB), namely the current controlled current differencing transconductance amplifier (CCCDTA). The circuit offers the following advantages: (i) a complete current-mode circuit makes it suitable for current-mode signal processing ap...

This article presents a current-mode quadrature oscillator using current controlled current conveyor transconductance amplifiers (CC-CCTAs) as active elements. The proposed circuit is realized from a lossy integrator and a lossy differentiator. The oscillation condition and oscillation frequency can be electronically controlled via input bias currents. The proposed oscillator can be applied to ...

Use of current-mode CMOS circuits for implementation of multiple-valued logic (MVL) functions has been considered in a number of recent papers . In this paper, we present an application of these circuits in realization of Galoisfield operations. We also give a new algorithm for determination of polynomial representations for arbitrary functions over a class of Galoisjelds implementable with pre...

We present the performance of three different multivalued current mode 1-bit adders. These circuits have been simulated with the electrical parameters of a standard 1.2 μm CMOS technology. The performance of a binary voltage mode 1-bit adder is also presented. The binary version uses twice more transistors comparing with multivalued ones, but it is two or three times faster. Multivalued version...

A second order voltage mode tunable universal filter is presented. The voltage mode filter is based on dual output second generation current controlled current conveyor (DOCCCII). The filter is capable of realizing high pass (HP), low pass (LP), band pass (BP), notch pass (NP) and all pass (AP) responses in voltage mode (VM). The filter employs only two capacitors and hence enjoys minimum compo...

Recently, the V type of constant on-time control has been widely used to improve light-load efficiency. In V implementation, the nonlinear PWM modulator is much more complicated than usual, since not only is the inductor current information fed back to the modulator, but the capacitor voltage ripple information is also fed back to the modulator. Generally speaking, there is no sub-harmonic osci...

A CMOS continuous time current-mode circuit which provides the maximum of n analog inputs is presented. This structure exhibits a O(n) complexity, and allows high precision and speed with small area and very low power dissipation. Its operation is discussed and illustrated with simulation results. INTRODUCTION Multiple-input Max/Min circuits are basic building blocks in many advanced computatio...

A current controllable current-mode universal filter with four inputs and one output employing multi-output current-controlled current conveyors (MOCCCIIs) is described. The proposed circuit offers the following attractive features: employment the minimum number of active and passive components, i.e., two MOCCCIIs and two grounded capacitors; simultaneous realization of all the standard filteri...