A flexible current‐mode classifier circuit and its applications

Abstract

In this paper a new CMOS classifier circuit is presented, simulated, and compared with other recently introduced circuits. The proposed CMOS circuit operates in current-mode and can classify several types of data. The architecture is designed using two threshold circuits and a subtraction circuit. Among many possible applications of the classifier circuit, template-based pattern classification, namely template matching and character recognition with corruption, and in another direction its use as a quantizer are given. Using 0.35- µm AMS technology parameters, SPICE simulations as well as hard realization results for the classifier and application circuits are included; detailed Monte Carlo analyses to assess parameter mismatch effects are also performed.Supported by the Scientific & Technological Research Council of Turkey (TUBITAK) under project 106E139

An Analog Template-Based Classifier Using MOS Translinear Loops

“…The main drawbacks of theses proposed circuits are as follows: firstly, these circuits operate in only one-quadrant input current that means the extra needed functions for full-wave rectification is needed; secondly, the extra needed functions lead to a large number of transistors and high power consumption; thirdly, the body effect of translinear MOSFETs in the squarer/divider block decreases the accuracy; finally, in these circuits due to the stacking of gate-source voltage of MOS transistors, they are often not well suited to lowvoltage operation. In [7], a MOS current-mode classifier based on current mirrors is presented; however, this circuit requires double supply and with the cost of a large supply voltage.…”