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《Journal of Dalian Maritime University》 1981-02
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Changeable Transconductance Four-quadrant Analogue Multiplier-divider

Sun Ruili  
In automatic control devices, electronic elements with a multiply-ing-dividing function are often required. There are many types of electric circuits with such a function which are based on a combination of transistors and operational amplifiers. Of them the simplest and most suitable for forming integration may be the changeable transcon-ductance type. It is such a type of analogue multiplier-divider with four-quadrant Operational amplification that is dealt with in this paper in a theoretical approach. Based on the analysis of this type of circuit, the writer suggests a scheme based on the assembling of indi- vidual transistors. This scheme may also be adopted for the manufacture of single chips of integrated circuits.
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