A simple CMOS analog four-quadrant multiplier

✍ Scribed by P. A. Shoemaker; G. L. Haviland; R. L. Shimabukuro; I. Lagnado

• Book ID: 104649523
• Publisher: Springer
• Year: 1991
• Tongue: English
• Weight: 867 KB
• Volume: 1
• Category: Article
• ISSN: 0925-1030
• DOI: 10.1007/bf00161304

✦ Synopsis

A simple CMOS circuit which performs analog four-quadrant multiplication is described. Transconductance as well as voltage-mode operation is practicable. The basic circuit consists of only two transistors, at least one of which is depletion-mode. We analyze sources of error in the multiplier, and suggest additional circuitry to improve performance. The circuit has been fabricated in thin-film silicon-on-sapphire and test results are reported. Error relative to full-scale output, and total harmonic distortion with individual multiplicands varied sinusoidally, were both observed to be on the order of 1% to 3% with full-scale inputs.