Design and application of precise analog computational circuits
New versatile building blocks for implementing analog functional circuits such as a multiplier, a squarer, and a square rooter based on functional terms of a differential input circuit are proposed and implemented in 0.25 um CMOS process. The input range of these circuits is over +/- 1.0 V with a high linearity of less than 4% for 3.3 V power supply. The -3 dB bandwidth of all discussed circuits has been measured to over 200 MHz. The functional circuit size is 340 mu m(2), and its typical power consumption is about 90 uW.
analog functional circuit multiplier squarer rectifier