ABSTRACT
Analog square rooters are classified as (1) time division square rooters and (2) peak responding square rooters. The peak responding square rooters are further classified as (1) peak detecting square rooters and (2) peak sampling square rooters. A rectangular waveform, whose duty cycle is (1) proportional to one input voltage V1 and (2) inversely proportional to the output voltage VO, is generated. The amplitude of this rectangular waveform is constant. The average value of this rectangular waveform is proportional to the square root of input voltage VI. This is called a time division square rooter. Time division square rooters can be obtained by (1) using a saw tooth wave as reference, (2) a triangular wave as reference, and (3) using no reference. All time division square rooters use analog multiplexer and analog switches for their operation. Time division square rooters using multiplexers are described in this chapter, and those using switches are described in next chapter.
