18um CMOS process, we realized that pipeline A/D converter which includes fully differential output gain boosting amplifier, sample and hold stage, accurate multiply-by-two circuits, novel high-speed comparator, two-phase non-overlapping clock, digital error correction circuits and so on.

To accomplish a voltage comparator with very low threshold and high precision that is quite complex in the integrated circuit of single power supply,a new comparator with extraordinary low threshold is designed.

It introduces a method of constructing high precision voltage comparator with 312 bit A/D converter IC7107, to the effect and the V\%\-\{in\} comparing precision can reach to 0.

The discriminator circuit is mainly composed of an integrated voltage comparator, MAX921, and owns the characters of very low power and low operating voltage.

Based on the analysis of some phenomena observed when applying integrated circuit operational amplifier as voltage comparators, this paper tries to present some causes and find out a solution by further analysing the observed deviations from theories; thus to strengthen the relationship between theory and experiment and to improve students expereimental capabilitie

Ultra high-speed ADC and DAC are important parts of modern high-speed communication system and signal processing system and the ultra high-speed comparator design is the key point of the ultra high-speed ADC and DAC design.