Comparator Design for Low Power High Speed Flash ADC-A Review

Analog to Digital Converters play a significant role in the semiconductor industry. Due to the advancements in the field of wireless technology, ADCs are widely used to convert the analog signals to the digital format. Different types of ADCs are available and among these, flash ADCs are the fastest and so they are used for large bandwidth applications. Resistor ladder, comparator and encoder are the building blocks of flash ADC. Comparator section has a direct impact on the overall performance of ADC. So this paper compares various comparator topologies and finally a suitable design for flash ADC is suggested.