A 10-Bit 100MHz CMOS Pipelined A/D Converter

A 10-bit 100 MS/s CMOS pipelined A/D converter was presented.By using gain boost technique and a new auxiliary operational amplifier,a high performance OTA with a DC gain of 100 dB and a GBW of 1.2 GHz was realized.An improved digital correction unit was employed,which can store output digital signal accurately,and alleviate effects of noise.It has been demonstrated that the effective number of bits of the system was improved by 0.5 bit.Simulation based on TSMC's 0.18 μm CMOS process showed that,at all process corners in the temperature range from-20 ℃ to 85 ℃,the proposed circuit could satisfy requirements for 10-bit 100 MHz pipelined ADC.