Analysis of Integral Nonlinearity in Radix-4 Pipelined Analog-to-Digital Converters

In this paper, an analytic approach to estimate the nonlinearity of radix-4 pipelined analog-to-digital converters due to the circuit non-idealities is presented. Output voltage of each stage is modeled as sumof the ideal output voltage and non-ideal output voltage (error voltage), in which non-ideal outputvoltage is created by capacitor mismatch, comparator offset, input offset, and finite gain of amplifier. The integral nonlinearity (INL) can be obtained as the expected value of total input error due to theerrors in all stages of radix-4 pipelined ADC.

کلیدواژه ها:

Radix-4 ، Pipeline ، Capacitor Mismatch ، Total Error ، Integral Nonlinearity