Analysis and Design of High-Energy-Efficiency Amplifiers for Delta-Sigma Modulators

Table 1

FIA structure and performance comparison between the improved amplifiers.

Parameters	Structure
	FIA [7]	Cascode FIA [9]	INVINV FIA [10]	This work
DC gain	Low	Medium	Medium	High
Output swing	Large	Medium	Large	Medium
In-band noise	Low	Low	Medium	Medium
In-band noise with a chopper	Low	Low	Medium	Low