A novel architecture for current-feedback instrumentation amplifiers with rail-to-rail input range

被引：0
|
作者：
Del Cesta, F. [1 ]
Longhitano, A. N. [1 ]
Bruschi, P. [1 ]
Piotto, M. [2 ]
机构：
[1] Univ Pisa, Dipartimento Ingn Informaz, Pisa, Italy
[2] IEIIT, CNR, Pisa, Italy
来源：
2014 10TH CONFERENCE ON PH.D. RESEARCH IN MICROELECTRONICS AND ELECTRONICS (PRIME 2014) | 2014年
关键词：
instrumentation amplifier; current-feedback; rail-to-rail common-mode voltage range; sensor interface;
D O I：
暂无
中图分类号：
TM [电工技术]; TN [电子技术、通信技术];
学科分类号：
0808 ; 0809 ;
摘要：
This paper presents a fully-differential current-feedback instrumentation amplifier with rail-to-rail input common-mode (CM) voltage range. Gm mismatches due to input CM variations have been reduced exploiting an original common-modes equalization loop. Chopping modulation is adopted to improve the performances of the amplifier in terms of offset and low frequency noise, while the intrinsic low-pass transfer function of the amplifier is exploited for the reduction of the offset-ripple. A prototype has been designed using the UMC 0.18um MM/RF CMOS process. Simulations, performed with a supply voltage of 1.5 V, showed that a maximum relative gain error of nearly +/-1.5 %, against rail-to-rail input CM voltage variations, can be achieved.
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页数：4
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