用于亚赫兹OTA- c滤波器的带微a /V跨导的轨对轨差分线性范围OTA

Proceedings. The 16th International Conference on Microelectronics, 2004. ICM 2004. Pub Date : 2004-12-06 DOI:10.1109/ICM.2004.1434749

A. El mourabit, G. Lu, P. Pittet

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引用次数: 7

摘要

本文提出了一种跨导极小的轨对轨亚阈值OTA新结构，适用于实现极低频滤波。我们利用多输入浮栅(MIFG)晶体管的直流电平转换的固有特性，通过将这些器件串行堆叠在二极管连接配置中，作为亚阈值OTA的源退化，同时实现轨到轨差分线性范围和非常小的跨导。在2v供电电压下，输入2vpp时，总谐波失真(THD)小于1%。当偏置电流为1-100 nA时，跨导范围为15-150 pS，总功耗低于2 /spl mu/W。

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Rail-to-rail differential linear range OTA with pico-A/V transconductance for subHertz OTA-C filter

This paper presents a new configuration of a rail-to-rail subthreshold OTA with very small transconductance suitable for implementing extreme low frequency filter. We exploit the intrinsic property of dc-level translation of multiple input floating gate (MIFG) transistor by serially stacking such devices in diode connected configuration as source degeneration of a subthreshold OTA which achieves simultaneously rail-to-rail differential linear range and very small transconductance. Under 2 V supply voltage, the total harmonic distortion (THD) is less than 1% for 2 Vpp input. The transconductance range is 15-150 pS for a biasing current of 1-100 nA while the total power consumption is kept below 2 /spl mu/W.

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Proceedings. The 16th International Conference on Microelectronics, 2004. ICM 2004.

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