一种基于电流偏差的折叠级联开关OTA

Proceedings of the Fourth IEEE International Caracas Conference on Devices, Circuits and Systems (Cat. No.02TH8611) Pub Date : 2002-08-07 DOI:10.1109/ICCDCS.2002.1004008

R. Salinas-Cruz, G. Espinosa-Flores-V

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引用次数: 3

摘要

提出了一种改进的全差分折叠级联码OTA(操作跨导放大器)，开关频率为16 MHz，单电源电压为3 V。开关过程是通过OTA输出阶段的电流偏差来完成的，而不是关闭其偏置电流或中断来自电源的电流路径。理论结果表明了采样频率与折叠级联码OTA设计参数之间的关系。HSPICE仿真结果表明，在OTA输出级，通过晶体管的电流开关是正确的。

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A folded-cascode switched OTA based on current deviation

An improved version of a fully differential folded-cascode OTA (operational transconductance amplifier), switched at 16 MHz with a single 3 V supply voltage, is presented. The switching process is performed by current deviation at the OTA output stage, instead of turning off its bias current or interrupting the current path from the power supply. Theoretical results show the relationship between the sampling frequency and the folded-cascode OTA design parameters. Simulated results using HSPICE show that the current through the transistors at the OTA output stage is switched properly.

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Proceedings of the Fourth IEEE International Caracas Conference on Devices, Circuits and Systems (Cat. No.02TH8611)

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