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Temperature compensation in OTA-C integrators using a resistive bridge.

机译:使用电阻电桥在OTA-C积分器中进行温度补偿。

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摘要

In this thesis, a new technique for temperature compensation of Gm-C filters is presented. An Operational Transconductance Amplifier (OTA) as well as the output buffers is implemented in STMicroelectronics 9O-nm technology with 1.2 V supply voltage. Variation of a gate-capacitance implemented by an NMOS transistor with respect to temperature is investigated. Using negative feedback the Gm-cells' transconductance is locked to the reciprocal of a resistance array. Temperature behaviour of the Gm-C filter is examined by the behaviour of a Gm-C integrator without receiving an external frequency reference. Temperature dependency of the Gm/C ratio, which determines the unity-gain frequency of the integrator, is minimized by arranging the temperature dependency of the resistors. Unique properties of a proposed resistive bridge allow for the synthesis of temperature coefficients beyond the range of coefficients of constituent elements. With a set of practical elements a variation of only 0.66% in Gm/C has been achieved over -40°C to 120°C.
机译:本文提出了一种新型的Gm-C滤波器温度补偿技术。 STMicroelectronics的9O-nm技术采用1.2 V电源电压实现了运算跨导放大器(OTA)以及输出缓冲器。研究了由NMOS晶体管实现的栅极电容相对于温度的变化。使用负反馈,Gm单元的跨导被锁定到电阻阵列的倒数。通过Gm-C积分器的行为检查Gm-C滤波器的温度行为,而无需接收外部频率参考。通过确定电阻的温度依赖性,可以最小化确定积分器单位增益频率的Gm / C比的温度依赖性。所提出的电阻桥的独特特性允许合成超出组成元素系数范围的温度系数。使用一组实用元素,在-40°C至120°C范围内,Gm / C的变化仅为0.66%。

著录项

  • 作者

    Moradi, Arash.;

  • 作者单位

    Concordia University (Canada).;

  • 授予单位 Concordia University (Canada).;
  • 学科 Engineering Computer.
  • 学位 M.A.Sc.
  • 年度 2009
  • 页码 80 p.
  • 总页数 80
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

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