Environmental Adaptive Programmable Analog LSI

本研究的重点是模拟LSI的可编程技术，这些技术对老化退化和环境变化具有很高的耐受性。本文的主要贡献如下：(1)提出了以差分放大电路为单元的可编程差分对晶体管模块，并开发了可配置模拟模块。该CAB由(A)体偏置Vth调谐电路，(B)PMOS/NMOS-PTDB，(C)PMOS/NMOS晶体管阵列，(D)电阻和电容阵列，(E)布线资源和开关矩阵组成。(2)通过对MOS晶体管沟道长度(L)的分解，阐明了对模拟电路DC/AC特性的影响。通过对测试芯片的评价，发现2-L和4-L分解对DC/AC特性影响不大。提出了一种具有低温特性的可编程金属对金属电容器阵列，并给出了基于合成孔径雷达-模数转换机制的电容估算方法。

This study is focusing on the programmable technologies for analog LSIs, which serve the high tolerance to the aging degradation and environmental variation. The contributions of this study are summarized as follows;(1) We proposed the PDTB (Programmable Differential-pair Transistor Block) which make use of the differential amplifier circuit as an element, and developed the CAB (Configurable Analog Block). The CAB is composed of (a)Vth-tuning circuit by body biasing, (b)pMOS-/nMOS-PTDB, (c)pMOS/nMOS transistor array, (d)resistor and capacitor array, and (e)routing resource and switch matrix.(2) We clarified the influence on DC/AC characteristics of analog circuits by the decomposition of the channel length (L) of MOS transistors. Through evaluating the test chip, we revealed that 2-L and 4-L decomposition do not matter in the DC/AC characteristics. Furthermore, we developed the Programmable Delay Element (PDE) by applying L-decomposition with a switching mechanism.(3) We proposed the programmable metal-to-metal capacitor array which has a low temperature dependency, and also present the capacitance evaluation methodology by employing the SAR-ADC mechanism.