Design and analysis of a dual mode CMOS field programmable analog array

作者：Cheng Xiaoyan; Yang Haigang; Yin Tao; Wu Qisong; Zhang Hongfeng; Liu Fei; Institute of Electronics Chinese Academy of Sciences; University of Chinese Academy of Sciences

来源：Chinese Journal of Semiconductors, 2014, 35(10): 156-166.

DOI：10.1088/1674-4926/35/10/105011

• field-programmable gate array
• field-programmable analog array
• configurable analog block
• rail-to-rail
• biquadratic filters

This paper presents a novel field-programmable analog array(FPAA) architecture featuring a dual mode including discrete-time(DT) and continuous-time(CT) operation modes, along with a highly routable connection boxes(CBs) based interconnection lattice. The dual mode circuit for the FPAA is capable of achieving targeted optimal performance in different applications. The architecture utilizes routing switches in a CB not only for the signal interconnection purpose but also for control of the electrical charge transfer required in switched-capacitor circuits.This way, the performance of the circuit in either mode shall not be hampered with adding of programmability. The proposed FPAA is designed and implemented in a 0.18 m standard CMOS process with a 3.3 V supply voltage.The result from post-layout simulation shows that a maximum bandwidth of 265 MHz through the interconnection network is achieved. The measured results from demonstrated examples show that the maximum signal bandwidth of up to 2 MHz in CT mode is obtained with the spurious free dynamic range of 54 d B, while the signal processing precision in DT mode reaches 96.4%.

• 出版日期2014-10-15
• 单位中国科学院大学