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

• Published in: Journal of semiconductors 2014-10, Vol.35 (10), p.152-162
• Main Author: 程小燕 杨海钢 尹韬 吴其松 张洪锋 刘飞
• Format: Article
• Language: English
• Subjects: Architecture; Arrays; Circuits; CMOS; CMOS工艺; FPAA; Interconnection; Lattice vibration; Semiconductors; Signal processing; 互连网络; 信号带宽; 双模式; 现场可编程模拟阵列; 设计; 路由交换机
• ISSN: 1674-4926
• DOI: 10.1088/1674-4926/35/10/105011

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 op- timal 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 μm 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 dB, while the signal processing precision in DT mode reaches 96.4%.