Maximal Q Factor for an On-Chip, Fuse-Based Trimmable Capacitor

Electronics

Joakim Nilsson¹  Jonny Johansson¹  Johan Borg² 

[1] Department of Computer Science, Electrical and Space Engineering, Luleå University of Technology, 971 87 Luleå, Sweden;Department of Physics, Imperial College, London SW7 2AZ, UK;

关键词: fuse;    resonant circuit;    trimmable capacitor;    single-chip;   

DOI  :  10.3390/electronics8010062

来源: DOAJ

【 摘 要 】

This paper presents a circuit for realising a fuse-programmable capacitor on-chip. The trimming mechanism is implemented using integrated circuit fuses which can be blown in order to lower the resulting equivalent capacitance. However, for integrated circuits, the non-zero fuse resistance for active fuses and finite fuse resistance for blown fuses limit the Q factor of the resulting capacitor. In this work, we present a method on how to arrange the fuses in order to achieve maximal worst-case Q factor for the given circuit topology given the process parameters and requirements on capacitance. We also analyse and discuss the accuracy and limitations of the topology with regard to fuse resistance and parasitic elements such as bond pads.

【 授权许可】

Unknown