Title :
Design of On-Chip Transformer With Various Coil Widths to Achieve Minimal Metal Resistance
Author :
Hsu, Heng-Ming ; Tseng, Chien-Wen
Author_Institution :
Nat. Chung Hsing Univ., Taichung
Abstract :
A layout design algorithm of a variable-width transformer is proposed to minimize metal resistance in this letter. The proposed algorithm can rapidly design metal widths in each coil of a planar transformer for a given chip area. Two on-chip transformers with identical self-inductance are fabricated to verify the proposed algorithm in 90-nm CMOS technology. Measurement results demonstrate the improvement of metal resistance approximates to the value of 11.6%. Results of this study provide an effective algorithm to design a minimal-loss transformer for radio frequency integrated circuit applications.
Keywords :
CMOS integrated circuits; coils; radiofrequency integrated circuits; transformers; CMOS technology; coil widths; layout design algorithm; metal resistance; on-chip transformer; planar transformer; radio frequency integrated circuit; size 90 nm; variable-width transformer; Algorithm design and analysis; CMOS technology; Coils; Electrical resistance measurement; Impedance; Inductors; Integrated circuit measurements; Integrated circuit technology; Radiofrequency integrated circuits; Semiconductor device measurement; Analytical algorithm; minimum resistance; on-chip transformer; variable metal width;
Journal_Title :
Electron Device Letters, IEEE
DOI :
10.1109/LED.2007.906934
