Title :
Modified Inductive Peaking Direct Injection ILFD With Multi-Coupled Coils
Author :
Mahalingam, Nagarajan ; Kaixue Ma ; Kiat Seng Yeo ; Wei Meng Lim
Author_Institution :
Sch. of Electr. & Electron. Eng., Nanyang Technol. Univ., Singapore, Singapore
Abstract :
In this letter, we present the design of a fully differential direct injection locked frequency divider (D-ILFD) in 65 nm CMOS process. Based on strong coupling of multi-coupled coils, we propose a modified inductive peaking in the D-ILFD to improve the locking range with a compact core area. The proposed injection locked frequency divide-by-2 divider demonstrates an operation frequency range of 6.7 GHz for a low injected power of -8 dBm and single-ended output power of -4 dBm. With a supply voltage of 1 V, the power consumption of the D-ILFD is 2.5 mW and the power efficiency (Pout/PDC) is 8.3%.
Keywords :
CMOS integrated circuits; coils; coupled circuits; frequency dividers; power consumption; CMOS process; compact core area; complementary metal oxide semiconductor; efficiency 8.3 percent; frequency 6.7 GHz; injection locked frequency divider; locking range; modified inductive peaking direct injection ILFD; multicoupled coil; power 2.5 mW; power consumption; power efficiency; size 65 nm; voltage 1 V; Coils; Frequency conversion; Inductors; Metals; Power generation; Transistors; Tuning; Direct injection locked frequency divider (D-ILFD); divide-by-2 divider; multi-coupled coils; strong coupling;
Journal_Title :
Microwave and Wireless Components Letters, IEEE
DOI :
10.1109/LMWC.2015.2421310
