A 50-GHz divide-by-4 injection lock frequency divider using matching method
Resource
IEEE Microw. Wireless Compon. Lett,vol. 18, no. 5 ,344-346.
Journal
IEEE Microwave and Wireless Components Letters
Pages
344-346
Date Issued
2008-05
Date
2008-05
Author(s)
Abstract
A fully integrated divide-by-4 frequency divider has been designed, fabricated, and measured in the standard bulk 0.18- μm complementary metal-oxide semiconductor (CMOS) technology. A newly proposed matching technique was used to eliminate the unwanted low frequency mixing terms at the common node of the circuit so as to achieve a high division ratio of 4. The frequency divider exhibits a measured operation range of 5 GHz from 45.9 to 50.9 GHz. It consumes a dc power of 7.56 mW at a 1.2 V supply in the steady state operation. The phase noise of the free running divider is -88.51 dBc/Hz at 1 MHz offset and the locked divider is -110.74 dBc/Hz at 1 MHz offset. The chip size is only 0.35 mm × 0.5 mm including the pad frame. To our knowledge, this divider has the highest operation frequency to date among the high division ratio injection-lock type frequency dividers in commercial CMOS 0.18-μm process. © 2006 IEEE.
Subjects
Complementary metal-oxide semiconductor (CMOS) integrated circuits (ICs); Injection-locked oscillators; Millimeter-wave circuits
Type
journal article