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Controlled dither in 90 nm digital to time conversion based direct digital synthesizer for spur mitigation

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5 Author(s)
S. Talwalkar ; Motorola Inc., Plantation, FL, 33322, USA ; T. Gradishar ; B. Stengel ; G. Cafaro
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Dithering is used in many discrete to continuous value conversion functions to provide an effective fractional value. This paper reviews the application of dither to a digital-to-time converter (DTC) based digital synthesizer suitable for many common wireless communication systems. Measurements of a 90 nm CMOS implementation using a 5 bit DTC show extension to effective 8 bits.

Published in:

2010 IEEE Radio Frequency Integrated Circuits Symposium

Date of Conference:

23-25 May 2010