Dynamic DC offset is one of the biggest problems preventing the implementation of
single chip receivers. This thesis presents a 2.4GHz downconversion mixer designed to
work with adaptive DC offset cancellation for a fully integrated direct conversion
receiver. Offset can be removed by dynamically changing the PFET load bias in a
Gilbert Cell type mixer. A dual-loop algorithm, which was developed in separate work,
controls a current-steering DAC that dynamically changes the PFET load bias of the
mixer. The mixer has a gain of 8dB, an IIP3 of l7dBm, and a noise figure of 15dB. In
addition a CMOS RF Front-End incorporating the offset cancellation mixer is presented
that meets the specifications for Bluetooth. / Graduation date: 2001
| Identifer | oai:union.ndltd.org:ORGSU/oai:ir.library.oregonstate.edu:1957/32789 |
| Date | 27 February 2001 |
| Creators | Schmidbauer, Hardy |
| Contributors | Stonick, John T. |
| Source Sets | Oregon State University |
| Language | en_US |
| Detected Language | English |
| Type | Thesis/Dissertation |
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