A fully-differential base-band transimpedance low-pass filter is designed for use
in a direct conversion wireless receiver. Existing base-band transimpedance amplifiers
(TIA) often utilize single-pole filters which do not provide good stop-band rejection and
may even allow the filter to saturate in the presence of large interferers near the edge of
the pass-band. The designed filter is placed in parallel with an existing single-pole TIA
filter and diverts stop-band current signals away from the existing filter, providing added
rejection and safeguarding the filter from saturating. The presented filter has a
bandwidth of 10 MHz, achieves 35 dB rejection at 50 MHz (25 dB in post-layout
simulations), and can process interferers as large as 10 mA. The circuit is designed in
Jazz 0.18 m CMOS technology, and it is shown, using macromodels, that the design is
scalable to smaller, faster technologies.
| Identifer | oai:union.ndltd.org:tamu.edu/oai:repository.tamu.edu:1969.1/ETD-TAMU-2009-05-266 |
| Date | 2009 May 1900 |
| Creators | Hodgson, James K. |
| Contributors | Karsilayan, Aydin I. |
| Source Sets | Texas A and M University |
| Language | English |
| Detected Language | English |
| Type | Book, Thesis, Electronic Thesis, text |
| Format | application/pdf |
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