In this work, the design of a CMOS broadband low noise amplifier with inherent high
performance single-to-differential conversion is presented. These characteristics are
driven by the double quadrature single conversion digital television tuner which requires
accurately balanced differential signals to perform its function and to improve image
rejection.
A three-stage amplifier is designed to satisfy several requirements of front-end circuits at
the same time. The resistive shunt-feedback topology is adopted to implement a
single-ended broadband low-noise amplifier as the first stage. The second stage is an
on-chip single-to-differential converter, which employs a novel method to improve its
balancing performance. A fully differential buffer capable of driving heavy loads is used
as the third stage to further suppress the phase and magnitude errors of output
differential signals.
Fabricated in 0.35??m TSMC standard CMOS technology, the designed broadband
front-end amplifier manages to limit the phase error to within ??1.5?? and magnitude error
??0.75dB over 50~850 MHz frequency range, with 16dB gain and a noise figure of 4dB.
| Identifer | oai:union.ndltd.org:tamu.edu/oai:repository.tamu.edu:1969.1/2332 |
| Date | 29 August 2005 |
| Creators | Zhang, Guang |
| Contributors | Silva-Martinez, Jose |
| Publisher | Texas A&M University |
| Source Sets | Texas A and M University |
| Language | en_US |
| Detected Language | English |
| Type | Book, Thesis, Electronic Thesis, text |
| Format | 1058127 bytes, electronic, application/pdf, born digital |
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