Abstract
In a software-defined radio (SDR) receiver it is desirable to minimize RF band-filtering for flexibility, size and cost reasons, but this leads to increased out-of-band interference (OBI). Besides harmonic and intermodulation distortion (HD/IMD), OBI can also lead to blocking and harmonic mixing. A wideband LNA [1, 2] amplifies signal and interference with equal gain. Even a low gain of 6dB can clip 0dBm OBI to a 1.2V supply, blocking the receiver. Hard-switching mixers not only translate the wanted signal to baseband but also the interference around LO harmonics. Harmonic rejection (HR) mixers have been used [3, 1, 4], but are sensitive to phase and gain mismatch. Indeed the HR in [4] shows a large spread, whereas other work only shows results from one chip [3, 1]. This paper describes techniques to relax blocking and HD/IMD, and make HR robust to mismatch.
Original language | English |
---|---|
Title of host publication | IEEE International Solid-State Circuits Conference |
Place of Publication | Piscataway |
Publisher | IEEE |
Pages | 232-233 |
Number of pages | 2 |
ISBN (Print) | 978-1-4244-3458-9 |
DOIs | |
Publication status | Published - 8 Feb 2009 |
Event | IEEE International Solid-State Circuits Conference, ISSCC 2009 - San Francisco, United States Duration: 8 Feb 2009 → 12 Feb 2009 |
Conference
Conference | IEEE International Solid-State Circuits Conference, ISSCC 2009 |
---|---|
Abbreviated title | ISSCC |
Country/Territory | United States |
City | San Francisco |
Period | 8/02/09 → 12/02/09 |
Keywords
- METIS-263872
- IR-65508
- EWI-15404