Enhanced-Selectivity high-linearity low-noise mixer-first receiver with complex pole pair due to capacitive positive feedback
| Autor: | Yuan-Ching Lien, Eric A.M. Klumperink, Bram Nauta, Jon Strange, Bernard Mark Tenbroek |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2018 |
| Předmět: |
Physics
business.industry Amplifier Capacitive sensing 020208 electrical & electronic engineering Linearity 020206 networking & telecommunications 02 engineering and technology Noise figure Band-pass filter Negative feedback 0202 electrical engineering electronic engineering information engineering Baseband Optoelectronics Radio frequency Electrical and Electronic Engineering business |
| Zdroj: | IEEE journal of solid-state circuits, 53(5), 1348-1360. IEEE |
| ISSN: | 0018-9200 |
| Popis: | A mixer-first receiver (RX) with enhanced selectivity and high dynamic range is proposed, targeting to remove surface acoustic-wave-filters in mobile phones and cover all frequency bands up to 6 GHz. Capacitive negative feedback across the baseband (BB) amplifier serves as a blocker bypassing path, while an extra capacitive positive feedback path offers further blocker rejection. This combination of feedback paths synthesizes a complex pole pair at the input of the BB amplifier, which is upconverted to the RF port to obtain steeper RF bandpass filter roll-off and reduced distortion. This paper explains the circuit principle and analyzes RX performance. A prototype chip fabricated in 45-nm partially depleted silicon on insulator (SOI) technology achieves high out-of-band linearity (input-referred third-order intercept point (IIP3) = 39 dBm and input-referred second-order intercept point (IIP2) = 88 dB) combined with sub-3-dB noise figure. Desensitization due to a 0-dBm blocker is only 2.2 dB at 1.4 GHz. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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