Research output per year
Research output per year
Vijaya Kumar Purushothaman, Eric A.M. Klumperink, Berta Trullas Clavere, Bram Nauta
Research output: Contribution to journal › Article › Academic › peer-review
A low-power interferer-robust mixer-first receiver front end that uses a novel capacitive stacking technique in a bottom-plate N-path filter/mixer is proposed. Capacitive stacking is achieved by reading out the voltage from the bottom plate of N-path capacitors instead of their top plate, which provides a 2\times voltage gain after downconversion. A step-up transformer is used to improve the out-of-band (OOB) linearity performance of small switches in the N-path mixer, thereby reducing the power consumption of switch drivers. This article explains the concept of implicit capacitive stacking and analyzes its transfer characteristics. A prototype chip, fabricated in 22-nm fully depleted silicon on insulator (FDSOI) technology, achieves a voltage gain of 13 dB and OOB IIP3/IIP2 of +25/+66 dBm with 5-dB noise figure while consuming only 600 \mu \text{W} of power at f_{\mathrm{ LO}}=1 GHz. Thanks to the transformer, the prototype can operate in the input frequency range of 0.6-1.2 GHz with more than 10-dB voltage gain and 5-9-dB noise figure. Thus, it opens up the possibility of low-power software-defined radios.
Original language | English |
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Article number | 8944060 |
Pages (from-to) | 1139-1150 |
Number of pages | 12 |
Journal | IEEE journal of solid-state circuits |
Volume | 55 |
Issue number | 5 |
Early online date | 27 Dec 2019 |
DOIs | |
Publication status | Published - 1 May 2020 |
Research output: Contribution to journal › Article › Academic › peer-review