Abstract
Abstract—This paper presents a sub-mW mixer-first RF front-end that exploits a novel capacitive stacking technique in an altered bottom-plate N-path filter/mixer to achieve passive voltage gain and high-linearity at low noise figure. Capacitive stacking is realized implicitly by reading out the voltage from the bottom-plate of N-path capacitors instead of their top-plate, which provides a 2x gain at the read-out capacitors. Additional passive voltage gain is achieved using impedance upconversion while improving the out-of-band linearity performance of small switches. With no other active circuitry, only clock generation circuits determine the total power consumption of this RF frontend. A prototype is fabricated in GF22nm FDSOI technology. Operating at fLO= 1 GHz, the prototype achieves a voltage gain of 13 dB, 5 dB Noise Figure and +25=+66dBm Out-of-band IIP3/IIP2 at 160MHz offset while consuming only 600 _W of power from a 0.8V supply.
Original language | English |
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Title of host publication | IEEE Radio Frequency Integrated Circuits Symposium 2019 |
Place of Publication | Boston, Massachusetts, US |
Publisher | IEEE |
Pages | 91-94 |
Number of pages | 4 |
ISBN (Electronic) | 978-1-7281-1701-0 |
DOIs | |
Publication status | Published - 3 Jun 2019 |
Event | IEEE Radio Frequency Integrated Circuits Symposium 2019 - Boston Convention and Exhibition Center, Boston, United States Duration: 2 Jun 2019 → 4 Jun 2019 |
Conference
Conference | IEEE Radio Frequency Integrated Circuits Symposium 2019 |
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Abbreviated title | RFIC 2019 |
Country/Territory | United States |
City | Boston |
Period | 2/06/19 → 4/06/19 |
Keywords
- passive mixer
- N-path filter
- mixer-first receiver
- bottom plate mixing
- capacitive stacking
- high linearity
- Low Power
- RF front-ends