This brief presents a variable-gain amplifier (VGA) for automotive radar applications integrated in a 28-nm fully depleted (FD) silicon-on-insulator (SOI) CMOS technology. The amplifier operates at a power supply as low as 1 V and guarantees 30-dB linear-in-dB gain variation with a 3-dB step. The back-gate of the MOS transistors has been exploited to implement a back-gate control-based offset cancelation loop, thus avoiding the use of inter-stage coupling capacitors that introduce frequency limitations due to parasitic capacitances. The VGA exhibits a bandwidth from 100 kHz to 20 MHz, which is compliant with typical frequency-modulated continuous wave (FMCW) radars. It also guarantees a 1-dB compression point (P-1dB) better than -36 dBm and an input-referred noise (IRN) of 12.5 nV/root Hz and 7 nV/root Hz at 1 MHz and 10 MHz, respectively, with a power consumption as low as 1.7 mW.

A 28-nm FD-SOI CMOS Variable-Gain Amplifier with Body-Bias-Based DC-Offset Cancellation for Automotive Radars

Ragonese E.
;
Palmisano G.
2019

Abstract

This brief presents a variable-gain amplifier (VGA) for automotive radar applications integrated in a 28-nm fully depleted (FD) silicon-on-insulator (SOI) CMOS technology. The amplifier operates at a power supply as low as 1 V and guarantees 30-dB linear-in-dB gain variation with a 3-dB step. The back-gate of the MOS transistors has been exploited to implement a back-gate control-based offset cancelation loop, thus avoiding the use of inter-stage coupling capacitors that introduce frequency limitations due to parasitic capacitances. The VGA exhibits a bandwidth from 100 kHz to 20 MHz, which is compliant with typical frequency-modulated continuous wave (FMCW) radars. It also guarantees a 1-dB compression point (P-1dB) better than -36 dBm and an input-referred noise (IRN) of 12.5 nV/root Hz and 7 nV/root Hz at 1 MHz and 10 MHz, respectively, with a power consumption as low as 1.7 mW.
Automotive electronics; CMOS technology; differential amplifiers; feedback circuits; millimeter wave radar; VGA
File in questo prodotto:
File Dimensione Formato  
A 28-nm FD-SOI CMOS Variable-Gain Amplifier.pdf

non disponibili

Tipologia: Versione Editoriale (PDF)
Dimensione 1.1 MB
Formato Adobe PDF
1.1 MB Adobe PDF   Visualizza/Apri

I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.

Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/20.500.11769/371014
Citazioni
  • ???jsp.display-item.citation.pmc??? ND
  • Scopus 7
  • ???jsp.display-item.citation.isi??? 6
social impact