A 260-MHz RF Bandwidth Mixer-First Receiver With Third-Order Current-Mode Filtering TIA

• Published in: IEEE solid-state circuits letters Vol. 2; no. 9; pp. 183 - 186
• Main Authors: Pini, Giacomo, Manstretta, Danilo, Castello, Rinaldo
• Format: Journal Article
• Language: English
• Published: Piscataway IEEE 01-09-2019; The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
• Subjects: Bandwidth; Bandwidths; Broadband; Capacitance; CMOS; Filters; Frequencies; Impedance; Linearity; Low pass filters; mixer first; Mixers; mobile phones; Multiplication; Positive feedback; Power consumption; Radio frequency; Receivers
• ISSN: 2573-9603; 2573-9603
• DOI: 10.1109/LSSC.2019.2935573

A mixer-first wideband receiver with RF bandwidth of 260 MHz suitable for the 5G lower frequency band (below 6 GHz) is presented. The filtering trans-impedance amplifier immediately following the mixer is based on a regulated cascode, instead of a conventional shunt-feedback architecture. Thanks to a positive-feedback capacitance multiplication, third-order low-pass filtering in the current domain is performed. Wide bandwidth, high linearity, and low power are thus achieved. Measurements on a 28-nm CMOS chip prototype show alternate channel IIP3 and P1dB of +22 dBm and +3 dBm, respectively. RX NF is 5.5 dB while power consumption is 21.6 mW (signal path) and 7.8-mW/GHz (LO) with 1.8/1.2-V supply.