A Baseband-Matching-Resistor Noise-Canceling Receiver Architecture to Increase In-Band Linearity Achieving 175MHz TIA Bandwidth with a 3-Stage Inverter-Only OpAmp

Abstract

In this paper we propose a baseband noise-canceling receiver architecture to increase in-band linearity. Key feature of the architecture is that all active circuits are in baseband, including the LNTA. The receiver targets high IF bandwidths, enabled by a TIA composed of an OpAmp using only inverters. The receiver is fabricated in 22nm FDSOI CMOS. Measured results show an in-band IIP3 of > 9dBm for an IF bandwidth of 175MHz with sub-5dB NF across 1-6GHz LO.

Low-Power High-Linearity Mixer-First Receiver Using Implicit Capacitive Stacking With 3× Voltage Gain

“…Please note that the in-band IIP3 of CSSC RX is still ∼10 dBm, and it increases to >20 dBm for f ≥ 2 × BW. Such large IIP3 implies that the linearity of subsequent baseband amplifiers will limit the overall IIP3 of the mixer-first RX at in-and transition-band frequencies, rather than the CSSC filter [8], [14]. Finally, the proposed CSSC filter achieves ∼4× narrower RF bandwidth than the CSC filter for given C R and R SW .…”

“…For example, the RX in [8] uses 50-mW I/Q BB-LNAs with a g m of 360 mS to achieve 2.3-dB NF, while the RX in [10] uses a 19.8-mW noise-canceling BB-LNA with a combined g m of 24 mS for 4-dB NF. As seen in the figure, the BB-LNAs are often used as trans-impedance amplifier (TIA) with shunt-feedback impedance either to realize 50 matching [4], [5] or virtual ground [14] at the baseband terminals of the mixer and achieve high in-band linearity. Recently, techniques with higher order impedance roll-off at the baseband terminals of mixer [8]- [13] have been proposed to improve the linearity of the receiver in the presence of nearby blockers.…”

“…Recently, techniques with higher order impedance roll-off at the baseband terminals of mixer [8]- [13] have been proposed to improve the linearity of the receiver in the presence of nearby blockers. Such linearity-enhancement techniques consume high power as they also require baseband amplifiers with large transconductance [8] and high loop gain [14], and, sometimes, auxiliary amplifiers [12], [13]. For example, the RX in [9] spends 21.6-mW power in a 1.8-V I/Q TIA, while the RX in [12] burns 143 mW of power in BB-LNAs and auxiliary amplifiers to realize 40-dB roll-off at the mixer output.…”

6.5 A 3dB-NF 160MHz-RF-BW Blocker-Tolerant Receiver with Third-Order Filtering for 5G NR Applications

“…Moreover, as the input impedance (Zin) of the baseband TIAs should satisfy the input matching, the RX IB linearity is eventually limited by the signal swing at TIA's input. Adding an auxiliary noise-canceling path alleviates this issue [3], at the cost of ~2x larger PDC as the number of wideband TIAs is doubled. Furthermore, LO consumes a considerable power to drive large mixer switches as their on-resistance (Rsw) noise cannot be canceled.…”

A Baseband-Matching-Resistor Noise-Canceling Receiver With a Three-Stage Inverter-Only OpAmp for High In-Band IIP3 and Wide IF Applications

“…[10], (b) [2], (c) [12] , and (d) [13] for comparing their in-band linearity along with noise, matching, and OoB linearity performances In [14], we proposed a Base Band Noise Canceling (BBNC) receiver architecture targeting both high in-band linearity and high IF-bandwidth without compromising on other performances such as NF, OoB linearity, and input matching. Compared to [14], in this paper we provide a more detailed analysis of the various properties of the architecture, as well as more mathematical analysis and design guidelines. We also provide analysis and design guidelines for the 7.6GHz unity gain bandwidth (UGB) 3-stage inverter-only OpAmp.…”