| Autor: |
Moosavifar, Milad, Im, Jaeho, Wentzloff, David D. |
| Zdroj: |
IEEE Journal of Solid-State Circuits; February 2024, Vol. 59 Issue: 2 p337-348, 12p |
| Abstrakt: |
In this article, we present a blocker-tolerant ultralow-power (ULP) receiver (RX) operating at the 430-MHz industrial, scientific, and medical (ISM) band for Internet of Things (IoT) applications, which leverages a chirp modulation scheme to achieve high blocker tolerance. The presented RX simultaneously achieves ULP consumption, high RX sensitivity, and enhanced in-band (IB) and out-of-band (OOB) interference tolerance. This is enabled by a unique dual-chirp ON–OFF-keying (DC-OOK) modulation scheme in conjunction with several architecture and circuit-level techniques, including bit-level duty-cycling and cost-/energy-efficient high- ${Q}$ radiofrequency (RF) amplifiers. As a result, this RX offers high channel selectivity and good immunity to interference without the need for OFF-chip high- ${Q}$ surface acoustic wave (SAW) and BAW filters or high-power active filters. The RX prototype was designed and fabricated in a bulk CMOS 28-nm process and achieves − 103 dBm sensitivity for bit error rate (BER) < 10 $^{-{3}}$ while rejecting amplitude-modulated blockers as strong as 41 dBc at a 10-MHz frequency offset. The RX operates at 2.5-kb/s data rate and consumes 110- $\mu \text{W}$ average dc power. |
| Databáze: |
Supplemental Index |
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