Ultralow-Power Receivers: Overcoming Battery Limitations to Facilitate Self-Powered Operation

Wentzloff, David D.; Alghaihab, Abdullah; Im, Jaeho; Abdelatty, Omar; Odelberg, Trevor J.

doi:10.1109/mssc.2021.3088967

Cited by 8 publications

(13 citation statements)

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“…Direct-conversion receivers are used in low-power consumption applications because they eliminate the need for low-noise amplifier (LNA) blocks and local oscillators (LO) Radio Frequency (RF), which are present in the tuned RF receiver and mixer-first receiver architectures [5,3,2,1]. Both the LNA and oscillators increase power consumption [5,1]. In direct conversion receivers, the first stage consists of an envelope detector.…”

Section: Low-power Receiversmentioning

confidence: 99%

“…Passive envelope detectors are attractive in applications with low energy consumption, as they allow for lower power consumption and good efficiency A Low-Power Direct-Conversion Receiver with Improved Sensitivity using AC-Coupled in applications with a data rate of less than 1 KB/s [5]. However, this detectortype adds a significant amount of noise to the circuit, due to the presence of harmonics and DC levels [1]. For this reason, a filtering stage and later baseband amplification are needed [1].…”

Section: Low-power Receiversmentioning

confidence: 99%

“…However, this detectortype adds a significant amount of noise to the circuit, due to the presence of harmonics and DC levels [1]. For this reason, a filtering stage and later baseband amplification are needed [1].…”

Section: Low-power Receiversmentioning

confidence: 99%

“…After the detection and passive filtering stages, a baseband amplification stage is required to limit the operating frequency range, maintain the minimum power [1], and improve sensitivity. Figure 4 shows the architecture of the baseband amplifier evaluated in this work.…”

Section: Ac-coupled Amplifiermentioning

confidence: 99%

“…Currently, there is increasing interest in developing portable devices with low-power consumption. Applications where these features are attractive include Internet of Things systems, where, according to [1], most of the power is consumed in wireless communication systems. Other applications cited in the literature are the use of smart sensors, wireless sensor networks, wearable devices, and health care monitoring systems [2,3,4].…”

Section: Introductionmentioning

confidence: 99%

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A Low-Power Direct-Conversion Receiver with Improved Sensitivity using AC-Coupled Baseband Amplifier in 130 and 180 nm CMOS Technologies

Oliveira

Brito-Filho

2023

Preprint

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This paper evaluates the use of an AC-coupled amplifier as a base-band amplifier for a direct conversion receiver. Due to the importance oflow-power consumption circuits for modern applications, a passive-typeenvelope detector was used to perform the downconversion of the radiofrequency signal while the baseband amplifier improves the sensitivity.The circuits were designed and simulated using CMOS SkyWater 130nm and UMC 180 nm technologies. Open-source end-to-end ASIC designflow was used to obtain results to SkyWater technology. For both tech-nologies the results of each stage are presented, as well as a sensitivitycomparison for the envelope detector, and the sensitivity with the use ofthe amplifier. The power-consumption of the AC-coupled amplifier forSkyWater 130 nm was 1.8 μA and for UMC 180 nm was 0.9 μW . At theoperating frequency of 2.45 GHz, the receiver achieves a sensitivity of−58.5 dBm and −61.88 dBm for UMC and SkyWater technologies,respectively. The results are within the expectations and presented in theliterature. The AC coupled amplifier performs well as a baseband ampli-fier for a direct conversion receiver, improving sensitivity, amplifyingthe baseband signal in addition to adding low power consumption.

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