30.5 A 0.5V BLE Transceiver with a 1.9mW RX Achieving −96.4dBm Sensitivity and 4.1dB Adjacent Channel Rejection at 1MHz Offset in 22nm FDSOI

Abstract

Towards the emerging AI era, IoT is becoming more important. Current IoT wireless nodes require replacement or recharging of the battery. This is impractical when a massive number of nodes are connected to the network. Ultra-low-voltage wireless connectivity that can operate with power supplied from energy harvesters, for example 0.5V from solar cells, is necessary [1]. BLE is a good candidate, but a high blocker resilience in the 2.4GHz ISM band is required even though the BLE specifications are not strict compared to other standards. It is a challenge to design RX circuits at low voltage without sacrificing performance, especially blocker resilience and sensitivity.