digitally-controlled ring oscillator (RO)

A 300-μW BLE-Compliant Packet-Based Data-Agnostic Clock-Harvesting RX Achieving −85/−70 dBm Sensitivity for ±40/±15 ppm Accuracy

A 300-μW BLE-Compliant Packet-Based Data-Agnostic Clock-Harvesting RX Achieving −85/−70 dBm Sensitivity for ±40/±15 ppm Accuracy 150 150

Abstract:

An ultralow-power Bluetooth low energy (BLE)-compliant crystal-less clock-harvesting receiver is presented that uses the BLE advertising packets (APs) to calibrate an on-chip frequency reference with ±400 ppm initial frequency offset. The proposed front-end, fabricated in 22 nm FDSOI, is capable of pushing the frequency accuracy of the reference further to below ±40/±15 …

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