A 2.4-GHz Super-Regenerative Transceiver With Selectivity-Improving Dual Q-Enhancement Architecture and 102- $\mu \text{W}$ All-Digital FLL

A multichannel super-regenerative transceiver with a selectivity-improving dual Q-enhancement architecture and a 102-μW all-digital frequency-locked loop (FLL) is presented for bio-signal sensor nodes covering the 2.36-2.4-GHz medical band and 2.4-GHz industrial-scientic-medical (ISM) band. The conventional super-regenerative receiver suffers from the weak selectivity, and its performance is deter...