ABSTRACT
In recent years, the proliferation of short-range wireless applications for Internet of Things and personal healthcare calls for ultralow-power and ultralow-cost CMOS radios [1]. Ultralow-voltage (ULV) designs have been one of the key directions to approach a better power efficiency [2-5]. Regrettably, an ULV supply will limit the voltage swing, and device’s fT and overdrives, deteriorating the spurious-free dynamic range (SFDR) while necessitating area-hungry inductors (or transformers) to assist the bias and tune out the parasitic capacitances. This chapter describes the design and implementation of a compact, low-power, and high-SFDR receiver
15.1 Introduction ..................................................................................................403 15.2 Proposed “Split-LNTA + 50% LO” Receiver...............................................405 15.3 Comparison of “Split-LNTA + 50% LO” and “Single-LNTA + 25%
LO” Architectures ........................................................................................406 15.3.1 Gain ..................................................................................................406 15.3.2 NF .....................................................................................................409 15.3.3 IIP3 ................................................................................................... 410 15.3.4 Current-and Voltage-Mode Operations ........................................... 411
15.4 Circuit Techniques ........................................................................................ 412 15.4.1 Impedance Upconversion Matching ................................................. 412 15.4.2 Mixer-TIA Interface Biased for Impedance Transfer Filtering ....... 413 15.4.3 RC-CR Network and VCO Codesign ............................................... 415
15.5 Experimental Results .................................................................................... 418 15.6 Conclusions and Future Developments ......................................................... 421 Acknowledgment ................................................................................................... 423 References .............................................................................................................. 423
suitable for ZigBee or wireless personal area network (WPAN) applications. The research background is outlined as follows.
