This book explores the design of ultra-low-power radio-frequency integrated circuits (RFICs), with communication distances ranging from a few centimeters to a few meters. The authors describe leading-edge techniques to achieve ultra-low-power communication over short-range links. Many different applications are covered, ranging from body-area networks to transcutaneous implant communications and smart-appliance sensor networks. Various design techniques are explained to facilitate each of these applications.TRX. Figure 22 shows the overall architecture of the double-FSK transceiver. The HBC uses a 40a120 MHz frequency band for the data transmission while the contact impedance sensing (CIS) circuit utilizes a chopper-stabilized AC current- injection source of 1.25 MHz to monitor the differential contact impedance between contact electrode and the human body. CIS also adjusts noise figure, inputanbsp;...
|Title||:||Ultra-Low-Power Short-Range Radios|
|Author||:||Patrick P. Mercier, Anantha P. Chandrakasan|
|Publisher||:||Springer - 2015-07-21|