The tutorial will start from the first principles and cover the single and multi-stage CMOS RF to DC rectifier design, efficiency, the simulation methodology and the measurement methods for the chip input impedance — a prerequisite for the design of the optimum tag antenna.
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- The requirements for RF energy harvesting circuits
- RF Rectifier Circuits
- Diode-C Rectifier Rectifier
- Diode-connected MOSFET-C rectifier circuit
- Differential-drive CMOS rectifier circuit
- Power Conversion efficiency (PCE) and output voltage of CMOS Rectifier
- Design of Multi-stage (cascaded) CMOS rectifier circuits.
- Selection of the number of stages in a rectifier block.
- Avenues for further optimization of CMOS rectifier circuits.
- Rectifier Input Impedance of Simulation and Measurement
- The need for determination of the input impedance of the rectifiers
- Inadequacy of the conventional small-signal analysis and simulations
- The simulation methods
- Transient Simulation methods
- Shooting-Newton type simulations
- The determination of the actual RF input power from simulations
- The characteristics of the input current/voltage in time and frequency domains
- Quick and accurate testbench measurement of the input impedance
- Optimization of the input impedance of the RF rectifiers.