CMOS Circuit Design for RF Sensors

Contents: I. Introduction. II. Link design: 1. Circuit-level link description. 2. Electromagnetic view. 3. Coil design. 4. Transmitter design. III. Receivers: 1. Requirements. 2. Basic single-ended receiver. 3. Low-power ASK demodulator. IV. Power supply management: 1. Shunt regulator. 2. Rectifiers. 3. Internal linear regulators. 4. Supply quality.  5. Reference circuits: 1. Bandgap references. 2. Bias signal generation. 3. Reset circuits. V. Case studies: 1. Stimulator chip. 2. Two-chip system, transceiver. Conclusion. Bibliography.

"CMOS Circuit Design for RF Sensors is about CMOS circuit design for sensors and actuators to be used in wireless RF systems. The main application is implantable transducers for biomedical purposes, such as sensing of nerve signals, and electrical stimulation of nerves. Special focus is put on the power and data link in a wireless system with transducers which are powered via an RF link. Novel principles and methods are presented for the regulation of power to the sensors and for the distribution of data and power in an implanted transducer system. One of the main problems in such systems is the transmission of power via an RF link. This problem is analyzed in detail and solutions incorporating an RF magnetic link to the transducers are identified. The theoretical results are supported by experimental results from CMOS chips, including a system chip for Functional Electrical Stimulation (FES). The work shows that a System on Chip (SoC) solution is feasible using CMOS technology for the RF sensors. The only components which cannot be integrated on the chip are the antenna coil and a capacitor for energy storage.

CMOS Circuit Design for RF Sensors will be useful reference for academics as well as research scientists who are active in the field of analog circuit design and sensors."