Capacitive Sensor Interface Using an Inverter-Based Period Modulator

This thesis discusses the basic principles, circuit implementation and measurements of an inverter-based capacitive-sensor interface based on period modulation. The interface employs an inverter-based OTA and comparator to increase the current efficiency. Moreover, it applies new circuit techniques to reduce the die size and to reduce noise. A...

Energy-Efficient Self-Timed Zero-Crossing-Based Incremental Delta-Sigma ADC

Power Management for Portable Devices