We describe a polarization-selective beam splitter by a sandwiched grating, which can fulfill the high efficiency element for TE polarization and the two-port output for TM polarization. The modal method and the rigorous coupled-wave analysis (RCWA) are employed together to optimize the polarization-selective beam splitter. According to the modal method, the grating duty cycle and period are di...

Acoustics and vibrations caused on machine structures can result in faulty or collapse of the whole mechanical system. These acoustics produced by machinery are vital indicators of machine health. Acoustic signals analysis can be used as a tool for locating the problem and thus taking necessary actions. MEMS sensors provide high accurate low size and low cost microphones which can be even used ...

With the development of intelligent machine tools, monitoring the vibration by the accelerometer is an important issue. Accelerometers used for measuring vibration signals during milling processes require the characteristics of high sensitivity, high resolution, and high bandwidth. A commonly used accelerometer is the lead zirconate titanate (PZT) type; however, integrating it into intelligent ...

The requirements, features, and implementation of the port interface unit for the Lutonium asynchronous microcontroller are covered in detail. The Lutonium is a new microcontroller that is pin-and software compatible with the Intel 8051 family of microcontrollers, and it is being designed by the Caltech Asynchronous VLSI Group. The port interface unit controls five 8-bit I/O ports, exposing the...

An important design consideration in the development of two-port resonant sensors is the electrical cross-talk between the input port and the output port. The overall transfer function if(jo) of the two-port sensor is equal to the vectorial sum of a transfer function representing the mechanical behavior and a transfer function representing the electrical cross-talk. The resonant silicon beam fo...