Gregory J. Manlove

A fully integrated high-performance FM stereo decoder

A custom FM stereo decoder IC which uses switched-capacitor and linear filters, linear MOS and bipolar circuitry, and digital MOS circuitry to eliminate the requirements for accurate external components and external adjustments is described. The IC includes a combined analog/digital VCO and PLL, a switched-capacitor sine-wave multiplier, and a switched-capacitor pilot detector and cancellation stage. An output S/N ratio greater than 80 dB and output distortion less than 0.1% have been achieved. The part is 26000 mils/sup 2/ and is implemented in a 3 mu m n-well CMOS process containing poly-to-poly capacitors, n-p-ns, and ion-implanted poly resistors. >

A Sensor for Crash Severity and Side Impact Detection

This paper describes a crash detection sensor developed for use in two difficult crash discrimination situations: side impact and crash severity sensing. By changing the calibration of the unit during manufacturing, the unit can function as either a side or frontal impact sensor. Furthermore, the sensor can characterize the severity of the crash event and pass the information to a central restraint system control module. The entire sensor, which is composed of a micromachined accelerometer, a custom integrated circuit, and a microprocessor, is contained in a small, rugged module that is designed to be mounted near the impact zone.