Audio-detector alarm

Auto-calibrated D-A converter

Auto-polarity dual ramp analog to digital converter

Autocalibration of compressed A/D converter

Automated calibration and standardization apparatus

Automatic bias adjustment circuit for a successive ranged analog

Automatic control device for cameras

Automatic digital gain ranging system

Automatic gain controlled amplifier apparatus

Automatic offset compensating bipolar A/D converter circuit

Automatic polarity sensing analog-to-digital converter

Automatic siren silencing device for false alarms

Automatically relegendable keyboard

Automatically sequenced signaling system

Automotive vehicle tone generator