Helmut Theiler

Optical proximity sensing with reduced pixel distortion

Optical proximity sensing with reduced pixel distortion

Interface circuits and communication system for coupling a host device to an accessory device and method for communication between such devices

Headphones, audio device, audio system and method for transmitting signals

Host interface, accessory interface and method for managing a connection between a host interface and an accessory device

Host communication circuit, client communication circuit, communication system and communication method

Controlled power supply circuit

Voltage supply arrangement and method for supplying voltage to an electrical load with transistor saturation control

Headphones, audio device, audio system and method for transmitting signals

Circuit arrangement and method for active noise cancellation

Control loop arrangement, circuit arrangement and method of regulating a load-coupled current source and the supply voltage therefor

Active noise control arrangement, active noise control headphone and calibration method

Output stage system

Circuit array

Digital-to-analog converter comprising an integrated test circuit