Abstract: An active noise control arrangement has a signal input (SI), a microphone input (MI), a signal output (SO) and a digital interface (DI). A signal processing block (SP) coupled to the microphone input (MI) by means of an amplifier (MA) has a digitally adjustable gain and comprises combining means (CM) and a filter (TP). The signal processing block (SP) is configured to generate an output signal at the signal output (SO) as a function of an input signal at the signal input (SI) and an amplified microphone signal. A control block (CB) is coupled to the digital interface (DI) and configured to adjust the gain of the amplifier (MA).

Abstract: An optical scanner device is provided in PCMCIA format for transparent image bearing media (slides or film). The light sensor (420) includes a single photosensitive element, a photodiode, close to the media (415) being scanned; the sensor (420) and the media (415) are relatively movable one in respect of the other in at least two directions, successively acquiring data representing each pixel one at a time. The source light (405) is implemented as a small block of four LEDs (red, green, blue and infrared), including a plexiglass diffuser (410), and it is moved concurrently with the sensor (420). The sensor (420) and the light source (405) can be moved at different selected speeds, providing a scanner with different selectable resolutions.