Abstract: Combination line/microphone input circuitry is provided that adapts to receive either an audio line input or a microphone input via a single dual-purpose compound plug or input. More particularly, a combination line/microphone input circuit is provided to accept two different types of audio signals, being audio line signals and microphone signals, via a single dual-purpose plug or single input, such that the audio input circuitry is controlled or switched to accept either the audio line input or the audio microphone input signals, appropriately attenuate, filter and/or such input signals as necessary, then provide the resulting signal to other audio circuitry. Embodiments of the invention include additional circuitry that helps protect external line signal producing electronics from receiving incorrectly activated phantom microphone voltage.

Abstract: An embodiment of a display apparatus includes a display panel having at least one segment line, at least one common line, and at least one display element coupled between the at least one segment line and the at least one common line. The display apparatus further includes a first segment driver circuit having at least one first segment driver coupled to a first end of the at least one segment line, and a second segment driver circuit having at least one second segment driver coupled to a second end of the at least one segment line. The display apparatus further includes a first common driver circuit having at least one first common driver coupled to a first end of the at least one common line, and a second common driver circuit having at least one second common driver coupled to a second end of the at least one common line.