Abstract: An input sensing unit includes a touch sensing unit, which includes a plurality of driving electrodes, a plurality of sensing electrodes, and a driving signal generating unit which provides driving signals to the driving electrodes. The sensing electrodes are insulated from and intersect the driving electrodes. The driving signal generating unit includes touch drivers connected to driving electrodes and a digital-to-analog converter configured to provide a first signal or a second signal, and each of the touch drivers is connected to a preset number of driving electrodes among the driving electrodes.

Abstract: An impedance matching circuit for a set-top box includes a diplexer at a preceding stage having a given output impedance, and a network interface having a given input impedance different from the output impedance of the diplexer. The impedance matching circuit is connected between the diplexer and the network interface, and matches the output impedance of the diplexer to the input impedance of the network interface. Further, the impedance matching circuit includes a transformer having a primary coil and a secondary coil connected to the network interface, a first resistor for connecting an output end of the diplexer to an end of the primary coil of the transformer, a second resistor for connecting another output end of the diplexer to another end of the primary coil of the transformer, and a third resistor connected in parallel with the primary coil of the transformer.