Patent ID: 8482676
Filing Date: 2013-07-09
Classification: G06F,H01Q,H03H,H03J,H04B,H04N

Abstract:
1. A control system of a digital television (TV) receiving a digital TV bandwidth, comprising: a differential antenna receiving broadcasting signal and generating a differential radio frequency (RF) signal including a positive signal and a negative signal; a control unit generating a selecting signal according to a selected channel; and a switch circuit including a plurality of matching circuits and a switch control circuit, wherein each of the matching circuits optimizes part of the digital TV bandwidth, the switch control circuit receives the selecting signal to control that an optimized positive signal is generated to the control unit after the positive signal passes through a first matching circuit of the matching circuits and an optimized negative signal is generated to the control unit after the negative signal passes through a second matching circuit of the matching circuits, the first matching circuit and the second matching circuit optimize the same bandwidth, the optimized positive signal and the optimized negative signal are a differential optimized signal, and the control unit receives the differential optimized signal and converts the differential optimized signal to a selected channel signal.