Patent ID: 7609127
Filing Date: 2009-10-27
Classification: H03K,H04N

Abstract:
1. A switch circuit comprising: at least two input terminals and one output terminal, first switches, each first switch comprising a first and second port, each first switch being electronically switchable between a first state, wherein the first port is disconnected from the second port, and a second state, wherein the first port is connected to the second port, wherein each of the input terminals is connected to a first port of a respective one of said first switches, and a second switch with at least two branch ports and a common port coupled to said output terminal, said second switch electronically switchable between different states, wherein in each state a respective branch port of the at least two branch ports is connected to the common port and the remainder of the at least two branch ports are disconnected from the common port, wherein each of the branch ports is connected to a second port of a corresponding one of said first switches; wherein the first switches are configured so that all of the first switches are not in the first state simultaneously, wherein one of the at least two input terminals is connected to a terrestrial TV antenna and another of the at least two input terminals is connected to a TV cable network, wherein one of the first switches receives a first TV signal from the terrestrial TV antenna and another of the first switches receives a second TV signal from the TV cable network.