| 摘要 |
A switcher for connecting one of a plurality of input terminals to a subset of output terminals comprises first and second circuit boards (100) each comprising a substrate (102) and at least one switch module (90-96). Each switch module has a plurality of signal in terminals (48), a plurality of signal out terminals (50), and a plurality of input expansion terminals (52), and is operative to connect any selected signal in terminal to any selected subset of signal out terminals and to connect any input expansion terminal selectively to a corresponding signal out terminal. The signal in terminals of the modules of the first and second circuit boards are coupled to respective input terminals of the switcher. The signal out terminals of the switch module of the first circuit board are coupled to the input expansion terminals of the switch module of the second circuit board, and the signal out terminals of the switch module of the second circuit board are coupled to respective output terminals of the switcher. |
