| 摘要 |
1530425 Keyboard SIEMENS AG 22 Feb 1977 [26 April 1976] 07347/77 Heading G4H A keyboard comprises a circuit board 1 having on one side first and second pluralities of parallel conductor paths 6, 7 and a further plurality N of pairs 3 of conductor paths, first and second paths constituting each pair each having a respective connection point for connection of the paths via connecting bridges 12, 13 to any selected ones of respectively the first and the second pluralities of conductor paths, to which end each path of 6, 7 has N connection points, one per pair; N key contact units 11 each connected to the paths of a respective pair; and in respect of each pair first and second connecting bridges 12, 13 respectively connecting the connection points of the paths of the pair to the respective connection point of a selected one of the first and a selected one of the second pluralities of paths, at least one of the bridges including a decoupling diode. |
