| 摘要 |
1,119,000. Electric selective signalling. INTERNATIONAL BUSINESS MACHINES CORP. 21 Dec., 1966 [20 Jan., 1966], No. 57196/66. Heading G4H. [Also in Division H4] A tree decoder comprising switching elements 72-100 as shown is controlled by a four-element signal, each element having one of three levels. Each element controls the corresponding switching elements to select one or other or both of the associated paths, so selecting one or more of the sixteen outputs. Switch 104 passes a voltage of chosen level to the selected outputs.
|
