| 摘要 |
PURPOSE:To attain the level adjustment to each analog input amount at one location by providing a flying capacitor and an exclusive gain variable amplifier connected thereto to each input. CONSTITUTION:In selecting an input N1 for an anlog signal, the flying capacitor 1 corresponding to the input is actuated and the analog input N1 is selected by a multiplexer 5. Then, only one input is selected by the multiplexer 5 and the exclusive gain variable amplifier 2 corresponding to the flying capacitor 1 is connected to the output terminal 1 of the flying capacitor 1. Since the input level adjustment to one input is performed by this gain variable amplifier 2 in this way, the adjustment becomes easy. |
