| 摘要 |
PURPOSE:To obtain an automatically correctable analogue input circuit, by providing a common transformer which has a primary winding for multichannel input signals, a winding for correction signal input, and an output winding. CONSTITUTION:An input transformer 11 has a primary winding for input signals to which an input circuit including input switching FETs 1a, 1b-na, and nb for input signals 1-n of plural channels is connected, a primary winding to which a correcting false signal input circuit 12 is connected, and a secondary winding to which an amplifier 5 and etc. are connected. By sending a control signal from a control circuit 10 to a pulse transformer 3 through a control line 101, FETs 1a and 1b are turned on successively to take in a pulse signal corresponding to the input analogue signal, and the pulse signal is subjected to A/D conversion to obtain input data. |
