| 摘要 |
PURPOSE:To attain a circuit for binary signal outputs in 2-bit through a ternary switching input signal, with a simple constitution and ease of setting of a voltage source, by constituting a specific circuit with one differential amplifying circuit and three detection circuits. CONSTITUTION:A constant voltage source Va is connected to two input terminals of a differential amplifying circuit 5 via resistors R1 and R2 respectively, said 2nd input terminal is taken as a ternary switching input terminal 4 and given with a specified level via a switch, e.g. SW1. The 1st and 2nd outputs 2, 3 of the circuit 5 are respectively connected with the 1st and 2nd detection circuits 6, 7, the input to the 3rd detection circuit 8 is connected to the source Va and its output is connected to one of the outputs of the circuits 6, 7. Then, a binary signal corresponding to a prescribed level, e.g. L.H level at the position A of the SW1, H.H at the position B, and L.L at the position C, can be obtained in an output 2-bit of the circuits 6 and 7. |
