| 摘要 |
PURPOSE:To decrease the ratio of the display driving circuit and to simplify the circuit, by using an exclusive OR circuit or an exclusive NOR circuit as the display multiplex driving circuit. CONSTITUTION:An input signal 1 is transmitted to an output 3, by opening the gate of a clocked inverter 12 and inverting the phase of the input signal 1, when an input signal 2 is at positive level. In this case, a transmission gate 15 is kept closing and the output side keeps high impedance. Next, when an input signal 2 is at negative level, the gate of the clocked inverter 12 is closed and the output side is a high impedance, and instead, the transmission gate 15 is open and the input signal 1 is transmitted in-phase to the output 3. |
