| 摘要 |
PURPOSE:To improve the operability by indicating an ON/OFF state of all electronic sounds and voices with two ON/OFF marks. CONSTITUTION:Input signals from an ON/OFF switch are fed to flip flops 3 and 4 through a control circuit 2 to change the combination of Q1 and Q2. Signals from the flip flops 3 and 4 are sent to a decoder 5 which selects turning ON or OFF of an alarm sound synchesization circuit 6 and a voice synthesization circuit 7. When these circuits are ON, in response to a sound emission instruction signal transmitted to the alarm sound synthesization circuit 6 or the voice synthesization circuit 7 from the control circuit 2, a signal sound or signal voice is emitted from a sepaker through an amplifier 8. The Q1 and Q2 are sent to a display 10. Q1 determines ON/OFF selection of an alarm mark while Q2 does ON/OFF selection of a speak mark. |
