Cooking unit

Abstract

Abstract PURPOSE:To save an electrical energy, extend a life of electrical component elements, prevent a speaker noise during non-voice period and prevent a generation of shock sound when an energization of the part relating to the voice output is turned on or off by a method wherein the part relating a voice output of a voice synthesizing device is energized during only a specific period in which a voice output is to be fed out and the energization for the remaining period is turned off. CONSTITUTION:In a control part, an energization control signal PWR is kept at a high level when the voice output is not required. Thereby, the transistor Q1 is turned off, a supplying of electrical power to a voice synthesizing device 5 and an amplifier 6 is turned off. In turn, a transistor 86 is turned on and a series connected circuit of capacitor 62 and resistor 63 is kept in its short circuited condition. Thus, a terminal 61f is drawn to a ground level and another input terminal 61e of the differential amplifier 61d is also pseudically drawn at a low level. Thus, a gain of the amplifier 6 is kept at a quite low condition. Even in the case that a shock signal is fed to the input terminal 61e of the amplifier 6 due to some reasons when the supplying of electrical power is switched, no shock sound is produced from the speaker 7.

Inventors

• 👤 Hideaki Koyama
• 👤 英明 小山

Bibliographic Details