| 摘要 |
<p>PURPOSE:To simplifity a switching mechanism by providing a non-lock switch for jump music selection and a plunger driving transistor to which control voltage is given by the switch signal. CONSTITUTION:A non-lock switch SW is provided between a base of transistor Q1 that applies driving current to a coil L constituting a plunger driver that performs fast forwarding rewinding reproduction and a power source voltage Vcc The base of Q1 is connected to the outer terminal T1 of a monolithic IC that constitutes a controlling circuit. On the other hand, a plunger controlling circuit formed in the molithic IC is made up of a transistor Q2 etc. connected to the outer terminal T1 through resistance R2. When the number of jumped musics is not 0, jump information (a) is made to a low level, and when it is 0, made to a high level. By this way, a non-lock switch can be utilized as a switch for jump music selection and accordingly, the switch mechanism can be simplified.</p> |
