公开(公告)号：US6064538A

公开(公告)日：2000-05-16

申请号：US24771

申请日：1998-02-17

申请人： Yoshio Higuchii

发明人： Yoshio Higuchii

IPC分类号： G11B5/008 ,  G11B5/024 ,  G11B5/03

CPC分类号： G11B5/0086 ,  G11B5/024 ,  G11B5/03

摘要： A biasing/erasing oscillator includes a series circuit formed by an entire-width erasing head, a linear record erasing head and an inductor. The series circuit is connected in parallel with an oscillating capacitor to form an LC resonant circuit. The LC resonant circuit is connected to a base of a transistor through a direct current blocking capacitor. The transistor has an emitter is connected to a series junction point, for example, between a sound erasing head and the inductor. A collector of the transistor is supplied with a bias voltage, while the transistor base is supplied with a bias current through a bias resistor. The direct current blocking capacitor prevents the bias current from flowing into the LC resonant circuit.

摘要翻译： 偏置/擦除振荡器包括由全宽擦除头，线性记录擦除头和电感器形成的串联电路。 串联电路与振荡电容并联连接，形成LC谐振电路。 LC谐振电路通过直流阻塞电容器连接到晶体管的基极。 晶体管的发射极连接到例如声音擦除头和电感之间的串联连接点。 晶体管的集电极被提供偏置电压，而晶体管基极通过偏置电阻器提供偏置电流。 直流阻塞电容器防止偏置电流流入LC谐振电路。