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1. 发明公开

EP1054510A2 High frequency tuned amplifier used as a buffer circuit 有权
标题翻译： Als Pufferschaltung angewandter abgestimmterVerstärker
公开(公告)号：EP1054510A2
公开(公告)日：2000-11-22
申请号：EP00303919.5
申请日：2000-05-10
申请人： ALPS ELECTRIC CO., LTD.
发明人： Nakano, Kazuhiro, c/o Alps Electric Co., Ltd. , Noumi, Hiroki, c/o Alps Electric Co., Ltd.
IPC分类号： H03J5/24
CPC分类号： H03J5/242 , H03F3/191 , H03F2200/111 , H03F2200/417
摘要： The high frequency tuning amplifier (3) for buffer has a tuning circuit (8) consisting of a serial circuit of the first (20) and second (21) inductors connected between the output of transistor amplifying stage and the power source, a first capacitor (22) connected in parallel to the serial circuit of first and second inductors, a serial circuit of the second (23) and third (24) capacitors connected in parallel to the second inductor and a switching element (26) to which a band switch voltage is supplied, connected between the connecting point of the second and third capacitors and the reference voltage point. The turning circuit is turned to the high band frequency when the switching element is turned ON and to the low band frequency when the switching element is turned OFF.
摘要翻译：用于缓冲器的高频调谐放大器（3）具有由连接在晶体管放大级的输出端与电源之间的第一（20）和第二（21）电感器的串联电路组成的调谐电路（8），第一电容器（22）并联连接到第一和第二电感器的串联电路，并联连接到第二电感器的第二（23）和第三（24）电容器的串联电路和一个开关元件（26），频带开关电压被提供，连接在第二和第三电容器的连接点和参考电压点之间。当开关元件接通时，转向电路转为高频带频率，当开关元件断开时转向低频带频率。

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