公开(公告)号：US07019947B2

公开(公告)日：2006-03-28

申请号：US10671466

申请日：2003-09-29

申请人： Yong-Chae Jeong

发明人： Yong-Chae Jeong

IPC分类号： G11B15/60

CPC分类号： G11B15/1833 ,  G11B5/53 ,  G11B5/531 ,  G11B5/534

摘要： In a head drum assembly mounting structure on a deck of a tape recorder, a plurality of connecting holes and positioning holes are formed in a drum boss provided at a lower portion of a fixing drum, and a plurality of coupling holes and positioning pins are formed in a drum base which is slant disposed on a main base. By using the positioning holes and the positioning pins as positioning means which are connected to each other in complementary fashion, the coupling holes of the drum base and the connecting holes of the drum boss are aligned with each other, and by fastening a screw into such aligned coupling holes and the connecting holes, the head drum assembly can be directly coupled to the main base while being slant disposed with respect to the main base. Accordingly, any possible damage to a lead line is prevented, and assembly efficiency is improved, while the number of parts and the manufacturing cost are reduced.

摘要翻译： 在磁带记录仪的台面上的磁头鼓组件安装结构中，多个连接孔和定位孔形成在设置在定影鼓的下部的鼓轮毂中，并且形成多个连接孔和定位销 在倾斜设置在主基座上的鼓座中。 通过使用定位孔和定位销作为彼此互补连接的定位装置，鼓座的联接孔和鼓凸台的连接孔彼此对准，并且通过将螺钉紧固在这样的位置 对准的联接孔和连接孔，头鼓组件可以相对于主底座倾斜设置而直接联接到主基座。 因此，防止对导线的任何可能的损坏，并且提高组装效率，同时减少零件数量和制造成本。

公开(公告)号：US5969572A

公开(公告)日：1999-10-19

申请号：US17347

申请日：1998-02-02

申请人： Yong-Chae Jeong ,  Young Kim ,  Ik-Soo Chang

发明人： Yong-Chae Jeong ,  Young Kim ,  Ik-Soo Chang

IPC分类号： H04B1/62 ,  H03F1/32 ,  H03F1/26 ,  H03F1/00

CPC分类号： H03F1/3229

摘要： A feedforward-type linear power amplifier directly compares amplitude and phase of a signal applied to one input end of a first signal canceler with amplitude and phase of a signal applied to another input end of the first signal canceler, and according to the comparison results, controls a first variable attenuator and a first variable phase shifter disposed in a pre-stage of the first signal canceler so that the first signal canceler extracts only the intermodulation distortion signals generated while a main power amplifier amplifies the RF input signal. Then, the linear power amplifier directly compares amplitude and phase of the intermodulation distortion signal on a main path with amplitude and phase of the intermodulation distortion signal on a sub path, and according thereto, controls a third variable attenuator and a third variable phase shifter to cancel the intermodulation distortion signals contained in the RF output signal of the main power amplifier.

摘要翻译： 前馈型线性功率放大器直接对施加到第一信号消除器的一个输入端的信号的幅度和相位与施加到第一信号消除器的另一输入端的信号的幅度和相位进行比较，并且根据比较结果， 控制第一可变衰减器和设置在第一信号消除器的前级的第一可变移相器，使得第一信号消除器仅提取当主功率放大器放大RF输入信号时产生的互调失真信号。 然后，线性功率放大器直接将主路上的互调失真信号的幅度和相位与子路径上的互调失真信号的幅度和相位进行比较，并且根据该功率控制第三可变衰减器和第三可变移相器 消除主功率放大器的RF输出信号中包含的互调失真信号。