Wireless communication apparatus
    4.
    发明授权
    Wireless communication apparatus 有权
    无线通信装置

    公开(公告)号:US07184491B2

    公开(公告)日:2007-02-27

    申请号:US10655045

    申请日:2003-09-05

    IPC分类号: H04K1/02

    摘要: A linear system and an EER system are used in combination such that the EER system can also be used in a cellular phone with a wide output dynamic range. In the EER system, linear control of an amplifier becomes difficult in a low output range. Thus, use of the EER system is limited to a high output range, and the linear system is used in the low output range as in the past. A power efficiency is improved while requirements of linearity are satisfied by this structure. An effective circuit structure is proposed for a switching control system for two systems. In addition, an up-converter is constituted in combination with a step-down element with high responsiveness, whereby a power supply voltage control circuit for the EER system with a wide control range and high responsiveness is provided.

    摘要翻译: 线性系统和EER系统组合使用,使得EER系统也可以用在具有宽输出动态范围的蜂窝电话中。 在EER系统中,放大器的线性控制在低输出范围内变得困难。 因此,EER系统的使用被限制在高输出范围,并且线性系统如以往那样在低输出范围内使用。 通过这种结构满足线性要求,提高了功率效率。 提出了一种用于两个系统的开关控制系统的有效电路结构。 此外,上变频器与具有高响应性的降压元件组合构成,由此提供了具有宽控制范围和高响应性的EER系统的电源电压控制电路。

    Method of manufacturing semiconductor device
    7.
    发明授权
    Method of manufacturing semiconductor device 失效
    制造半导体器件的方法

    公开(公告)号:US06881639B2

    公开(公告)日:2005-04-19

    申请号:US10372774

    申请日:2003-02-26

    摘要: The present invention provides a method of manufacturing semiconductor devices, by which InGaAs-base C-top HBTs are manufactured at low cost. Helium ions with a smaller radius are implanted into a p-type InGaAs layer (in external base regions) not covered with a lamination consisting of an undoped InGaAs spacer layer, n-type InP collector layer, n-type InGaAs cap layer, and collector electrode from a direction vertical to the surface of the external base layer or within an angle of 3 degrees off the vertical. In consequence, the p-type InGaAs in the external base regions remains p-type conductive and low resistive and the n-type InAlAs layer in the external emitter regions can be made highly resistive. By this method, InGaAs-base C-top HBTs can be fabricated on a smaller chip at low cost without increase of the number of processes.

    摘要翻译: 本发明提供一种半导体器件的制造方法,以低成本制造InGaAs基C顶HBT。 具有较小半径的氦离子注入未被不掺杂的InGaAs间隔层,n型InP集电极层,n型InGaAs覆盖层和集电体组成的叠层的p型InGaAs层(在外部基极区域中) 电极从垂直于外部基底层的表面的方向延伸,或者垂直于3度的角度。 因此,外部基极区域中的p型InGaAs保持p型导电和低电阻,并且外部发射极区域中的n型InAlAs层可以被制成高电阻性。 通过这种方法,可以以较低的成本在较小的芯片上制造InGaAs基C顶HBT,而不增加工艺数量。

    Radio communication apparatus and semiconductor device
    9.
    发明授权
    Radio communication apparatus and semiconductor device 失效
    无线电通信装置和半导体装置

    公开(公告)号:US06775525B1

    公开(公告)日:2004-08-10

    申请号:US09697210

    申请日:2000-10-26

    IPC分类号: H01Q1112

    摘要: A radio communication apparatus including at the transmitter-side output stage a high-frequency power amplifier module that has incorporated therein a single-stage amplifier using one multi-finger type heterojunction bipolar transistor (HBT) or a multi-stage amplifier using a plurality of HBTs sequentially connected in cascade, and at the output end an antenna connected to the high-frequency power amplifier module, wherein first capacitors and first resistors are inserted in series between the input terminal of the high-frequency power amplifier module and the control fingers of the HBT, and second resistors are inserted between the control terminal of the high-frequency power amplifier module and the control fingers of the HBT and connected to the nodes of the first resistors and the first capacitors.

    摘要翻译: 一种无线电通信装置,包括在发射机侧输出级的高频功率放大器模块,其中结合有使用一个多指型异质结双极晶体管(HBT)的单级放大器或使用多 HBT顺序地级联连接,在输出端连接到高频功率放大器模块的天线,其中第一电容器和第一电阻串联插入高频功率放大器模块的输入端和控制指 HBT和第二电阻器插入在高频功率放大器模块的控制端子和HBT的控制指头之间,并连接到第一电阻器和第一电容器的节点。