Communication apparatus using common amplifier for transmission and
reception
    4.
    发明授权
    Communication apparatus using common amplifier for transmission and reception 失效
    通信设备使用公共放大器进行发送和接收

    公开(公告)号:US5590412A

    公开(公告)日:1996-12-31

    申请号:US342220

    申请日:1994-11-18

    摘要: A communication apparatus for use in a portable telephone is disclosed which has a transmit-receive common amplifier for amplifying a transmitted signal or received signal, and a mixer for frequency-mixing the transmitted signal or the received signal with a local oscillator output, wherein connection between the mixer and an input side of the amplifier and connection between the mixer and an output side of the amplifier are made by means of respective signal-path selector switches. During reception, a deep bias is applied to an FET of the transmit-receive common amplifier to reduce current consumption, and during transmission, a shallow bias is applied to the FET of the transmit-receive common amplifier for increased output.

    摘要翻译: 公开了一种用于便携式电话的通信装置,其具有用于放大发射信号或接收信号的发射 - 接收公共放大器,以及用本地振荡器输出对发射信号或接收信号进行频率混频的混频器,其中连接 在混频器和放大器的输入侧之间,混频器和放大器的输出侧之间的连接通过相应的信号路径选择器开关进行。 在接收期间,向发射接收公共放大器的FET施加深偏压以减少电流消耗,并且在传输期间,将浅偏压施加到发射 - 接收公共放大器的FET以增加输出。

    Wiring board and circuit apparatus
    5.
    发明授权
    Wiring board and circuit apparatus 失效
    接线板和电路设备

    公开(公告)号:US07450397B2

    公开(公告)日:2008-11-11

    申请号:US11388705

    申请日:2006-03-24

    摘要: A wiring board in which a line can be made narrower and/or a transmission loss can be reduced is developed. The wiring board includes a first conductor and a second conductor maintained at the same potential, a dielectric material layer provided between the first and second conductors, and a third conductor embedded in the dielectric material layer. In the wiring board, a thickness of the dielectric material layer in a first region located between the third conductor and the first conductor is larger than a thickness of the dielectric material layer in a second region located between the third conductor and the second conductor. Moreover, a cross-sectional shape of the third conductor is trapezoidal in which angles of respective ends of the third conductor on a side closer to the second conductor are obtuse.

    摘要翻译: 开发了可以使线路变窄和/或可以减小传输损耗的布线板。 布线板包括保持在相同电位的第一导体和第二导体,设置在第一和第二导体之间的介电材料层和嵌入电介质材料层中的第三导体。 在布线板中,位于第三导体和第一导体之间的第一区域中的电介质材料层的厚度大于位于第三导体和第二导体之间的第二区域中的电介质材料层的厚度。 此外,第三导体的横截面形状是梯形的,其中第三导体在更靠近第二导体的一侧的各端的角度是钝的。

    Double-balanced mixer circuit
    8.
    发明授权
    Double-balanced mixer circuit 失效
    双平衡混频器电路

    公开(公告)号:US5559457A

    公开(公告)日:1996-09-24

    申请号:US215193

    申请日:1994-03-21

    摘要: A double-balanced mixer circuit which consumes less power, and is capable of operating on a low voltage power source, because an output of a first signal having a phase lag of 90.degree. from a first frequency signal and an output of a second signal having a phase lead of 90.degree. over the first frequency signal are provided by means of a first phase shifter, an output of a third signal having a phase lag of 90.degree. from a second frequency signal and an output of fourth signal having a phase lead of 90.degree. over the second frequency signal are provided by means of a second phase shifter, thereby generating a radio frequency signal by mixing the first signal and the third signal in a first dual gate circuit, and generating a radio frequency signal by mixing the second signal and the fourth signal in a second dual gate circuit.

    摘要翻译: 一种双平衡混频器电路,其消耗较少的功率,并且能够在低电压电源上工作,因为与第一频率信号相差90度的第一信号的输出和具有第一信号的第二信号的输出, 通过第一移相器提供90°以上的第一频率信号的相位引导,从第二频率信号输出具有90°的相位滞后的第三信号和具有相位引导的第四信号的输出 通过第二移相器提供第二频率信号的90°,从而通过在第一双门电路中混合第一信号和第三信号来产生射频信号,并且通过混合第二信号来产生射频信号 以及第二双门电路中的第四信号。