Bias control circuit
    64.
    发明专利

    公开(公告)号:JP5268036B2

    公开(公告)日:2013-08-21

    申请号:JP2011046919

    申请日:2011-03-03

    申请人: Tdk株式会社

    IPC分类号: H03F3/19 H03F1/02 H03F1/32

    摘要: The problem to be solved is to alleviate the distortion characteristic of an amplifier and to prevent the drop in gain with respect to a low-level high-frequency signal. A bias control circuit (10) for controlling the bias of an amplifier (20) which amplifies a high-frequency signal is provided herein with a detector (11) for detecting the envelope of the high-frequency signal, a first bias circuit (12) for supplying a constant bias current to the amplifier (20) and a second bias circuit (14) for supplying a bias current that varies with the variation of the level of the envelope of the high-frequency signal to the amplifier.

    増幅装置
    65.
    发明专利

    公开(公告)号:JPWO2011161911A1

    公开(公告)日:2013-08-19

    申请号:JP2012521302

    申请日:2011-06-16

    IPC分类号: H03F3/217 H03F1/02

    摘要: 回路規模が大きくならず、かつ増幅装置の伝達関数(ゲインと位相との周波数特性)を変えず、ループゲインを一定に保ちながら、出力信号に重畳するノイズを低減させる技術が開示され、その技術によれば入力音声信号S1の振幅レベルS9を検出し、この振幅レベルS9に対応する目標設定電圧値情報Vsが示す電圧値の電力を出力する電源電圧制御部7と、入力音声信号S1をパルス幅変換するPWM変換器23とPWM変換器23にて変調された信号を補正する補正部とを備えたPWM変調部2とを備え、PWM変調部2は、補正部が目標設定電圧値情報Vsに応じて、電力増幅部4の増幅ゲインの変化分を相殺するように、PWM変換器23にて変調されたPWM信号S5のパルス幅を補正する。

    Signal reproduction device and signal reproduction method
    66.
    发明专利
    Signal reproduction device and signal reproduction method 有权
    信号再现设备和信号再现方法

    公开(公告)号:JP2013135244A

    公开(公告)日:2013-07-08

    申请号:JP2011282505

    申请日:2011-12-23

    IPC分类号: H03F1/26 H04B1/10

    摘要: PROBLEM TO BE SOLVED: To precisely reproduce a weak signal included in an input signal without requiring N independent noise sources and without applying noise to N input signals.SOLUTION: A signal reproduction device for reproducing a weak signal as transmission information by a stochastic resonance phenomenon from an input signal, where noise is superimposed on the weak signal, includes: nonlinear elements NL-NLfor receiving N (N is a natural number of two or greater) received signals R branching to N branch lines L-Land outputting nonlinear output signals NLO-NLO; N delay elements D-Dfor delaying the respective nonlinear output signals by respective different times; and a combiner 10 for combining delayed signals DS-DSoutput from the delay elements D-D. Noise components included in the delay signals DS-DSinto which the respective nonlinear output signals are delayed are very little correlated, but weak signal components are much correlated. A delayed composite signal DA is an amplified weak signal with the noise components removed.

    摘要翻译: 要解决的问题:精确地再现包含在输入信号中的弱信号,而不需要N个独立的噪声源,并且不对N个输入信号施加噪声。解决方案:用于通过随机共振现象再现弱信号作为传输信息的信号再现装置 来自噪声叠加在弱信号上的输入信号包括:非线性元件NL-NL,用于接收分支到N个分支线的N(N是两个或更多个的自然数)接收信号R-Land输出非线性输出信号NLO -NLO; N个延迟元件D-D,用于将相应的非线性输出信号延迟各自不同的时间; 以及用于组合来自延迟元件D-D的延迟信号DS-DS输出的组合器10。 各个非线性输出信号被延迟的延迟信号DS-DS中包含的噪声分量几乎相关,但弱信号分量是相关的。 延迟复合信号DA是去除噪声分量的放大弱信号。

    Amplifier circuit
    67.
    发明专利
    Amplifier circuit 有权
    放大器电路

    公开(公告)号:JP2013110645A

    公开(公告)日:2013-06-06

    申请号:JP2011255207

    申请日:2011-11-22

    发明人: MURAKAMI TADAMASA

    IPC分类号: H03F1/52 H03F1/26 H03F3/193

    摘要: PROBLEM TO BE SOLVED: To limit an excessive input signal within a range of an upper-limit voltage and a lower-limit voltage while suppressing deterioration of a noise figure.SOLUTION: An amplifier circuit includes: an input transistor; a resistance element whose first end is connected to a gate of the input transistor and whose second end is connected to a bias voltage; and a protection circuit that is connected to the gate of the input transistor and limits an input into the gate of the input transistor within a range of an upper-limit voltage and a lower-limit voltage (adjustable) with the bias voltage as a reference.

    摘要翻译: 要解决的问题:在抑制噪声系数的恶化的同时,限制在上限电压和下限电压的范围内的过大的输入信号。 解决方案:放大器电路包括:输入晶体管; 电阻元件,其第一端连接到输入晶体管的栅极,其第二端连接到偏置电压; 以及保护电路,其连接到输入晶体管的栅极并且在偏置电压作为参考的上限电压和下限电压(可调整)的范围内限制输入到输入晶体管的栅极的输入 。 版权所有(C)2013,JPO&INPIT

    Voltage controlling circuit
    69.
    发明专利
    Voltage controlling circuit 有权
    电压控制电路

    公开(公告)号:JP2013009372A

    公开(公告)日:2013-01-10

    申请号:JP2012141809

    申请日:2012-06-25

    发明人: RI YUMEI HAN GEE FEI

    IPC分类号: H03G11/00

    摘要: PROBLEM TO BE SOLVED: To neutralize noises and peaks in output signals.SOLUTION: A voltage clamping module is disposed at an output terminal of a gain amplifying module, so that a voltage level of an amplifying signal outputted by the gain amplifying module can be clamped within a predetermined range. The voltage clamping module includes an upper bound voltage clamping module, which is utilized for limiting the voltage level of the amplifying signal to be lower than an upper bound voltage level, and a lower bound voltage clamping module, which is utilized for limiting the voltage level of the amplifying signal to be higher than a lower bound voltage level.

    摘要翻译: 要解决的问题:消除输出信号中的噪声和峰值。 解决方案:电压钳位模块设置在增益放大模块的输出端,使得增益放大模块输出的放大信号的电压电平可以钳位在预定范围内。 电压钳位模块包括用于将放大信号的电压电平限制为低于上限电压电平的上限电压钳位模块和用于限制电压电平的下限钳位模块 的放大信号高于下限电压电平。 版权所有(C)2013,JPO&INPIT