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76 条记录 (耗时 0.013 秒)

    MICROPHONE BIAS CIRCUIT
    52.
    发明申请
    MICROPHONE BIAS CIRCUIT 有权
    麦克风偏置电路

    公开(公告)号：US20150311879A1

    公开(公告)日：2015-10-29

    申请号：US14696998

    申请日：2015-04-27

    申请人： ROHM CO., LTD.

    发明人： Kenta YAMADA ,  Hirotsugu EGO

    IPC分类号： H03G5/28 ,  G06F3/16 ,  H03G5/00 ,  H04R3/00

    CPC分类号： G05F1/10 ,  H03F3/187 ,  H04R1/04

    摘要： A bias circuit supplies a bias voltage VBIAS to a microphone. A variable gain amplifier amplifies a reference voltage VREF. A low-pass filter removes a high-frequency component from the output of the variable gain amplifier. A voltage follower amplifier receives the output voltage of the low-pass filter, and supplies the output voltage to the microphone.

    摘要翻译： 偏置电路向麦克风提供偏置电压VBIAS。 可变增益放大器放大参考电压VREF。 低通滤波器从可变增益放大器的输出中去除高频分量。 电压跟随放大器接收低通滤波器的输出电压，并将输出电压提供给麦克风。

    FREQUENCY VARIABLE COMPOSITE RESONANCE CIRCUIT
    53.
    发明申请
    FREQUENCY VARIABLE COMPOSITE RESONANCE CIRCUIT 审中-公开
    频率可变的复合谐振电路

    公开(公告)号：US20110148514A1

    公开(公告)日：2011-06-23

    申请号：US13059010

    申请日：2010-02-03

    申请人： Koichi Hirama

    发明人： Koichi Hirama

    IPC分类号： H03G5/28

    CPC分类号： H03H7/12 ,  H03H7/175 ,  H03H7/1775 ,  H03H11/04 ,  H03H11/20 ,  H03H2007/0192 ,  H03H2011/0494

    摘要： A composite resonance circuit is provided of which the resonance frequency range can be set with greater degrees of freedom with the peak frequency of the resonance characteristic curve of a resonance unit having good linearity and the resonance sharpness Q-factor being kept within a desired range. In the composite resonance circuit according to the present invention, first and second relay circuits are respectively connected between the resonance unit and first and second phase shift circuits that shift an input frequency signal by different phases. Hence, the resonance frequency range can be set by setting the gains and impedances of the first and second relay circuits according to its use, without changing resonance elements or the like of the resonance unit.

    摘要翻译： 提供一种复合谐振电路，其谐振频率范围可以以更高的自由度设定，谐振单元的谐振特性曲线的峰值频率具有良好的线性度，并且谐振锐度Q因子保持在期望的范围内。 在根据本发明的复合谐振电路中，第一和第二继电器电路分别连接在谐振单元与通过不同相位移位输入频率信号的第一和第二相移电路之间。 因此，可以通过根据其使用设置第一和第二继电器电路的增益和阻抗而不改变谐振单元的谐振元件等来设置谐振频率范围。

    Slope equalizer using baseband detection
    54.
    发明授权
    Slope equalizer using baseband detection 失效
    斜率均衡器采用基带检测

    公开(公告)号：US5606735A

    公开(公告)日：1997-02-25

    申请号：US496679

    申请日：1995-06-29

    申请人： Nick Ierfino

    发明人： Nick Ierfino

    IPC分类号： H03G5/28 ,  H04B1/10

    CPC分类号： H04B1/1027 ,  H03G5/28

    摘要： A device and method for correcting an amplitude slope in the frequency domain of an input signal. An amplitude slope is detected in parallel feedback loops that connect the combined output of two parallel out-of-band notch filters through a slope detection circuit to inputs of each of the two notch filters. Each feedback loop detects the energy at one of the high and low frequencies that define the frequency domain of the input signal, and provides a voltage indicative of the energy back to the notch filters to vary the Q of the notch filters, thereby correcting the amplitude slope. The energy is detected in each feedback loop by mixing the input signal with one of the high and low frequencies that define the frequency domain of the input signal, and filtering out all but the DC voltage indicative of the energy at the one frequency. The DC voltage changes the resistance of an element in the notch filters to vary Q.

    摘要翻译： 一种用于校正输入信号的频域中的幅度斜率的装置和方法。 在将两个并行带外陷波滤波器的组合输出通过斜率检测电路连接到两个陷波滤波器中的每一个的输入的并行反馈回路中检测振幅斜率。 每个反馈回路检测限定输入信号的频域的高频和低频之一处的能量，并且将表示能量的电压提供给陷波滤波器以改变陷波滤波器的Q，从而校正振幅 坡。 通过将输入信号与限定输入信号的频域的高频和低频之一混合，并且除去指示在一个频率处的能量的直流电压之外的所有信号，来检测每个反馈回路中的能量。 直流电压改变陷波滤波器中的元件的电阻以改变Q。

    Amplifying and equalizing
    55.
    发明授权
    Amplifying and equalizing 失效
    放大和均衡

    公开(公告)号：US4179669A

    公开(公告)日：1979-12-18

    申请号：US912334

    申请日：1978-06-05

    申请人： George B. Dodson ,  John A. Nangeroni

    发明人： George B. Dodson ,  John A. Nangeroni

    IPC分类号： H03F3/68 ,  H03G9/02 ,  H03G5/28

    CPC分类号： H03F3/68 ,  H03G9/025

    摘要： Left and right stereo power amplifiers receive power from the 12-volt D.C. automobile supply bypassed by a single capacitor for both amplifiers and energize left and right loudspeakers in series with the junction of the series-connected speakers coupled to ground through a capacitor that allows the left and right speakers to be independently driven by the left and right power amplifiers, respectively, by spectral components above the crossover frequency determined by the speaker impedance and the capacitor impedance. Each power amplifier is driven by an equalizing circuit including a photocell illuminated by an LED that is driven by a feedback signal from the power amplifier.

    摘要翻译： 左和右立体声功率放大器从两个放大器的单个电容器旁路的12伏直流汽车电源接收电力，并通过一个电容器与串联连接的扬声器的接点串联，从而向左和向右扬声器通电， 左和右扬声器分别通过由扬声器阻抗和电容器阻抗确定的交叉频率以上的频谱分量独立地由左和右功率放大器驱动。 每个功率放大器由包括被来自功率放大器的反馈信号驱动的LED照亮的光电池的均衡电路驱动。

    Multi-mode amplifier architectures with resonant structures
    60.
    发明授权
    Multi-mode amplifier architectures with resonant structures 有权

    公开(公告)号：US10965259B2

    公开(公告)日：2021-03-30

    申请号：US16741522

    申请日：2020-01-13

    申请人： SKYWORKS SOLUTIONS, INC.

    发明人： Junhyung Lee ,  Johannes Jacobus Emile Maria Hageraats

    IPC分类号： H03F3/72 ,  H03F3/193 ,  H03F3/21 ,  H03F3/19 ,  H03F3/24 ,  H03G1/00 ,  H03G5/28 ,  H03G3/30

    摘要： The disclosed technology is related to a radio-frequency (RF) amplifier having a bypass circuit and a resonant structure to improve performance in a bypass mode (e.g., a low gain mode). The disclosed amplifiers have a resonant structure that effectively isolates an amplifier core from a bypass circuit. For example, in a bypass mode, the resonant structure is configured to create an open impedance looking into the amplifier core input. This effectively removes any loading from the amplifier core to the bypass circuit. The disclosed amplifiers with resonant structures improve linearity performance in bypass modes due at least in part to the open impedance to the amplifier core provided by the resonant structure.