Stereo decoder and method for processing pilot signal
    1.
    发明授权
    Stereo decoder and method for processing pilot signal 有权
    立体声解码器和处理导频信号的方法

    公开(公告)号:US08045717B2

    公开(公告)日:2011-10-25

    申请号:US11403775

    申请日:2006-04-13

    IPC分类号: H04H20/47

    CPC分类号: H04H40/54

    摘要: A stereo decoder and a method therefor are provided. The stereo decoder receives a MPX signal from an FM demodulator, and comprises a first auto-calibration circuit, a band-pass filter, a second auto-calibration circuit, a slicer and a PLL circuit. The first auto-calibration circuit generates a first control signal. The band-pass filter generates the pilot signal by filtering the MPX signal with a center frequency set by the first control signal. The second auto-calibration circuit generates a second control signal. The slicer converts the pilot signal into a square wave signal. The PLL circuit comprises a voltage controlled oscillator for generating an oscillation frequency in response to the second control signal. The PLL circuit receives the square wave signal to generate the reference signal around the predetermined frequency in response to the oscillation frequency.

    摘要翻译: 提供了一种立体声解码器及其方法。 立体声解码器从FM解调器接收MPX信号,并且包括第一自动校准电路,带通滤波器,第二自动校准电路,限幅器和PLL电路。 第一自动校准电路产生第一控制信号。 带通滤波器通过以由第一控制信号设置的中心频率对MPX信号进行滤波来生成导频信号。 第二自动校准电路产生第二控制信号。 切片器将导频信号转换成方波信号。 PLL电路包括用于响应于第二控制信号产生振荡频率的压控振荡器。 PLL电路接收方波信号,以响应于振荡频率产生围绕预定频率的参考信号。

    Stereo decoding system capable of reducing the phase shift during the signal transforming
    2.
    发明授权
    Stereo decoding system capable of reducing the phase shift during the signal transforming 有权
    立体声解码系统能够在信号变换期间减少相移

    公开(公告)号:US07822211B2

    公开(公告)日:2010-10-26

    申请号:US11456999

    申请日:2006-07-12

    IPC分类号: H04H20/48

    CPC分类号: H04H40/63 H04B1/1653

    摘要: A stereo decoding system comprises an oscillator, a bandpass filter, a PLL unit and a stereo decoder. The oscillator generates a first signal with a center frequency. The bandpass filter receives a stereo multiplexed signal and the first signal to filter out a pilot signal. The PLL unit receives the pilot signal to generate a PLL output signal. The stereo decoder receives the stereo multiplexed signal and the PLL output signal to separate a left channel signal and a right channel signal from the stereo multiplexed signal.

    摘要翻译: 立体声解码系统包括振荡器,带通滤波器,PLL单元和立体声解码器。 振荡器产生具有中心频率的第一信号。 带通滤波器接收立体声多路复用信号和第一信号以滤除导频信号。 PLL单元接收导频信号以产生PLL输出信号。 立体声解码器接收立体声多路复用信号和PLL输出信号,以分离来自立体声多路复用信号的左声道信号和右声道信号。

    STEREO DECODING SYSTEM CAPABLE OF REDUCING THE PHASE SHIFT DURING THE SIGNAL TRANSFORMING
    3.
    发明申请
    STEREO DECODING SYSTEM CAPABLE OF REDUCING THE PHASE SHIFT DURING THE SIGNAL TRANSFORMING 有权
    立体声解码系统能够在信号变换期间减少相位移位

    公开(公告)号:US20080013743A1

    公开(公告)日:2008-01-17

    申请号:US11456999

    申请日:2006-07-12

    IPC分类号: H04H5/00

    CPC分类号: H04H40/63 H04B1/1653

    摘要: A stereo decoding system comprises an oscillator, a bandpass filter, a PLL unit and a stereo decoder. The oscillator generates a first signal with a center frequency. The bandpass filter receives a stereo multiplexed signal and the first signal to filter out a pilot signal. The PLL unit receives the pilot signal to generate a PLL output signal. The stereo decoder receives the stereo multiplexed signal and the PLL output signal to separate a left channel signal and a right channel signal from the stereo multiplexed signal.

    摘要翻译: 立体声解码系统包括振荡器,带通滤波器,PLL单元和立体声解码器。 振荡器产生具有中心频率的第一信号。 带通滤波器接收立体声多路复用信号和第一信号以滤除导频信号。 PLL单元接收导频信号以产生PLL输出信号。 立体声解码器接收立体声多路复用信号和PLL输出信号,以分离来自立体声多路复用信号的左声道信号和右声道信号。

    Duty-to-voltage amplifier, FM receiver and method for amplifying a peak of a multiplexed signal
    4.
    发明授权
    Duty-to-voltage amplifier, FM receiver and method for amplifying a peak of a multiplexed signal 有权
    负载电压放大器,FM接收器和用于放大多路复用信号的峰值的方法

    公开(公告)号:US08331890B2

    公开(公告)日:2012-12-11

    申请号:US12372403

    申请日:2009-02-17

    IPC分类号: H04B1/16

    CPC分类号: H03F3/217

    摘要: A FM receiver comprises an IF filter, a demodulator and a decoder. The IF filter generates an RSSI and a FM modulated signal in response to a FM signal. The demodulator comprises a duty-to-voltage amplifier for amplifying a peak of a MPX signal. The duty-to-voltage amplifier comprises a current source, a switch and a current splitter. The current source generates a current. The switch controls a flow of the first current in response to a PWM signal. The current splitter splits the flow of the current into a sub-flow in response to the RSSI. The peak of the MPX signal is proportional to the sub-flow. The decoder receives the MPX signal to generate an audio signal to play sound.

    摘要翻译: FM接收机包括IF滤波器,解调器和解码器。 IF滤波器响应于FM信号产生RSSI和FM调制信号。 解调器包括用于放大MPX信号的峰值的占空比电压放大器。 负载电压放大器包括电流源,开关和电流分配器。 电流源产生电流。 开关控制响应于PWM信号的第一电流的流动。 当前的分流器响应于RSSI将电流的流分解成子流。 MPX信号的峰值与子流量成正比。 解码器接收MPX信号以产生音频信号以播放声音。

    Demodulator with output level calibration
    5.
    发明授权
    Demodulator with output level calibration 有权
    具有输出电平校准的解调器

    公开(公告)号:US07957698B2

    公开(公告)日:2011-06-07

    申请号:US12045707

    申请日:2008-03-11

    IPC分类号: H04B17/00 H04B1/16

    摘要: A calibration circuit for calibrating an output level of a demodulator includes a test signal generator, an RSSI module and a calibration module. The test signal generator generates a test signal, and the RSSI module detects the test signal to generate a control signal, wherein the control signal controls the demodulator to process the test signal to generate a determined output signal. The calibration module then calibrates the RSSI module according to the output signal in order to calibrate the output level of the demodulator. When the control signal is utilized to selectively enable or disable a soft-mute function of the demodulator, the calibration module can be utilized to calibrate or determine the soft-mute function of the demodulator.

    摘要翻译: 用于校准解调器的输出电平的校准电路包括测试信号发生器,RSSI模块和校准模块。 测试信号发生器产生测试信号,RSSI模块检测测试信号以产生控制信号,其中控制信号控制解调器处理测试信号以产生确定的输出信号。 然后校准模块根据输出信号校准RSSI模块,以校准解调器的输出电平。 当使用控制信号来选择性地启用或禁用解调器的软静音功能时,校准模块可用于校准或确定解调器的软静音功能。

    DEMODULATOR WITH OUTPUT LEVEL CALIBRATION
    6.
    发明申请
    DEMODULATOR WITH OUTPUT LEVEL CALIBRATION 有权
    具有输出电平校准的DEMODULATOR

    公开(公告)号:US20090233566A1

    公开(公告)日:2009-09-17

    申请号:US12045707

    申请日:2008-03-11

    IPC分类号: H03J7/02 H04B1/06

    摘要: A calibration circuit for calibrating an output level of a demodulator includes a test signal generator, an RSSI module and a calibration module. The test signal generator generates a test signal, and the RSSI module detects the test signal to generate a control signal, wherein the control signal controls the demodulator to process the test signal to generate a determined output signal. The calibration module then calibrates the RSSI module according to the output signal in order to calibrate the output level of the demodulator. When the control signal is utilized to selectively enable or disable a soft-mute function of the demodulator, the calibration module can be utilized to calibrate or determine the soft-mute function of the demodulator.

    摘要翻译: 用于校准解调器的输出电平的校准电路包括测试信号发生器,RSSI模块和校准模块。 测试信号发生器产生测试信号,RSSI模块检测测试信号以产生控制信号,其中控制信号控制解调器处理测试信号以产生确定的输出信号。 然后校准模块根据输出信号校准RSSI模块,以校准解调器的输出电平。 当使用控制信号来选择性地启用或禁用解调器的软静音功能时,校准模块可用于校准或确定解调器的软静音功能。

    Duty-to-voltage amplifier, FM receiver and method for amplifying a peak of a multiplexed signal
    7.
    发明授权
    Duty-to-voltage amplifier, FM receiver and method for amplifying a peak of a multiplexed signal 有权
    负载电压放大器,FM接收器和用于放大多路复用信号的峰值的方法

    公开(公告)号:US07697908B2

    公开(公告)日:2010-04-13

    申请号:US11403740

    申请日:2006-04-13

    IPC分类号: H04B1/16

    CPC分类号: H03F3/217

    摘要: A FM receiver comprises an IF filter, a demodulator and a decoder. The IF filter generates an RSSI and a FM modulated signal in response to a FM signal. The demodulator comprises a duty-to-voltage amplifier for amplifying a peak of a MPX signal. The duty-to-voltage amplifier comprises a current source, a switch and a current splitter. The current source generates a current. The switch controls a flow of the first current in response to a PWM signal. The current splitter splits the flow of the current into a sub-flow in response to the RSSI. The peak of the MPX signal is proportional to the sub-flow. The decoder receives the MPX signal to generate an audio signal to play sound.

    摘要翻译: FM接收机包括IF滤波器,解调器和解码器。 IF滤波器响应于FM信号产生RSSI和FM调制信号。 解调器包括用于放大MPX信号的峰值的占空比电压放大器。 负载电压放大器包括电流源,开关和电流分配器。 电流源产生电流。 开关控制响应于PWM信号的第一电流的流动。 当前的分流器响应于RSSI将电流的流分解成子流。 MPX信号的峰值与子流量成正比。 解码器接收MPX信号以产生音频信号以播放声音。

    Stereo decoder and method for processing pilot signal
    8.
    发明申请
    Stereo decoder and method for processing pilot signal 有权
    立体声解码器和处理导频信号的方法

    公开(公告)号:US20070242831A1

    公开(公告)日:2007-10-18

    申请号:US11403775

    申请日:2006-04-13

    IPC分类号: H04H5/00

    CPC分类号: H04H40/54

    摘要: A stereo decoder and a method therefor are provided. The stereo decoder receives a MPX signal from an FM demodulator, and comprises a first auto-calibration circuit, a band-pass filter, a second auto-calibration circuit, a slicer and a PLL circuit. The first auto-calibration circuit generates a first control signal. The band-pass filter generates the pilot signal by filtering the MPX signal with a center frequency set by the first control signal. The second auto-calibration circuit generates a second control signal. The slicer converts the pilot signal into a square wave signal. The PLL circuit comprises a voltage controlled oscillator for generating an oscillation frequency in response to the second control signal. The PLL circuit receives the square wave signal to generate the reference signal around the predetermined frequency in response to the oscillation frequency.

    摘要翻译: 提供了一种立体声解码器及其方法。 立体声解码器从FM解调器接收MPX信号,并且包括第一自动校准电路,带通滤波器,第二自动校准电路,限幅器和PLL电路。 第一自动校准电路产生第一控制信号。 带通滤波器通过以由第一控制信号设置的中心频率对MPX信号进行滤波来生成导频信号。 第二自动校准电路产生第二控制信号。 切片器将导频信号转换成方波信号。 PLL电路包括用于响应于第二控制信号产生振荡频率的压控振荡器。 PLL电路接收方波信号,以响应于振荡频率产生围绕预定频率的参考信号。

    Sliced transmitter front-end
    9.
    发明授权
    Sliced transmitter front-end 有权
    切片变送器前端

    公开(公告)号:US09065691B2

    公开(公告)日:2015-06-23

    申请号:US13610912

    申请日:2012-09-12

    IPC分类号: H04L25/02 H04L27/00

    CPC分类号: H04L25/02 H04L27/0002

    摘要: An embodiment of the invention provides a sliced transmitter front-end (TX FE). The sliced TX FE includes first TX FE slices and a second TX FE slice that are connected in parallel. As a whole the first TX FE slices contributes a high-gain section to a superimposed gain range of the sliced TX FE. The second TX FE slice has a gain range that constitutes a low-gain section of the superimposed gain range of the sliced TX FE. A minimum gain of the gain range of the second TX FE slice is smaller than a minimum gain of the high-gain section.

    摘要翻译: 本发明的实施例提供了一个切片发射机前端(TX FE)。 分片TX FE包括并行连接的第一TX FE片和第二TX FE片。 作为整体,第一TX FE片对切片TX FE的叠加增益范围贡献高增益部分。 第二TX FE切片具有构成切片TX FE的叠加增益范围的低增益部分的增益范围。 第二TX FE片的增益范围的最小增益小于高增益部分的最小增益。

    Polar transmitter and related signal transmitting method
    10.
    发明授权
    Polar transmitter and related signal transmitting method 有权
    极地发射机和相关信号发射方法

    公开(公告)号:US08472559B2

    公开(公告)日:2013-06-25

    申请号:US12987154

    申请日:2011-01-09

    IPC分类号: H03C3/00

    CPC分类号: H03C5/00 H03C2200/0079

    摘要: A polar transmitter includes: a processor arranged to convert signals from a specific coordinate system to a polar coordinate system, wherein the signals in the polar coordinate system comprises a phase component and an amplitude component; a phase modulation (PM) path configured to have a constant PM group delay, for processing the phase component; an amplitude modulation (AM) path, of which an AM group delay is capable of being determined, for processing the amplitude component; and an adjustable delay circuit, arranged to adjust delay of the signals in the specific coordinate system according to the constant PM group delay and the calibrated AM group delay.

    摘要翻译: 极性发射器包括:处理器,被布置成将来自特定坐标系的信号转换为极坐标系,其中极坐标系中的信号包括相位分量和振幅分量; 相位调制(PM)路径,被配置为具有恒定的PM组延迟,用于处理所述相位分量; 可以确定AM组延迟的幅度调制(AM)路径,用于处理幅度分量; 以及可调延迟电路,被布置为根据恒定的PM组延迟和校准的AM组延迟来调整特定坐标系中的信号的延迟。