Audio Communication System, An Audio Transmitter and An Audio Receiver
    1.
    发明申请
    Audio Communication System, An Audio Transmitter and An Audio Receiver 审中-公开
    音频通信系统,音频发射器和音频接收器

    公开(公告)号:US20130268278A1

    公开(公告)日:2013-10-10

    申请号:US13526018

    申请日:2012-06-18

    IPC分类号: G10L19/00

    摘要: An audio communication system, an audio transmitter and an audio receiver are described herein. In one aspect, the audio transmitter includes: An analog to digital converter configured to convert an analog audio signal into a digital audio signal; a digital compressor configured to compress the dynamic range of said digital audio signal; a digital modulator configured to modulate the compressed digital audio signal into a wireless communication signal; and the analog to digital converter, the digital compressor and the digital modulator are integrated in one integrated circuit. The described devices improve the compression and expansion device linearity, resulting in better match for the compressor at the transmitter and the expandor at the receiver.

    摘要翻译: 这里描述了音频通信系统,音频发送器和音频接收器。 一方面,音频发送器包括:模数转换器,被配置为将模拟音频信号转换为数字音频信号; 数字压缩器,被配置为压缩所述数字音频信号的动态范围; 数字调制器,被配置为将压缩的数字音频信号调制成无线通信信号; 并且模数转换器,数字压缩器和数字调制器集成在一个集成电路中。 所描述的设备提高了压缩和扩展设备的线性度,从而更好地匹配了发射器处的压缩器和接收器处的扩展器。

    Circuit For A Front-End Tunable Filter of A Communication and Broadcast Receiver and A tuning Method thereof
    3.
    发明申请
    Circuit For A Front-End Tunable Filter of A Communication and Broadcast Receiver and A tuning Method thereof 有权
    一种通信和广播接收机前端可调滤波器的电路及其调谐方法

    公开(公告)号:US20130040595A1

    公开(公告)日:2013-02-14

    申请号:US13655264

    申请日:2012-10-18

    IPC分类号: H04B1/10

    摘要: A circuit for a front-end tunable filter of a communication and broadcast receiver and a tuning method thereof are described herein. In one aspect, the circuit of the tunable filter may be independent of the signal reception link of the receiver. The pre-filter (104) includes a variable capacitance (146) which is adjusted by a tuning signal (160). A negative resistance element (144) and the pre-filter (104) may form an oscillator. The negative resistance element (144) is controlled by an amplitude control signal (162) outputted from an oscillation amplitude control circuit (142). The oscillation amplitude control circuit (142) stabilizes the amplitude of a radio frequency signal (130) in a preset range. An oscillation frequency control circuit (140) stabilizes the frequency of the signal (130) in a preset frequency range by a tuning signal (160). The tuning is completed until both of the amplitude and the frequency of the oscillation signal meet the preset ranges.

    摘要翻译: 本文描述了用于通信和广播接收机的前端可调滤波器的电路及其调谐方法。 在一个方面,可调滤波器的电路可以独立于接收机的信号接收链路。 预滤波器(104)包括由调谐信号(160)调节的可变电容(146)。 负电阻元件(144)和预滤波器(104)可以形成振荡器。 负电阻元件(144)由从振荡幅度控制电路(142)输出的振幅控制信号(162)控制。 振荡幅度控制电路(142)将射频信号(130)的振幅稳定在预设范围内。 振荡频率控制电路(140)通过调谐信号(160)使信号(130)的频率在预设频率范围内稳定。 调谐完成,直到振荡信号的幅度和频率都达到预设范围。

    Circuit for a front-end tunable filter of a communication and broadcast receiver and a tuning method thereof
    4.
    发明授权
    Circuit for a front-end tunable filter of a communication and broadcast receiver and a tuning method thereof 有权
    通信和广播接收机的前端可调谐滤波器的电路及其调谐方法

    公开(公告)号:US08862089B2

    公开(公告)日:2014-10-14

    申请号:US13655264

    申请日:2012-10-18

    摘要: A circuit for a front-end tunable filter of a communication and broadcast receiver and a tuning method thereof are described herein. In one aspect, the circuit of the tunable filter may be independent of the signal reception link of the receiver. The pre-filter (104) includes a variable capacitance (146) which is adjusted by a tuning signal (160). A negative resistance element (144) and the pre-filter (104) may form an oscillator. The negative resistance element (144) is controlled by an amplitude control signal (162) outputted from an oscillation amplitude control circuit (142). The oscillation amplitude control circuit (142) stabilizes the amplitude of a radio frequency signal (130) in a preset range. An oscillation frequency control circuit (140) stabilizes the frequency of the signal (130) in a preset frequency range by a tuning signal (160). The tuning is completed until both of the amplitude and the frequency of the oscillation signal meet the preset ranges.

    摘要翻译: 本文描述了用于通信和广播接收机的前端可调滤波器的电路及其调谐方法。 在一个方面,可调滤波器的电路可以独立于接收机的信号接收链路。 预滤波器(104)包括由调谐信号(160)调节的可变电容(146)。 负电阻元件(144)和预滤波器(104)可以形成振荡器。 负电阻元件(144)由从振荡幅度控制电路(142)输出的振幅控制信号(162)控制。 振荡幅度控制电路(142)将射频信号(130)的振幅稳定在预设范围内。 振荡频率控制电路(140)通过调谐信号(160)使信号(130)的频率在预设频率范围内稳定。 调谐完成,直到振荡信号的幅度和频率都达到预设范围。