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12. 发明授权

US07605731B2 Signal processor with a signal strength detection circuit that is coupled to a loop of an analog to digital converter 有权
标题翻译：具有信号强度检测电路的信号处理器，其耦合到模数转换器的环路
公开(公告)号：US07605731B2
公开(公告)日：2009-10-20
申请号：US11577500
申请日：2005-10-11
申请人： Robert Henrikus Margaretha Van Veldhoven
发明人： Robert Henrikus Margaretha Van Veldhoven
IPC分类号： H03M1/62 , H03M1/84
CPC分类号： H03M3/394 , H03M3/424 , H03M3/452 , H03M3/462
摘要： A signal processing circuit has an analog to digital converter (31) for providing a digital signal to a processor (15) from an analog input signal that is susceptible to variations in signal power, e.g. from a radio front end (12). The device has a variable gain amplifier (13) controlled by a gain control signal based on detected signal strength. The analog to digital converter has a loop comprising a loop filter for processing the input signal. A signal strength detection circuit (32) is provided for generating the gain control signal, which signal strength detection circuit has loop signal detector for detecting the signal strength from the loop. Hence a received signal strength indicator RSSI is directly coupled to the analog to digital converter (31), avoiding the delay of signal strength detection in the digital processor.
摘要翻译：信号处理电路具有模数转换器（31），用于从容易受信号功率变化影响的模拟输入信号（15）提供数字信号给处理器（15）。从无线电前端（12）。该装置具有基于检测到的信号强度由增益控制信号控制的可变增益放大器（13）。模数转换器具有包括用于处理输入信号的环路滤波器的回路。提供信号强度检测电路（32），用于产生增益控制信号，该信号强度检测电路具有环路信号检测器，用于检测来自环路的信号强度。因此，接收的信号强度指示器RSSI直接耦合到模数转换器（31），避免了数字处理器中信号强度检测的延迟。

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