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BROADBAND SINGLE CONVERSION TUNER INTEGRATED CIRCUITS

机译:宽带单调谐器集成电路

摘要

A tunable receiver is disclosed including a plurality of select filters to perform an initial band selection, a variable-gain low noise amplifier (LNA) whose gain is controlled to prevent its output power level to exceed a predetermined power threshold, a plurality of digitally-tunable tracking filters to pass signals within a selected channel and to reject signals in a corresponding image band, a second LNA to further amplify the received RF signal and to generate differential signal outputs, a down converting stage which converts the received RF signal to an IF signal while rejecting signals in the image band, an IF trap to further reject undesired signals present at the output of the down converting stage, an IF amplifier to amplify the IF signal to compensate for losses, an IF filter to provide channel select and reject undesirable signals, and a variable-gain IF amplifier to amplify the IF signal and maintain its power level within specification.
机译:公开了一种可调接收机,包括:多个选择滤波器,用于执行初始频带选择;可变增益低噪声放大器(LNA),其增益被控制以防止其输出功率水平超过预定功率阈值;多个数字-可调跟踪滤波器使选定通道内的信号通过并拒绝相应图像频带中的信号;第二个LNA进一步放大接收到的RF信号并生成差分信号输出;下变频级将接收到的RF信号转换为IF信号,同时抑制图像频带中的信号; IF陷波器进一步抑制下变频级输出端出现的不良信号; IF放大器,放大IF信号以补偿损耗; IF滤波器,提供通道选择并抑制不良信号信号和可变增益IF放大器,以放大IF信号并将其功率保持在规格范围内。

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