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1. 发明公开

KR1020060120593A 디지털 방식으로 조절 가능한 광대역의 집적 필터 无效
标题翻译：宽带多功能数字滤波器
公开(公告)号：KR1020060120593A
公开(公告)日：2006-11-27
申请号：KR1020067003473
申请日：2004-08-06
申请人： 맥심 인터그래이티드 프로덕츠 인코포레이티드
发明人： 와이트매튜글렌 , 버크랜드조엘데이비드
IPC分类号： H03H7/12
CPC分类号： H03H7/0153 , H03H7/12 , H03H7/1783 , H03J1/0008 , H03J3/06 , H03J2200/10
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 pre-determined 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 FR 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.
摘要翻译：公开了一种可调谐接收机，其包括执行初始频带选择的多个选择滤波器，其增益被控制以防止其输出功率电平超过预定功率阈值的可变增益低噪声放大器（LNA），多个数字可调谐跟踪滤波器，以在所选择的信道内传递信号并拒绝相应图像频带中的信号，第二LNA进一步放大接收的RF信号并产生差分信号输出;下变频级，将接收的FR信号转换为 IF信号同时抑制图像频带中的信号，IF陷波器进一步消除存在于下变换级的输出端的不期望信号，IF放大器放大IF信号以补偿损耗，IF滤波器提供信道选择和拒绝不期望的信号，以及可变增益IF放大器来放大IF信号并将其功率水平保持在规范内。

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