专利快速检索-快速检索全球专利，免费商用专利数据库-IPRDB

1. 发明授权

US3787774A Filter circuitry 失效
标题翻译：滤波电路
公开(公告)号：US3787774A
公开(公告)日：1974-01-22
申请号：US3787774D
申请日：1972-08-28
申请人： HEWLETT PACKARD GMBH
发明人： TIETZE U , COURTIN E , TRAUB S
IPC分类号： H03H11/12 , H03B1/04
CPC分类号： H03H11/1217
摘要： Circuitry for filtering a distinct variable spectral component includes a band-rejection filter formed by a summing amplifier with a feedback loop and a bandpass-filter connected to one of its inputs. The summing amplifier is connected to form the difference between the unfiltered spectrum at one of its inputs and the spectrum component to be suppressed at another of its inputs. The summing amplifier delivers the filtered signal spectrum at its output. A control circuit locks the common center frequency of the bandpass and band-rejection filters to the frequency of the spectral component to be suppressed.
摘要翻译：用于对不同可变频谱分量进行滤波的电路包括由具有反馈回路的求和放大器和连接到其输入之一的带通滤波器形成的带阻滤波器。该相加放大器连接以形成其输入端之一的未滤波频谱与待抑制在另一输入端的频谱分量之间的差值。求和放大器在其输出端提供滤波后的信号频谱。控制电路将带通和带阻滤波器的公共中心频率锁定到待抑制的频谱分量的频率。

IPRDB