发明授权
- 专利标题： Integrated active electronic switched capacitor filter having extremely low sensitivity to variations of the components
- 专利标题（中）： 集成的有源电子开关电容滤波器对组件的变化具有极低的灵敏度
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申请号： US160643申请日： 1988-02-26
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公开(公告)号： US4920325A公开(公告)日： 1990-04-24
- 发明人: Germano Nicollini , Daniel Senderowicz
- 申请人： Germano Nicollini , Daniel Senderowicz
- 申请人地址： ITX Cantania
- 专利权人： SGS-Thomson Microelectronics S.p.A.
- 当前专利权人： SGS-Thomson Microelectronics S.p.A.
- 当前专利权人地址： ITX Cantania
- 优先权： ITX19590A/87 19870305
- 主分类号： H03H11/04
- IPC分类号： H03H11/04 ; H03H19/00
摘要：
The filter comprises four operational amplifiers in cascade, with switched capacitors in series at the input of every amplifier, with fixed capacitors in parallel to two of said amplifiers, with fixed and switched capacitors in parallel to the remaining amplifiers, and with fixed and switched capacitors in common to groups of several amplifiers in cascade. According to the invention, a path of fixed and switched capacitors in parallel connects the input of the filter to the input of the fourth amplifier, and a fixed capacitor connects the input of the filter to the input of the second amplifier.
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