发明授权
- 专利标题： Ultra low cut-off frequency filter
- 专利标题（中）： 超低截止频率滤波器
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申请号： US13009868申请日： 2011-01-20
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公开(公告)号： US08912843B2公开(公告)日： 2014-12-16
- 发明人: Prasun Kali Bhattacharyya , Sumanth Chakkirala , Prakash Easwaran
- 申请人： Prasun Kali Bhattacharyya , Sumanth Chakkirala , Prakash Easwaran
- 申请人地址： IN Bangalore, Kamataka
- 专利权人： Cadence AMS Design India Private Limited
- 当前专利权人： Cadence AMS Design India Private Limited
- 当前专利权人地址： IN Bangalore, Kamataka
- 代理机构： Rosenberg, Klein & Lee
- 优先权： IN1910/CHE/2010 20100706
- 主分类号： H04B1/10
- IPC分类号： H04B1/10 ; H03H7/01 ; H03H7/06 ; H03H11/12
摘要：
An ultra low cut-off frequency filter. A filter circuit includes a control circuit responsive to an input signal and a feedback signal to generate a control signal. The filter circuit includes a controllable resistor coupled to the control circuit. The controllable resistor is responsive to a reference signal and the control signal to generate the feedback signal. The filter circuit includes a feedback path coupled to the control circuit and the controllable resistor to couple the feedback signal from the controllable resistor to the control circuit, thereby removing noise from at least one of the input signal and the reference signal, and preventing voltage error in the filter circuit.
公开/授权文献
- US20130021092A1 ULTRA LOW CUT-OFF FREQUENCY FILTER 公开/授权日：2013-01-24
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