专利名称:Tracking voltage regulator for a subscriber
line interface circuit
发明人:Russell J. Apfel申请号:US115878申请日:20061227
公开号:US20080159525A1公开日:20080703
专利附图:
摘要:In one embodiment, the present invention includes an apparatus having a firstpair of low voltage operational amplifiers to generate an output representative of anabsolute value difference of first and second line voltages of a subscriber loop, and a
third low voltage operational amplifier having an input coupled to the output of the firstpair of low voltage operational amplifiers to filter the output and to provide a switchcontrol signal for a switching regulator that provides a voltage used to generate the firstand second line voltages. The apparatus may include additional circuits such as a limitcircuit to limit the input to the third low voltage operational amplifier and one or morespeedup circuits to reduce a filter time constant of the third low voltage operationalamplifier during a ringing mode of the subscriber loop.
申请人:Russell J. Apfel
地址:Austin TX US
国籍:US
更多信息请下载全文后查看
因篇幅问题不能全部显示,请点此查看更多更全内容
Copyright © 2019- efsc.cn 版权所有 赣ICP备2024042792号-1
违法及侵权请联系:TEL:199 1889 7713 E-MAIL:2724546146@qq.com
本站由北京市万商天勤律师事务所王兴未律师提供法律服务