发明授权
- 专利标题： Subscriber line interface circuit with intra-operational state selectable supply
- 专利标题（中）： 用户线接口电路，具有工作状态可选择供电
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申请号： US12910782申请日： 2010-10-23
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公开(公告)号： US08467520B2公开(公告)日： 2013-06-18
- 发明人: Yan Zhou , Sean A. Lofthouse , Jonathan C. Grigsby
- 申请人： Yan Zhou , Sean A. Lofthouse , Jonathan C. Grigsby
- 申请人地址： US TX Austin
- 专利权人： Silicon Laboratories Inc.
- 当前专利权人： Silicon Laboratories Inc.
- 当前专利权人地址： US TX Austin
- 代理机构： O'Keefe, Egan, Peterman & Enders LLP.
- 主分类号： H04M1/00
- IPC分类号： H04M1/00
摘要：
A method of generating a plurality of supply voltages for a plurality of subscriber line channels includes generating a first target VBAT value for a first associated linefeed driver from a first VBAT control. A second target VBAT value for a second associated linefeed driver is generated from a second VBAT control. A selected target VBAT value is generated based upon the first and second target VBAT values. A magnitude of the selected target VBAT value is not less than any maximum of a magnitude of the first and second target VBAT values. A switching regulator is controlled to provide a first generated VBAT corresponding to the selected target VBAT value, wherein the switching regulator provides a second generated VBAT having a pre-determined proportional relationship (p) to the first generated VBAT.
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