Phase-locked loop systems and methods

专利名称：Phase-locked loop systems and methods发明人：Harald Weller,Ludmil Nikolov,Ji Zhao申请号：US113350申请日：20060119

公开号：US200701799A1公开日：20070719

专利附图：

摘要：Improved common mode feedback techniques are provided for charge pumps,phase-locked loops (PLLs), and other circuits. For example, in accordance with anembodiment of the present invention, a circuit includes a loop filter having first andsecond loop filter nodes. An amplifier is provided having first and second differential

inputs respectively coupled to the first and second loop filter nodes. A first currentsource is coupled to the first loop filter node and a second current source is coupled tothe second loop filter node. The first and second current sources are adapted tocontinuously adjust a common mode voltage of the loop filter nodes.

申请人：Harald Weller,Ludmil Nikolov,Ji Zhao

地址：Bristol GB,Chippenham GB,Saratoga CA US

国籍：GB,GB,US

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