公开(公告)号：US06680991B1

公开(公告)日：2004-01-20

申请号：US10263066

申请日：2002-10-01

申请人： Germán Gutierrez

发明人： Germán Gutierrez

IPC分类号： H03D324

CPC分类号： H04L7/033 ,  H03L7/095

摘要： A lock detector is described for detecting a difference between the frequencies of a first and a second input signal. The lock detector includes first and second beat generators configured to generate corresponding beat signals based on the first and second input signals. The second beat signal is phase shifted relative to the first beat signal. A chatter elimination module combines the two chattery beat signals to produce a third corresponding beat signal that is substantially free of chatter. Using this clean beat signal and either of the input signals, a lock detection module produces a lock detection signal, which indicates whether the difference between the frequencies of the first and second input signals is within a prescribed tolerance.

摘要翻译： 描述了用于检测第一和第二输入信号的频率之间的差异的锁定检测器。 锁定检测器包括被配置为基于第一和第二输入信号产生对应的搏动信号的第一和第二拍发生器。 第二拍频信号相对于第一拍子信号相移。 颤振消除模块组合两个颤振差拍信号以产生基本上没有颤音的第三对应节拍信号。 使用这个干净的差拍信号和任一个输入信号，锁定检测模块产生锁定检测信号，该信号指示第一和第二输入信号的频率之间的差是否在规定的公差内。

公开(公告)号：US06566971B1

公开(公告)日：2003-05-20

申请号：US09792684

申请日：2001-02-24

申请人： Germán Gutierrez

发明人： Germán Gutierrez

IPC分类号： H03B508

CPC分类号： H03B5/1228 ,  H03B5/1212 ,  H03B5/1253 ,  H03B5/1256

摘要： The present invention generally relates to voltage-controlled oscillators. More specifically, the present invention relates to method and circuitry for implementing a differentially tuned varactor-inductor oscillator. In one exemplary embodiment, the present invention includes an LC tank circuit having a couple of terminals, a first and second capacitors, and a first and second varactors. The first and second varactors are connected in series forming a first and a second node. The first capacitor connects the first node and one terminal of the LC tank circuit. The second capacitor connects the second node and the other terminal of the LC tank circuit. A pair of differential input control signals is applied across the first and the second varactors, respectively, to tune the LC tank circuit thereby generating an oscillator output.

摘要翻译： 本发明一般涉及压控振荡器。 更具体地，本发明涉及用于实现差分调谐变容二极管 - 电感振荡器的方法和电路。 在一个示例性实施例中，本发明包括具有一对端子，第一和第二电容器以及第一和第二可变电抗器的LC谐振电路。 第一和第二变容二极管串联连接形成第一和第二节点。 第一个电容器连接LC电路的第一个节点和一个端子。 第二电容器连接LC电路的第二节点和另一个端子。 一对差分输入控制信号分别施加在第一和第二变容二极管上，以调谐LC振荡电路，从而产生振荡器输出。