公开(公告)号：US06194971B1

公开(公告)日：2001-02-27

申请号：US08840568

申请日：1997-04-21

申请人： David Ian James Glen ,  Hugh Hin-Poon Chow ,  Ray Chau ,  Philip Lawrence Swan

发明人： David Ian James Glen ,  Hugh Hin-Poon Chow ,  Ray Chau ,  Philip Lawrence Swan

IPC分类号： H03B2700

CPC分类号： H03L7/1974 ,  H03B27/00 ,  H03L7/081 ,  H03L7/0996 ,  H03L7/18

摘要： A method and apparatus for providing very small changes in the output oscillation of a controlled oscillation circuit, which may be used in a phase locked loop circuit, is accomplished by a phase-shifting controlled oscillator that includes an oscillation circuit and a selection circuit. The oscillation circuit generates a plurality of oscillations that are of approximately the same frequency and are approximately equally phase shifted from one another. The selection circuit is operably coupled to receive the plurality of oscillations and selects one of them to be the output oscillation based on a control signal. The very small change in the output oscillation occurs when the selection circuit, based on the control signal, selects another one of the oscillations to be the output oscillation. When the change happens, a single pulse is stretched by the phase difference between the “old” output oscillation and the “new” output oscillation.

摘要翻译： 用于在可锁定环路电路中使用的受控振荡电路的输出振荡提供极小变化的方法和装置由包含振荡电路和选择电路的相移控制振荡器来实现。 振荡电路产生大致相同频率并且彼此大致相等移位的多个振荡。 选择电路可操作地耦合以接收多个振荡，并且基于控制信号选择它们中的一个作为输出振荡。 当选择电路基于控制信号选择另一个振荡作为输出振荡时，产生非常小的输出振荡变化。 当发生变化时，单个脉冲被“旧”输出振荡和“新”输出振荡之间的相位差拉伸。

公开(公告)号：US5959601A

公开(公告)日：1999-09-28

申请号：US820291

申请日：1997-03-18

申请人： Chak Cheung Ho ,  Hugh Hin-Poon Chow ,  Ray Chau

发明人： Chak Cheung Ho ,  Hugh Hin-Poon Chow ,  Ray Chau

IPC分类号： G06F3/147 ,  G09G3/36 ,  H03K19/003 ,  H03K19/0185

CPC分类号： G09G3/3611 ,  G06F3/147 ,  H03K19/00315 ,  H03K19/00361 ,  H03K19/018521

摘要： A method and apparatus for providing serial transmission of a parallel input is accomplished by a parallel input serial output transmitter that includes a shift register operably coupled to receive a parallel input and to provide data serially to a gating circuit. The gating circuit, based on the state of the data it receives, generates a drive signal which causes a switching circuit to route current from a first current source to a second current source over different paths to produce a serial output. A bias circuit is coupled to the switching circuit to bias the serial output to a desired level.

摘要翻译： 用于提供并行输入的串行传输的方法和装置由并行输入串行输出发射器实现，该并行输入串行输出发射器包括可操作地耦合以接收并行输入并且向选通电路串行地提供数据的移位寄存器。 门控电路基于其接收的数据的状态产生驱动信号，该驱动信号使切换电路将电流从不同路径上的第一电流源路由到第二电流源，以产生串行输出。 偏置电路耦合到开关电路以将串行输出偏置到期望的电平。

公开(公告)号：US06563485B2

公开(公告)日：2003-05-13

申请号：US09845503

申请日：2001-04-30

申请人： Edward Chak Cheung Ho ,  Nancy Ngar Sze Chan ,  Hugh Hin-Poon Chow

发明人： Edward Chak Cheung Ho ,  Nancy Ngar Sze Chan ,  Hugh Hin-Poon Chow

IPC分类号： G09G336

CPC分类号： H03M9/00 ,  G06F3/1475 ,  G09G3/3611 ,  G09G5/006 ,  G09G2330/06 ,  H04L25/0272 ,  H04L25/0284

摘要： A method and apparatus for providing serial transmission of a parallel input is accomplished by a parallel input serial output transmitter that includes a shift register operably coupled to receive a parallel input and to provide data serially to a gating circuit. The gating circuit, based on the state of the data it receives, generates a drive signal which causes a switching circuit to route current from first and second current sources to a third current source over different paths to produce a serial output. A bias circuit is coupled to the switching circuit to bias the serial output to a desired level.