公开(公告)号：US06777989B2

公开(公告)日：2004-08-17

申请号：US10140144

申请日：2002-05-07

Applicant: Rodney A. Hughes ,  Michael S. Foster

Inventor： Rodney A. Hughes ,  Michael S. Foster

IPC: H03L700

CPC classification number: H03L7/00 ,  G06F1/12

Abstract: A system and method for providing synchronous clocking allows for precise control of the phase relationship of the clocking signals to thereby provide accurate duty cycles for proper system operation. A digital logic circuit, such as a D-type flip-flop, is provided with a phase signal and clock signal having a frequency relationship. The output of the digital logic circuit is a function of the phase signal and clock signal. The synchronous output may be provided to multiple locations within a system to allow for a synchronous local clock in each of the locations.

Abstract translation: 用于提供同步时钟的系统和方法允许精确地控制时钟信号的相位关系，从而为适当的系统操作提供精确的占空比。 诸如D型触发器的数字逻辑电路被提供有具有频率关系的相位信号和时钟信号。 数字逻辑电路的输出是相位信号和时钟信号的函数。 同步输出可以被提供给系统内的多个位置以允许每个位置中的同步本地时钟。

公开(公告)号：US06897692B1

公开(公告)日：2005-05-24

申请号：US10736450

申请日：2003-12-15

Applicant: Rodney A. Hughes

Inventor： Rodney A. Hughes

IPC: H03L7/089 ,  H03L7/18 ,  H03L7/06

CPC classification number: H03L7/0895 ,  H03L7/18

Abstract: A charge pump comprises a first current mirror that injects a first charging current onto a loop filter and a second charging current onto an integrator capacitor. The first and second charging currents are controlled by a first common control signal. The first charging current mirrors the second charging current. A second current mirror drains a first discharging current from the loop filter and a second discharging current from the integrator capacitor. The first and second discharging is currents are controlled by a second common control signal. The first discharging current mirrors the second discharging current. A sampling circuit couples the second charging and discharging currents to the integrator capacitor, which charges or discharges with a difference current between the second charging and discharging currents. A control circuit detects a voltage difference between the loop filter and integrator capacitor and adjusts the first common control signal to minimize the voltage difference.

Abstract translation: 电荷泵包括将第一充电电流注入到环路滤波器上的第一电流镜和在积分电容器上的第二充电电流。 第一和第二充电电流由第一公共控制信号控制。 第一充电电流反映第二充电电流。 第二电流镜从环路滤波器引出第一放电电流，并从积分电容器漏出第二放电电流。 第一和第二放电是由第二公共控制信号控制的电流。 第一放电电流反映第二放电电流。 采样电路将第二充电和放电电流耦合到积分器电容器，该积分器电容器以第二充电和放电电流之间的差电流进行充电或放电。 控制电路检测环路滤波器和积分电容器之间的电压差，并调整第一公共控制信号以最小化电压差。

公开(公告)号：US06642759B1

公开(公告)日：2003-11-04

申请号：US10234426

申请日：2002-09-04

Applicant: Rodney A. Hughes

Inventor： Rodney A. Hughes

IPC: H03L706

CPC classification number: H03L7/0895 ,  H03L7/18

Abstract: A charge pump for injecting a charging current onto a loop filter when a pump control signal is enabled. The charge pump comprises: i) MOS output transistors for injecting or removing the charge onto the loop filter; ii) pre-charge capacitors for storing pre-charge voltages at least equal to the desired gate-to-source voltages of the output transistors; and iii) switching circuitry for coupling the pre-charge capacitors to the gates of the output transistors when the Pump Up and/or Pump Down signals are enabled. The appropriate pre-charge voltage turns on the appropriate output transistor and the charging and/or discharging current is adjusted to a final level determined by the desired gate-to-source voltages and monitoring circuits.

Abstract translation: 一个电荷泵，用于在启用泵控制信号时将充电电流注入环路滤波器。 电荷泵包括：i）用于将电荷注入或去除到环路滤波器上的MOS输出晶体管; ii）预充电电容器，用于存储至少等于所述输出晶体管的所需栅极至源极电压的预充电电压; 以及iii）当泵浦和/或下降信号被使能时，用于将预充电电容器耦合到输出晶体管的栅极的开关电路。 适当的预充电电压导通适当的输出晶体管，并且将充电和/或放电电流调节到由期望的栅极至源极电压和监测电路确定的最终电平。

公开(公告)号：US5828476A

公开(公告)日：1998-10-27

申请号：US660972

申请日：1996-06-11

Applicant: Rodney K. Bonebright ,  Rodney A. Hughes ,  Jay W. Clement ,  John H. Nitardy

Inventor： Rodney K. Bonebright ,  Rodney A. Hughes ,  Jay W. Clement ,  John H. Nitardy

IPC: H04B10/152 ,  H04B10/158 ,  H04B10/00

CPC classification number: H04B10/40 ,  H04B10/693

Abstract: A transceiver (14) for recovering two different types of manchester coded, optical data signals from a photodiode is disclosed. The transceiver (14) includes a preamplifier (28) that receives and differentially amplifies the optical signal to reject power supply noise. The output of the preamplifier (28) is applied to an AC coupler (30) that extracts DC signal components using a switching circuit to produce a purely differential signal. A post amplifier/quantizer (34) receives the purely differential signal from the AC coupler (30) and generates a quantized signal therefrom. The quantized signal is applied to a data filter, clock recovery and control logic system 36 (36) that recovers a clock signal from the data signal that is synchronized by every data edge of the quantized signal.

Abstract translation: 公开了一种用于从光电二极管恢复两种不同类型的曼彻斯特编码的光学数据信号的收发器（14）。 收发器（14）包括前置放大器（28），其接收并差分放大光信号以拒绝电源噪声。 前置放大器（28）的输出被施加到使用开关电路提取DC信号分量以产生纯差分信号的AC耦合器（30）。 后置放大器/量化器（34）从AC耦合器（30）接收纯差分信号，并从其产生量化信号。 量化的信号被施加到数据滤波器，时钟恢复和控制逻辑系统36（36），其从从量化信号的每个数据沿同步的数据信号中恢复时钟信号。

公开(公告)号：US07602818B2

公开(公告)日：2009-10-13

申请号：US09953057

申请日：2001-09-14

Applicant: Tuan A. Dao ,  Rodney A. Hughes ,  James C. Braatz

Inventor： Tuan A. Dao ,  Rodney A. Hughes ,  James C. Braatz

IPC: H04J3/04

CPC classification number: H04L7/0337 ,  H04L7/0338

Abstract: A transceiver providing Fiber Channel data transfer speeds may be implemented in a lower performance process technology as a single unit, thereby reducing cost. A serializer and deserializer each having multiple lower frequency clocks are provided to obtain the equivalent of a high speed clock capable of use in Fiber Channel systems. Lower speed parallel data is converted to higher speed serial data, and vice versa. A digital frequency counter along with a phase detection circuit provides synchronization. Comma detection is provided for data word alignment.

Abstract translation: 提供光纤通道数据传输速度的收发器可以作为单个单元在较低性能的处理技术中实现，从而降低成本。 提供了具有多个较低频率时钟的串行器和解串器，以获得能够在光纤通道系统中使用的高速时钟的等效物。 低速并行数据被转换为更高速的串行数据，反之亦然。 数字频率计数器以及相位检测电路提供同步。 提供逗号检测用于数据字对齐。

公开(公告)号：US07477113B1

公开(公告)日：2009-01-13

申请号：US11017416

申请日：2004-12-20

Applicant: Rodney A. Hughes

Inventor： Rodney A. Hughes

IPC: H03B5/12

CPC classification number: H01P1/15 ,  H03B2201/025 ,  H03J3/185 ,  H03J3/20 ,  H03J2200/10 ,  H03J2200/38

Abstract: A linear voltage-controlled capacitance circuit is provided that includes a plurality of differentially coupled metal-oxide-semiconductor (MOS) varactor pairs. Each MOS varactor pair is operable to receive a same tuning voltage and to receive a bias voltage unique to the MOS varactor pair. The capacitance circuit is operable to generate a positive tank node signal and a negative tank node signal based on the tuning voltage and the bias voltages.

Abstract translation: 提供一种线性压控电容电路，其包括多个差分耦合金属氧化物半导体（MOS）变容二极管对。 每个MOS变容二极管对可操作以接收相同的调谐电压并接收MOS变容二极管对独有的偏置电压。 电容电路可操作以基于调谐电压和偏置电压产生正的储罐结点信号和负罐结点信号。

公开(公告)号：US06664829B1

公开(公告)日：2003-12-16

申请号：US10234633

申请日：2002-09-04

Applicant: Rodney A. Hughes

Inventor： Rodney A. Hughes

IPC: H03L706

CPC classification number: H03L7/0895 ,  H03L7/18

Abstract: A charge pump comprises a first current mirror that injects a first charging current onto a loop filter and a second charging current onto an integrator capacitor. The first and second charging currents are controlled by a first common control signal. The first charging current mirrors the second charging current. A second current mirror drains a first discharging current from the loop filter and a second discharging current from the integrator capacitor. The first and second discharging currents are controlled by a second common control signal. The first discharging current mirrors the second discharging current. A sampling circuit couples the second charging and discharging currents to the integrator capacitor, which charges or discharges with a difference current between the second charging and discharging currents. A control circuit detects a voltage difference between the loop filter and integrator capacitor and adjusts the first common control signal to minimize the voltage difference.

Abstract translation: 电荷泵包括将第一充电电流注入到环路滤波器上的第一电流镜和在积分电容器上的第二充电电流。 第一和第二充电电流由第一公共控制信号控制。 第一充电电流反映第二充电电流。 第二电流镜从环路滤波器引出第一放电电流，并从积分电容器漏出第二放电电流。 第一和第二放电电流由第二公共控制信号控制。 第一放电电流反映第二放电电流。 采样电路将第二充电和放电电流耦合到积分器电容器，该积分器电容器以第二充电和放电电流之间的差电流进行充电或放电。 控制电路检测环路滤波器和积分电容器之间的电压差，并调整第一公共控制信号以最小化电压差。