公开(公告)号：US07525346B2

公开(公告)日：2009-04-28

申请号：US10193834

申请日：2002-07-11

申请人： Michael P. Khaw ,  Daniel S. Draper

发明人： Michael P. Khaw ,  Daniel S. Draper

IPC分类号： H03F3/45

CPC分类号： H03F3/45089 ,  H03F2203/45344 ,  H03F2203/45352 ,  H03F2203/45394 ,  H03F2203/45566 ,  H03F2203/45612 ,  H03F2203/45702

摘要： In one system embodiment, the system is characterized by: a differential amplifier including but not limited to at least one amplifying transistor having an emitter coupled directly to a ground. In one embodiment of a method of making a system, the method is characterized by: operably coupling at least one amplifying transistor of a differential amplifier directly to a ground. In one embodiment of a method of driving a system, the method is characterized by: driving at least one amplifying transistor of a differential amplifier with an emitter-follower feedback loop. In one system embodiment, the system is characterized by: a differential amplifier including but not limited to a first amplifying transistor having a base operably coupled with a first emitter-follower feedback loop.

摘要翻译： 在一个系统实施例中，该系统的特征在于：差分放大器，包括但不限于至少一个放大晶体管，其具有直接耦合到地的发射极。 在制造系统的方法的一个实施例中，该方法的特征在于：可操作地将差分放大器的至少一个放大晶体管直接耦合到地。 在驱动系统的方法的一个实施例中，该方法的特征在于：利用射极跟随器反馈回路驱动差分放大器的至少一个放大晶体管。 在一个系统实施例中，该系统的特征在于：差分放大器，包括但不限于第一放大晶体管，其具有与第一发射极 - 跟随器反馈回路可操作耦合的基极。

公开(公告)号：US07504610B2

公开(公告)日：2009-03-17

申请号：US11825463

申请日：2007-07-05

申请人： Daniel S. Draper

发明人： Daniel S. Draper

IPC分类号： G01J1/32

CPC分类号： H04B10/504 ,  H04B10/564

摘要： The power control system utilizing a normal average power control loop to control average power and modulation level of an optic signal generated by an optic signal generator. The target average power is adjusted by a small percentage, and the corresponding change in bias current needed to adjust the average power level is monitored. The change in average power divided by the change in bias current is a measure of the optic signal generator's slope efficiency. Modulation current is adjusted up or down based on the change in slope efficiency compared to the slope efficiency stored at the time of module calibration. By adjusting the modulation current, the desired optic signal output from the transmitter may be maintained.

摘要翻译： 功率控制系统利用正常平均功率控制回路来控制光信号发生器产生的光信号的平均功率和调制电平。 目标平均功率被调整小百分比，并监测调整平均功率电平所需的偏置电流的相应变化。 平均功率的变化除以偏置电流的变化是光信号发生器的斜率效率的度量。 基于斜率效率的变化，与模块校准时存储的斜率效率相比，调制电流上调或下调。 通过调整调制电流，可以保持从发射器输出的期望光信号。

公开(公告)号：US07499648B2

公开(公告)日：2009-03-03

申请号：US10952488

申请日：2004-09-27

申请人： Daniel S. Draper ,  Charles E. Chang ,  Wim F. Cops

发明人： Daniel S. Draper ,  Charles E. Chang ,  Wim F. Cops

IPC分类号： H04B10/16

CPC分类号： H03F3/24 ,  H03F1/0277 ,  H03F3/087 ,  H03F3/72 ,  H04B10/695

摘要： A method and apparatus for signal amplification and decision device operation on a signal which has a magnitude, peak value, or other average power that varies over time. In general, a peak detector detects the peak value of a received signal and responsive to the peak value, selectively enables a decision device when the signal is amplified to increase decision device accuracy. The decision may occur before the amplification forces the signal into saturation. Multi-stage amplification in combination with controlled switching or multiplexing may be utilized to selectively amplify the signal and selectively initiate decision device operation. The peak detector value may also control signal amplification levels in a multi-stage amplifier. Responsive to the peak value, a switch, which receives as its input the output from one or more amplifier stages, may be controlled to output the signal after a desired amount of amplification.

摘要翻译： 一种信号放大和判定装置对具有随时间变化的幅度，峰值或其他平均功率的信号的操作的方法和装置。 通常，峰值检测器检测接收信号的峰值并响应于峰值，当信号被放大以选择性地启用判定装置以增加判定装置精度。 该决定可能发生在放大强制信号饱和之前。 结合受控切换或多路复用的多级放大可用于选择性地放大信号并选择性地启动判定装置的操作。 峰值检测器值也可以控制多级放大器中的信号放大电平。 响应于峰值，可以控制接收来自一个或多个放大器级的输出作为其输入的开关，以在期望的放大量之后输出信号。

公开(公告)号：US4885547A

公开(公告)日：1989-12-05

申请号：US215964

申请日：1988-07-07

申请人： Marshall J. Bell, Jr. ,  Daniel S. Draper

发明人： Marshall J. Bell, Jr. ,  Daniel S. Draper

IPC分类号： H03G3/10 ,  G06G7/16 ,  H03G1/00 ,  H03G3/00

CPC分类号： H03G3/001 ,  H03G1/0023

摘要： A differential amplifier in the form of a Gilbert gain cell is controlled by a pair of input currents applied to a pair of differentially coupled transistor pairs. A digital signal is generated and input into a CMOS digital-to-analog converter (DAC). The DAC outputs a pair of currents on conductors which are maintained at virtual ground by the use of a current mirror and an operational amplifier. The control signals applied to the differentially coupled transistor pairs are generated as base currents of transistors conducting the DAC output currents.