公开(公告)号：US4992757A

公开(公告)日：1991-02-12

申请号：US412669

申请日：1989-09-26

申请人： Toshifumi Shin'e

发明人： Toshifumi Shin'e

IPC分类号： H03F3/45 ,  H03F1/32 ,  H03G11/00 ,  H03K19/086

CPC分类号： H03F1/3211 ,  H03G11/002

摘要： A differential amplifying circuit comprises a differential pair of transistors for differentially amplifying input signals, and an output signal fixing transistor for fixing output signals to avoid the transmission of extraordinary input signals from input terminals to output terminals. The output signal fixing transistor is connected to one of the differential pair of the transistors which is thereby connected to the ground, where extraordinary input signals are supplied to the input terminals. A capacitor element such as a transistor having the same parasitic capacitance as the output signal fixing transistor is connected to the remaining one of the differential pair of the transistors, such that capacitances of the same value are loaded to the differential pair of the transistors. As a result, no offset occurs between the output signals, and wave forms of the output signals are equal to each other.

摘要翻译： 差分放大电路包括用于差分放大输入信号的差分对晶体管和用于固定输出信号的输出信号固定晶体管，以避免从输入端子到输出端子的非常输入信号的传输。 输出信号固定晶体管连接到晶体管的差分对中的一个，从而连接到地，其中非常输入信号被提供给输入端。 诸如具有与输出信号固定晶体管相同的寄生电容的晶体管的电容器元件连接到晶体管的差分对中的剩余的一个，使得相同值的电容被加载到晶体管的差分对。 结果，在输出信号之间不发生偏移，并且输出信号的波形彼此相等。

公开(公告)号：US6072816A

公开(公告)日：2000-06-06

申请号：US23085

申请日：1998-02-13

申请人： Toshifumi Shin'e

发明人： Toshifumi Shin'e

IPC分类号： H04B10/516 ,  H01S5/00 ,  H01S5/042 ,  H01S5/0683 ,  H04B10/2507 ,  H04B10/61 ,  H01S3/096

CPC分类号： H01S5/042 ,  H01S5/0428

摘要： A laser-diode drive circuit which maintains the speed of an optical output power waveform even if the pulsed current waveform of the laser diode changes. The laser diode drive circuit includes a differential transistor pair whose emitted electrodes are connected together, emitter-follower transistors for driving the differential transistor pair, a bias current supply transistor for supplying the laser diode with a bias current, a current source transistor serving as the current source of the differential transistor pair, and an automatic power control circuit. The collector electrode of one of the transistors of the differential transistor pair is connected to both the collector electrode of the bias current supply transistor and the cathode electrode of the laser diode. Current control transistors are provided for setting the currents of the emitter-follower transistors. The bias current supply transistor, the current source transistor and the base electrodes of the first and second current control transistors are connected to the control voltage output of the automatic power control circuit.

摘要翻译： 激光二极管驱动电路即使激光二极管的脉冲电流波形发生变化，也保持光输出功率波形的速度。 激光二极管驱动电路包括发射电极连接在一起的差分晶体管对，用于驱动差分晶体管对的射极跟随器晶体管，用于向激光二极管提供偏置电流的偏置电流源晶体管，用作 差分晶体管对的电流源和自动功率控制电路。 差分晶体管对的一个晶体管的集电极连接到偏置电流源晶体管的集电极和激光二极管的阴极两者。 提供电流控制晶体管用于设置发射极跟随晶体管的电流。 偏置电流源晶体管，电流源晶体管和第一和第二电流控制晶体管的基极连接到自动功率控制电路的控制电压输出。