ID 原文 译文
43396 电路设计采用负反馈原理，可输出一个稳定的电压，该电压经过电压电流转化为恒定电流。 The circuit was designed based on the negative feedback principle to output a stable voltage that was converted to a constant current by the voltageand current.
43397 为使输出电流更加稳定，在电路中加入现场可编程门阵列 ( FPGA) 芯片 EP4CE10F17C8组成控制电路。 In order to make the output current more stable, a field programmable gate array (FPGA)chip EP4CE10F17C8 was added to the circuit to form a control circuit.
43398 芯片通过采集负反馈的输出与预定值比较，得到误差量反馈到负反馈模块，调整负反馈电路的输入电压，从而使电路输出实现长期稳定。 The output of the negative feedback was compared with a predetermined value by the chip, and the error amount fed back to the negativefeedback module was obtained to adjust the input voltage of the negative feedback circuit, thereby makingthe circuit output stable for a long time.
43399 最后对电路输出性能进行测试，测试结果表明电流的纹波系数为 0. 01，电流稳定度为±0. 02 mA。 Finally, the circuit output performance was tested.The testresults show that the current ripple coefficient is 0.01 and the current stability is ±0.02 mA.At a drivingcurrent of 1.
43400 在驱动电流为 1. 2 mA、激光器工作温度为 60 ℃时，用波长计测试激光器输出波长为 795 nm，同时测得的吸收谱线也表明激光器输出波长在 795 nm 附近。 2 mA and a laser operating temperature of 60 ℃, the output wavelength of the laser ismeasured by a wavelength meter to be 795 nm, and the measured absorption line also indicates that thelaser output wavelength is around 795 nm.
43401 因此，该恒流源电路可用于驱动 VCSEL 输出稳定波长。 Therefore, the constant current source circuit can be used todrive the VCSEL to output a stable wavelength.
43402 基于 0. 25 μm GaAs 增强/耗尽 ( E /D) 型赝配高电子迁移率晶体管 ( PHEMT) 工艺，设计并实现了一款集成了 6 bit 并行驱动器的数字衰减器单片微波集成电路 ( MMIC) 。 A digital attenuator monolithic microwave integrated circuit (MMIC) integrated with a 6 bit parallel driver was designed and implemented based on the 0.25 μm GaAs enhancement /depletion(E /D) mode pseudomorphic high electron mobility transistor (PHEMT) process.
43403 该衰减器采用 T 型衰减网络结构，不仅缩小了芯片面积，并且可实现较好的衰减精度和衰减附加相移。 The attenuator adopteda T-type attenuation network structure, which reduces the chip area and achieves better attenuation accuracy and attenuation additional phase shift.
43404 芯片在片测试结果表明，在－5 V 电源电压下驱动器的静态电流为 1. 8 mA，响应速度为 25 ns。 The test results on wafer show that under －5 V supply voltagethe static current of the driver is 1.8 mA and the response speed is 25 ns.
43405 在 9～18 GHz 频率范围内，衰减器芯片的插入损耗不大于 3. 6 dB，均方根衰减精度不大于0.7 dB，衰减附加相移为－2° ～4°，输入电压驻波比 ( VSWＲ) 不大于 1. 25 ∶ 1，输出 VSWＲ 不大于 1. 5 ∶ 1。 In the frequency range of9－18 GHz, the attenuator chip achieves an insertion loss of no more than 3.6 dB, a root mean square attenuation accuracy of no more than 0.7 dB, an attenuation additional phase shift from － 2°to 4°, aninput voltage standing wave ratio (VSWＲ) of no more than 1.25 ∶ 1, and an output VSWＲ of no morethan 1.5 ∶ 1.