电流增益

However, operating of the high current, the output power, gain, and efficiency of gyro-TWT will be degraded where the absolute instability, gyrotron backward oscillation and reflective oscillation occur to cause mode competition. Stability issues comprise the key factors limiting the performance of the gyro-TWT.

对於高电流的影响，磁旋行波放大器将有可能引发绝对不稳定、磁旋返波振荡(gyrotron backward oscillation；gyro-BWO)及反射振荡，造成模式竞争而抑制原先操作模式的放大波，进而影响其输出功率、增益及效率。

However, operating of the high current, the output power, gain, and efficiency of gyro-TWT will be degraded where the absolute instability, gyrotron backward oscillation and reflective oscillation occur to cause mode competition. Stability issues comprise the key factors limiting the performance of the gyro-TWT, therefore physical origins of spontaneous oscillations in the gyro-TWT are analyzed and characterized.

然而受限於操作高电流，磁旋行波放大器可能引发绝对不稳定性、磁旋返波振荡(gyrotron backward oscillation；gyro-BWO)及反射振荡，造成模式竞争而抑制原先操作模式的放大波，进而影响其输出功率、增益及效率。

A back electromotive force observer is constructed to acquire the information of speed as well as acceleration. By selecting the time constant or observer gain properly, the current command reduction characteristics can be adjusted freely in some range.

其中的反电动势观测器能方便地获得速度和加速度信息，通过适当调整观测器的时间常数和增益，就能使驱动电流指令值在一定范围内自由调解以达到控制目的。

Low noise figures, high gain and high current capability equate to wide dynamic range and excellent linearity.

低噪声，高增益和高电流能力等同于宽动态范围和优秀的线性度。

The customer can lower the drive current through the crystal by .increasing the capacitor value on the oscillator output while decreasing the value on the oscillator input, increasing the value of a series resistor, or decreasing the gain.

客户端可把振荡电路放大器输出端的负载电容增大，同时降低输入端的负载电容(串联后等效电容须与改变前相同)，增大与晶体串联的电阻阻值，或降低放大器的增益，来降低驱动晶体的电流。

When the beam current is 7A, voltage is 90kV, the velocity ratio is 1.0 and the axial velocity spread is 2%, numerical results show a constant bandwidth of 20%with an efficiency 42%, the peak power and gain are, respectively, 260kW and 47dB.

当电子束的电流为7 A，电压为90 kV，速率比为1.0，纵向动量散度为2%时，计算得到了20%的常数驱动带宽和42%的效率，输出的峰值功率和增益分别为260 kW和47 dB。

The CTIA has a charge-voltage conversion gain of 1.6μV/e~- and helps the Nwell/Psub photodiode to achieve a dark current of 300 fA(3 nA/cm~2) with 300 mV reverse biased voltage.

所采用的改进CTIA结构读出电路功能正确，电荷-电压转换增益为1.6μV/e~-，这种结构令Nwell/Psub光电二极管在300 mV反向偏压条件下，暗电流仅为300fA(3 nA/cm~2)。

2SK955 Pinout: The signal current at the input flows into the summing node of a high-gain amplifier.

2SK955引脚说明：在信号输入电流流入一个高增益放大器求和节点。

My bias currents are quite high enough because i need a very high unity gain frequency (above 1G).

我的偏置电流是很不够高，因为我需要一个非常高的单位增益频率1G的。

The objective of design optimization for the current loop is to maximize the cross-over frequency. The results show the stability is improved and the capability of suppressing the switching noise is far better than the original. The objective of design optimization for the voltage loop is to minimize the gain of the line ripple voltage.As a result the bandwidth minishes obviously and optimization design excelles in restraining the ripple.

主电路以总体积最小为优化目标，优化结果表明电路的体积减少了0.5%；电流环以开环穿越频率最大为目标，优化结果表明电流环的稳定性能得到了改善，开关噪声抑制能力明显优于优化前的；电压环以线纹波电压增益最小为目标，优化结果表明电压环的带宽明显减小，纹波抑制能力远远优于优化前的。

I will endeavour to find you some assistance.

我尽力帮你找人帮忙。

At first I only know bruck is the idol of American younglings, afterwards I returned back to Taiwan ,even in Beijing last year ,I saw her poster everywhere, I was so surprised at her charm.

起初我只晓得布鲁克雷德丝是美国少男少女崇拜的偶像，后来回台湾，甚至去年在北京，居然也四处看见她的海报，才惊讶她的魅力之大。