单位增益带宽

模拟结果表明，该电路的动态范围为80dB、直流增益63.4dB、单位增益带宽424MHz；

Results from simulation show that the circuit has a dynamic range of 80 dB , an open-loop DC gain of 63.4 dB , and a unity-gain bandwidth of 424 MHz .

设计中采用了对寄生电容不敏感的反相积分器和同相积分器，积分器中的运算放大器选择具有较高直流开环增益和较大单位增益带宽的CMOS两级运放。

The in-phase integrator and reverse-phase integrator which are both not sensitive to parasitic capacitor are chosen in the filter design . The CMOS two-stage operational amplifier which has the high DC gain and unity gain bandwidth is used to form the integrator .

通过对传统单环LDO的频域分析，提出一种快速瞬态响应的双环路LDO稳压器结构，在保证单位增益带宽不变的前提下提高直流增益，进而提高LDO电路的瞬态性能。

Based on the frequency-domain analysis of conventional single-loop LDO , a dual-loop LDO regulator structure with fast transient response is proposed , which improves dc open-loop gain while maintaining the unity gain bandwidth , thus increasing the transient response of LDO regulator .

在5V电源电压下，该放大器的仿真结果为直流增益大于90dB，单位增益带宽大于100MHz，相位裕度大于75°。

Simulation results show that , at 5 V power supply , the OTA has a DC gain greater than 90 dB , a unit gain bandwidth over 100 MHz and a phase margin larger than 75 ° .

仿真结果表明，该电路的开环直流增益为70dB，相位裕度达到86.6°，单位增益带宽为100MHz。

According to the simulation , the dc gain of open loop is 70 ? dB and unity gain-bandwidth product of 100 ? MHz with 86.6 ° of phase margin can be achieved .

该套筒式运算放大器的输入共模反馈结构使输出共模电平维持在2.5V左右，增益可达到110dB以上，相位裕度为50°，单位增益带宽为60.83MHz。

The smart input common-mode feedback structure of the telescopic stage stabilizes the output common-mode voltage at almost 2.5 V.At last , the gain of amplifier is over 110 dB and phase margin is 50 °, and the gain bandwidth is 60.83 MHz .

直流增益大于80dB，单位增益带宽积为100K，相位裕度为90°。浮栅电流源的引入使得本文设计的电路结构更紧凑，面积小于600100平方微米。

DC gain is 80 dB , unity gain bandwidth is 100 KHz , and the phase margin is 90 ° . Floating gate current source is introduced to make the circuit more compact . The area of this design is less than 600 100 square microns .

这个前置缓冲放大器可以达到22MHz的单位增益带宽和很小的运放输入电容。

The front end buffer can obtain a 22 MHz unity gain bandwidth and a very tiny amplifier input capacitance .

通过配置运算放大器的单位增益带宽和滤波器的截止频率，可以实现不同模式间的切换。

The different modes switching can be realized by configuring Gain Bandwidth of the Operational Amplifier and the cutoff frequency of the filter .

同时，该双采样拓扑结构突破了滤波器受运放单位增益带宽和转换速率的传统约束，有效地改善了其高频应用性能。

The dual rate sampling topology breaks the traditional restrictions of filter introduced by unit gain bandwidth and slew rate of operational amplifiers and also improves effectively their performances in high frequency applications .