首页>
外国专利>
Creating additional phase margin in the open loop gain of a negative feedback amplifier system using a boost zero compensating resistor
Creating additional phase margin in the open loop gain of a negative feedback amplifier system using a boost zero compensating resistor
展开▼
机译:使用升压零补偿电阻在负反馈放大器系统的开环增益中创建额外的相位裕量
展开▼
页面导航
摘要
著录项
相似文献
摘要
A low-dropout voltage (LDO) regulator that creates a zero in the open loop gain using a relatively small-sized current control element to divert part of the supplied load current through a “zero” resistor before adding it to the output load. The main part of the output load is passed through a relatively large second current control element. A control signal generated by an error amplifier (e.g., an op-amp) is used to control the small current control element, but is passed through a boost zero compensating resistor before being applied to the large current control element. The voltage signal developed across the “zero” resistor mimics the magnitude and phase of a zero in the loop. This voltage signal is added to the loop gain by, for instance, using a bypass capacitor, and the resulting feedback signal is supplied to the error amplifier.
展开▼