首页>
外国专利>
PROGRAMMABLE LOW DROPOUT REGULATORS WITH FAST TRANSIENT RESPONSE WHEN PROGRAMMING OUTPUT VOLTAGE
PROGRAMMABLE LOW DROPOUT REGULATORS WITH FAST TRANSIENT RESPONSE WHEN PROGRAMMING OUTPUT VOLTAGE
展开▼
机译:在编程输出电压时具有快速瞬态响应的可编程低压降稳压器
展开▼
页面导航
摘要
著录项
相似文献
摘要
Apparatus and methods for programmable low dropout regulators for radio frequency (RF) electronics are provided herein. In certain configurations, a power amplifier system includes a multi-stage power amplifier that amplifies a radio frequency signal and includes a driver stage and an output stage. The power amplifier system further includes an envelope tracker that controls a supply voltage of the output stage in relation to an envelope of the radio frequency signal, and a programmable low dropout regulator that includes an output that provides a programmable supply voltage to the driver stage. The programmable low dropout regulator includes an output capacitor electrically connected to the output, a regulation transistor having a drain electrically connected to the output, and an alternative discharge circuit that discharges the output capacitor in response to programming the programmable supply voltage from a high voltage level to a low voltage level.
展开▼