片上电源电压调整

On-chip power supply voltage regulation

Abstract

本发明涉及片上电源电压调整。一种集成电路(100),其具有功率调整电路(104),用于主动调整第一电源轨道V<sub>dd</sub>及第二电源轨道V<sub>ss</sub>之间的电压差,该第一电源轨道V<sub>dd</sub>及第二电源轨道V<sub>ss</sub>用于为处理电路(102)提供电功率。一电压调整电容器C<sub>a</sub>具有连接到第一电源轨道V<sub>dd</sub>的一个端;及选择性地连接到第二电源轨道V<sub>ss</sub>或第三电源轨道V<sub>dda</sub>的第二端。一旦电压感测电路106检测到电压欠冲,则电容器C<sub>a</sub>连接到第三电源轨道V<sub>dda</sub>,以便转储电容器C<sub>a</sub>中的至少一部分电荷C<sub>a</sub>V<sub>dda</sub>到第一电源轨道V<sub>dd</sub>以抵抗电压下降。在正常操作期间,电荷累积在电容器C<sub>a</sub>中。提供一附加负载装置T<sub>2</sub>以便一旦检测到过冲即降低电压差。
An integrated circuit (100) is provided with power regulating circuitry (104) serving to actively regulate the voltage difference between a first power supply rail Vdd and a second power rail Vss being used to supply electrical power to processing circuitry (102). A voltage regulating capacitor Ca has one terminal connected to the first power rail Vdd and a second terminal selectively connected to either the second power rail Vss or a third power rail Vdda. Should a voltage undershoot be detected by voltage sensing circuitry 106, then the capacitor Ca is connected to the third power rail Vdda so as to dump at least part of charge Ca, Vdda in capacitor Ca onto the first power rail Vdd and resist the voltage drop. During normal operation, charge is accumulated into the capacitor Ca. An additional load device T2 is provided to lower the voltage difference should an overshoot be detected.

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Cited By (2)

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    CN-104133382-ANovember 05, 2014Nxp股份有限公司Power arbitration method and apparatus having a control logic circuit for assessing and selecting power supplies
    CN-105528008-BFebruary 15, 2017华润矽威科技(上海)有限公司一种不改变芯片引脚调整芯片输出参数的方法及系统