在各式由電池供應電源的可攜式系統以及通訊相關的電子產品上,利用內部電池來維持運作的,這些產品所需要的是低功率消耗、高操作效率,為了能夠讓電池壽命更長久,縮小靜態電流以延長電池的壽命。 本論文提出幾個低壓降電壓調整器採用晶片是以台積電點三五微米兩層多晶矽四層金屬互補式金屬氧化物半導體製程來實現。我們提出數位控制迴路低壓降電壓調整器,利用數位電路對雜訊的敏感度低、對二次效應的影響度低、對溫度和製程變異的影響度低、功率消耗較低…等優點,改善其功耗的問題,延長電池的使用時間。接著提出虛擬數位式低壓降電壓調整器,利用數位式的誤差放大器來取代傳統電壓調整器中的類比電路之誤差放大器,改善其功耗的問題。 系統單晶片(SOC)中的電壓調整器,需要快速的暫態響應。故我們提出雙迴路控制低壓降電壓調整器,雙迴路控制分別為電壓控制迴路與電流控制迴路。由於電流迴路比電壓迴路的路徑要短,使得暫態響應比傳統的低壓降電壓調整器更快。 為了改善暫態響應,接著利用電流傳輸器當作電壓調整器之誤差放大器,利用電流傳輸器之電流迴授的特性加快恢復時間。最後利用並聯結構的電壓調整器(Shunt regulator)串接在電荷幫浦之後,調節電荷幫浦的輸出電壓,提供電源給後級的資料回復電路使用。
Every kind of portable electronic devices is operated with battery. These electronic products need battery of low power consumption and high transfer efficiency for prolonging the battery life. The low quiescent current is an important parameter that determines the longevity of a battery. Five voltage regulators proposed in this study are implemented with TSMC 0.35μm 2P4M CMOS processes. The first voltage regulator uses digital controlled loop path because the digital circuit has some advantages including, low sensitivity to noise, low second-order effects, low sensitivity to temperature and process, and low power consumption in which to improve the power consumption and prolong battery life of various portable systems. And the second voltage regulator is pseudo-digital mode low dropout voltage regulator that uses a digital error amplifier to replace an analog error amplifier of conventional LDO for improving the power consumption. Voltage regulators used in SOC usually need fast transient response. The third voltage regulator uses the dual loop controlled path in this circuit including the voltage control path and current control path. Current control loop is shorter than voltage control loop, so its transient response is more superior to conventional one. To achieve faster recovery time in transient response, a current convey can be used as an error amplifier of voltage regulator, known as the forth voltage regulator, resulting in current feedback path of current conveyor. The last voltage regulator is shunt regulator that can regulate output voltage of charge pump and provide power supply for data recovery.