įast transient response is also an important index to measure the performance of VRs, which is usually achieved by adding an extra speedup loop. Therefore, the proposed regulator has high power supply rejection (PSR) and good noise performance. Furthermore, the N-type power transistor architecture is adopted in this paper. By carefully design the second stage of EA, the high frequency noise of the input voltage has little impact on the output voltage of the EA. Without any additional circuit, the performance of VR can be improved by SPT and also reduce the number of high voltage devices.īy using SPT, the first gain stage of error amplifier (EA) is supplied by the regulated output voltage of proposed VR. This paper adopts the self-power technique (SPT) to achieve a wide power supply range, which means most core modules in regulation loop are supplied by the regulated output voltage of proposed VR. However, these methods limit the voltage headroom. The latter implements well-designed stacked low voltage transistors to maintain the terminal voltages of transistors within technology limit. The former uses an additional preregulator to provide an internal supply voltage for the core regulator. Two of the existing solutions to reduce the use of high voltage transistors are the preregulator method and the stacked low voltage transistors method. However, this kind of transistors usually occupies more area and has worse performance in comparison with the standard transistors. To realize a wide power supply range, the utilization of transistors that can stand high voltage pressure is necessary. Most of linear VRs perform their voltage regulating function with a single voltage supply, but only a few can achieve the combination of wide power supply range, low noise, fast transient, high load capability, and extra protection features. Compared with its switching counterpart, such as switching regulator and charge pump, linear VR has the advantage of high precision, low output noise, and compact size. Thus, wide input voltage range voltage regulator (VR) implemented in nanometer-scale technology can be one of the most suitable candidates for this kind of applications. Besides, the whole SoC system may need to operate under a wide range of input voltage and still provide high performance unaffected by the supply conditions changing. In modern nanometer-scale system on chip (SoC) designs, different sub-blocks usually require different supply rails to achieve some specific functions.
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