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Power-on reset (POR), power supply monitor (PSM) and control of DC-DC converters are required circuits in embedded systems. Mobile systems often need special power down modes where these three functions POR, PSM and DC-DC control must be executed taking less than 1μΑ of current in total. Traditional design techniques meet a fatal area problem as they try to reduce current by increasing the area of...
This paper describes a Power-On Reset (POR) circuit with very accurate threshold voltage levels. These voltage levels are achieved by calibrating an on-chip programmable voltage reference during the wafer sort or final test. Two different calibration methods are proposed. One which calibrates the reference voltage of a comparator and another method which calibrates the POR threshold voltage levels...
An unexpected POR (power-on reset) may lead to system unstable or hanging-up during the booting. This paper proposed a new reset IC structure to monitor system power during power ramp-up. For system design, this chip contains hysteresis input voltage, power delay control, output enable, power good signal, and LVRC (low voltage reset circuit). Finally, the proposed IC is designed with TSMC 0.35 mum...
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