CMOS Bandgap Voltage Reference With 1.8-V Power Supply
نویسنده
چکیده
To overcome the limitation of the silicon energy gap in electron volts 1.2V wluch leads to tllat the voltage reference is fixed at about 1.2V. a design of current-mode (CM) architecture CMOS bandgap voltage reference with afiitnry voltage value by setting tlie resistor value is presented liere with Ion 1.8-V power supply. Tlie siniiilation results indicate a temperature coefficient (TC) of jppmnPC froin -2OOC to 125C after triiiuiung and a.power supply rejeclion ratio (PSRR) of 64dB. systems. So tlie conventional arclutecture is improperly used in the latest deep-submicron teclmologies whose power supply is equal to or lower than 1.2V. Tlus paper presents a low-voltage current-mode CMOS bandgap reference [3][1] wluch architecture can provide arbitrary voltage reference value from 0 to near to the power supply by adjusting current ininor or tlie resistor R, indicated in Figure 1. The complete circuit consists of a start-up circuit, an operational amplifier and the core block including hvo PNP bipolar junction transiston (BJTs).
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