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Bandgap voltage is typically used as the reference voltage of voltage regulators, such as dc-dc converters. Two high-precision CMOS bandgap reference circuits, labeled as current-mode and voltage-mode bandgap circuits, are proposed. The voltage-mode bandgap circuit can work with the supply voltage ranging from 2.5 V to 5V, while the current-mode bandgap works from 1.8 V to 5V. Both of them were designed...
A feedback power control system includes: a multiplying unit receiving work voltage corresponding to the voltage drop in an electrical component and feedback voltage corresponding to the work current flowing through the electrical component, with outputting a measurement voltage corresponding to the power consumed by the electrical component, having a value equal to the product of the work voltage...
A voltage reference source has been developed using only NPN transistors and untrimmed base-layer resistors. A high speed bipolar oxide isolation process (fT= 4 GHz) was used for implementation. The excellent results, 1 mV drift for supply variations of ??10 % and temperature variation of 0 - 120??C, are comparable to those known from technologies especially adapted for precision analogue circuits...
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