A low-voltage bandgap reference source design in CMOS AMS 0.35μm is presented. For establishing a voltage reference of less than 1V, the current-mode technique is used. The current consumption of the proposed design is 84μA; the supply voltage is 1.2V, and presents a small die area of 0.015mm2. The average measurement results are: temperature coefficient of 114ppm/°C between [-25°C to 100°C], output voltage of 718mV and line regulation of 1.7mV/V.