A CMOS bandgap reference generator with switched-capacitor and corresponding double sampling techniques is presented. The proposed circuit uses a low-gain amplifier to generate an accurate reference voltage so that this structure can be implemented in low-voltage environment. With proper design, the circuit can produce any output voltage between supply voltage and ground. The circuit was designed and implemented in 0.18-m CMOS process. The core circuit occupies about 0.065 mm 2 (240 m 271 m). Measurement results show that the temperature coefficient of the output is 47.3 ppm/C in the temperature range from 40 C to 100 C. The average power consumption is about 48.1 W.