A new sub-1-V CMOS bandgap voltage reference without using low-threshold-voltage device is presented in this paper. The new proposed sub-1-V bandgap reference with startup circuit has been successfully verified in a standard 0.25-μm CMOS process, where the occupied silicon area is only 177 μm × 106μm. The experimental results have shown that, with the minimum supply voltage of 0.85 V, the output reference voltage is 238.2mV at room temperature, and the temperature coefficient is 58.1 ppm/°C from-10°C to 120deg;C without laser trimming. Underthe supply voltage of 0.85V, the average power supply rejection ratio (PSRR) is -33.2dB at 10 kHz.
- Bandgap voltage reference
- PSRR (power supply rejection ratio)
- Startup circuit
- Temperature co-efficient
- Voltage reference