论文信息 - A 443-µA 37.8-nV/√Hz CMOS multi-stage bandgap voltage reference

A 443-µA 37.8-nV/√Hz CMOS multi-stage bandgap voltage reference

A CMOS bandgap voltage reference is presented, which achieves a low integrated noise of 150nVrms within a 0.1-10Hz bandwidth and a 37.8nV/√Hz wideband noise floor above 100Hz. The low noise performance is accomplished by employing a multi-stage bandgap topology, which results in an inherent noise advantage compared to a conventional CMOS bandgap. Fabricated in a 0.35μm HV CMOS technology, the bandgap voltage reference consumes 443μA from a nominal 3.4-V supply and occupies 0.5mm2 chip area.

Thomas Christen | Weixun Yan

[1] T. R. Viswanathan,et al. A 1.4 V Supply CMOS Fractional Bandgap Reference , 2006, IEEE Journal of Solid-State Circuits.

[2] B. Nauta,et al. Low-power low-voltage chopped transconductance amplifier for noise and offset reduction , 1997, Proceedings of the 23rd European Solid-State Circuits Conference.

[3] K. E. Kuijk,et al. A precision reference voltage source , 1973 .

[4] Franco Maloberti,et al. An incremental ADC sensor interface with input switch-Less integrator featuring 220-nVrms resolution with ±30-mV input range , 2012, 2012 Proceedings of the ESSCIRC (ESSCIRC).

[5] Kofi A. A. Makinwa,et al. A single-trim CMOS bandgap reference with a 3σ inaccuracy of ±0.15% from -40°C to 125°C , 2010, ISSCC.

[6] Anne-Johan Annema,et al. Low-power bandgap references featuring DTMOSTs , 1998 .