论文信息 - Reference voltage driver for low-voltage CMOS A/D converters

Reference voltage driver for low-voltage CMOS A/D converters

A circuit for generating reference voltages for an A/D converter is presented. The circuit consisting of a bandgap reference and a driver circuit capable of operating on sub 1-volt supply voltages. The circuit is designed using a standard 0.5 /spl mu/m CMOS technology. Simulations show maximum 0.24% variation in the generated reference voltage over a temperature range from -20/spl deg/C to 100/spl deg/C and a supply voltage range from 0.95 V to 1.50 V. The circuit is capable of driving a 2 pF switched capacitor load at 5 MHz clock rate while consuming 450 /spl mu/W of power from a 1.0 V supply.

Kari Halonen | M. Waltari

[1] Michel Steyaert,et al. Converter with 77-dB Dynamic Range , 1998 .

[2] K. Halonen,et al. An 8–bit low–voltage pipelined ADC utilizing switched–opamp technique , 1999 .

[3] W. Sansen,et al. A 900-mV low-power ΔΣ A/D converter with 77-dB dynamic range , 1998, IEEE J. Solid State Circuits.

[4] K. Halonen,et al. 1.0-volt, 9-bit pipelined CMOS ADC , 2000, Proceedings of the 26th European Solid-State Circuits Conference.

[5] K. Sakui,et al. A CMOS bandgap reference circuit with sub-1-V operation , 1999 .

[6] Michiel Steyaert,et al. Switched-opamp: an approach to realize full CMOS switched-capacitor circuits at very low power supply voltages , 1994, IEEE J. Solid State Circuits.