Original scientific paper
https://doi.org/10.7305/automatika.2016.03.1616
Design of low-power voltage/current references and supply voltage for 9-bit fully differential ADC
Niko Bako
; Department of Electronics, Microelectronics, Computer and Intelligent Systems, Faculty of Electrical Engineering and Computing , University of Zagreb, Unska3 ,10000, Zagreb, Croatia
Ivo Broz
; Locus Mikuliceva 17, 10000, Zagreb, Croatia
Željko Butković
; Department of Electronics, Microelectronics, Computer and Intelligent Systems, Faculty of Electrical Engineering and Computing , University of Zagreb, Unska3 ,10000, Zagreb, Croatia
Marko Magerl
orcid.org/0000-0003-4091-5320
; Department of Electronics, Microelectronics, Computer and Intelligent Systems, Faculty of Electrical Engineering and Computing , University of Zagreb, Unska3 ,10000, Zagreb, Croatia
Adrijan Barić
orcid.org/0000-0001-5642-3086
; Department of Electronics, Microelectronics, Computer and Intelligent Systems, Faculty of Electrical Engineering and Computing , University of Zagreb, Unska3 ,10000, Zagreb, Croatia
Abstract
This paper presents the design of a low-power voltage reference, bias current and the supply voltage for a 9-bit fully differential ADC. The references, power supply circuits and the ADC are integrated in one circuit, i.e. chip. The proposed chip is implemented in the UMC 0.18 μm CMOS process and occupies 800×700 μm^2 . The circuit supply voltage V DD is obtained from the external RF signal. When the circuit is active VDD is used as a supply for the rest of the circuitry. The circuit generates supply, reference voltages and currents when V DD exceeds the upper voltage level V_HIGH ≈1.82 V. When VDD is lower than the lower voltage level V LOW ≈1.35 V, the circuit is off. When the circuit is active, the current consumption is 22 μA. The presented results are based on measurements.
Keywords
Low-power; voltage references; current references; voltage regulator; analogue-to-digital converter
Hrčak ID:
165521
URI
Publication date:
1.9.2016.
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