A compact current steering DAC with component swapping calibration

Author

Nukala, Utthej ; Lee, Kye-Shin

Author_Institution

Dept. of Electr. & Comput. Eng., Univ. of Akron, Akron, OH, USA

fYear

2010

fDate

17-18 Oct. 2010

Firstpage

1

Lastpage

4

Abstract

A compact current steering DAC with component swapping calibration is proposed. By using different reference currents for the upper and lower bits conversion, the number of current sources can be considerably reduced. Therefore, an 8-bit DAC can be realized using only four binary weighted current sources, which reduces the effect of current source mismatch. Furthermore, the performance degradation due to resistor mismatch between the reference current generator and output network is calibrated by swapping the two resistors, and taking the average to obtain the final output of the DAC. As a result, the proposed scheme enables the DAC design using resistors with even poor matching. Circuit level simulation results show the INL is 0.85 LSB with 10% resistor and 1% capacitor mismatch, respectively.

Keywords

calibration; capacitors; circuit simulation; constant current sources; digital-analogue conversion; integrated circuit design; reference circuits; DAC design; binary weighted current source; bits conversion; capacitor mismatch; circuit level simulation; compact current steering DAC; component swapping calibration; current source mismatch; output network; reference current generator; resistor mismatch; word length 8 bit; Calibration; Capacitors; Generators; Light emitting diodes; Resistors; Simulation; Switches;

fLanguage

English

Publisher

ieee

Conference_Titel

Circuits and Systems Workshop (DCAS), 2010 IEEE Dallas

Conference_Location

Richardson, TX

Print_ISBN

978-1-4244-9535-1

Electronic_ISBN

978-1-4244-9534-4

Type

conf

DOI

10.1109/DCAS.2010.5955029

Filename

5955029