Abstract
This brief describes a CMOS current-steering digital-to-analog converter (D/A converter, DAC) with a full-swing output signal. Generally, a normal current-steering DAC cannot have a full-swing output signal because conventional DACs have an inevitable voltage drop at the output current cell. In order to improve the drawbacks, we propose a new scheme of quaternary driver and an output current cell composed of both nMOS and pMOS. First, the nMOS operates from the power supply to the half of the power supply. Second, the pMOS operates independently from the half of the power supply to the ground voltage. Then, the final output voltage is obtained through a multiplexer that is driven by a quaternary driver that selects the optimized current cell. A 6-bit 1-GS/s current-steering DAC has been fabricated with Dongbu 0.11-μm 1-poly 6-metal (1P6M) CMOS technology to verify the performance of the proposed full-swing DAC. The effective chip area is 0.46 mm <sup xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">2</sup> , and power consumption is about 19.1 mW. The measured results reveal that the DAC has a full-swing output signal.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
More From: IEEE Transactions on Circuits and Systems II: Express Briefs
Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.