Title :
High-Speed Digital-to-Analog Converter Using Schottky Diode Samplers
Author :
Sun, Kae-Oh ; Van der Weid, Daniel Warren
Author_Institution :
Dept. of Electr. & Comput. Eng., Wisconsin Univ., Madison, WI
Abstract :
A new digital-to-analog converter (DAC) structure employing Schottky diode samplers has been developed for very high-speed operation. Instead of switching used for conventional DACs, sampling of a digital bit stream is employed to retrieve the analog signals based on sampling theory. The sampled signals are added using an R-2R resistive ladder network. The samplers are designed to provide impedance matching for reflected signals. The DAC was fabricated as a hybrid circuit, and it achieved 1 Gs/s. Due to its transmission-line architecture, our design is scalable for use at much higher frequencies, as well as higher resolutions
Keywords :
Schottky diodes; digital-analogue conversion; ladder networks; signal sampling; Schottky diode samplers; analog signal retrieval; digital-to-analog converter; hybrid circuit; impedance matching; resistive ladder network; sampling theory; transmission line architecture; Circuits; Coplanar waveguides; Digital-analog conversion; Frequency; Impedance matching; MOSFETs; Sampling methods; Schottky diodes; Sun; Switches; Digital–analog conversion; Schottky diode; digtial-to-analog converter (DAC); sampler;
Journal_Title :
Microwave Theory and Techniques, IEEE Transactions on
DOI :
10.1109/TMTT.2006.883602
