A digital-to-analog converter based on differential-quad switching

Author

Park, Sungkyung ; Kim, Gyudong ; Park, Sin-Chong ; Kim, Wonchan

Author_Institution

Sch. of Electr. Eng., Seoul Nat. Univ., South Korea

Volume

37

Issue

10

fYear

2002

fDate

10/1/2002 12:00:00 AM

Firstpage

1335

Lastpage

1338

Abstract

A high-conversion-rate high-resolution oversampling digital-to-analog converter (DAC) for direct digital modulation is addressed in this paper. A new type of switching scheme, called differential-quad switching, is presented. To verify the feasibility of this scheme, essential parts with some auxiliary circuitry for interfacing were fabricated in a 0.8-μm CMOS technology. Measured results show that the switching scheme provides 11-b resolution at 100 MSamples/s and 6-b at 1 GSamples/s. The degradation in signal-to-noise ratio is not observed for the variation of the supply voltage down to 1.5 V, which means the proposed scheme is suitable for low-voltage applications.

Keywords

CMOS integrated circuits; digital-analogue conversion; high-speed integrated circuits; integrated circuit design; modulation; switching circuits; 0.8 micron; 1.5 V; CMOS technology; SNR; differential-quad switching; digital-to-analog converter; direct digital modulation; high-conversion-rate DAC; high-resolution DAC; oversampling DAC; signal-to-noise ratio; CMOS technology; Circuits; Clocks; Degradation; Digital modulation; Digital-analog conversion; Frequency conversion; Signal resolution; Space vector pulse width modulation; Switches;

fLanguage

English

Journal_Title

Solid-State Circuits, IEEE Journal of

Publisher

ieee

ISSN

0018-9200

Type

jour

DOI

10.1109/JSSC.2002.803056

Filename

1035949