講演情報
[C-12-03]Design of Multi-Frequency-Band Upconversion Paths for Wideband Frequency-Interleaved DAC
〇WENTIAN HOU1, Yunjie Chen1, Koji Asami2, Ritaro Takenaka1, Sota Kano1, Zolboo Byambadorj2, Masahiro Ishida3, Tetsuya Iizuka1 (1. Department of Electrical Engineering and Information Systems, School of Engineering, The University of Tokyo, 2. Systems Design Lab, The University of Tokyo, 3. Advantest Corporation)
キーワード：
digital-to-analog converter (DAC)、frequency-interleaved DAC、I/Q upconversion
Wideband transmitters and signal generators require digital-to-analog converters (DACs) with high sampling rate and wide analog bandwidth, but a single CMOS DAC channel is limited by switching speed, output loading, clock jitter, and power. Frequency-interleaved DACs address this limitation by dividing the target spectrum into subbands, generating each subband with a lower-bandwidth DAC path, upconverting the higher bands, and combining the analog outputs. This presentation describes multi-frequency-band upconversion paths for a frequency-interleaved DAC targeting a 0-20 GHz output spectrum with four 5-GHz bands. Post-layout simulation demonstrates simultaneous combination of four output tones across the target 0-20 GHz spectrum.