DocumentCode :
3227740
Title :
Calibration of channel mismatch in time-interleaved real-time digital oscilloscopes
Author :
Chihyun Cho ; Joo-Gwang Lee ; Hale, Paul D. ; Jargon, Jeffrey A. ; Jeavons, Peter ; Schlager, John ; Dienstfrey, Andrew
Author_Institution :
Center for Electromagn. Wave, Korean Res. Inst. of Stand. & Sci., Daejeon, South Korea
fYear :
2015
fDate :
22-22 May 2015
Firstpage :
1
Lastpage :
5
Abstract :
A novel method is proposed for the calibration of channel mismatch in a time-interleaved real-time digital oscilloscope (RTDO). A simple simultaneous equation is derived from the Fourier transform of the time-interleaved signals. Thus, it only requires a transfer function of time-interleaved ADCs (TIADCs), while most of previous works have employed additional filters. A measurement method for the transfer function of a commercial RTDO is also proposed. The accuracy of the calibration method is determined by the noise produced after the interleaving process. To validate the proposed method, we measure two-tone signals using a commercial RTDO. The calibrated results clearly show signals at spurious frequencies are substantially reduced.
Keywords :
Fourier transforms; analogue-digital conversion; calibration; oscilloscopes; transfer functions; Fourier transform; RTDO; TIADC; calibration method; channel mismatch; filter; measurement method; time-interleaved ADC; time-interleaved real-time digital oscilloscope; time-interleaved signal; transfer function; two-tone signal measurement; Calibration; Finite impulse response filters; Frequency measurement; Noise; Oscilloscopes; Transfer functions; Voltage measurement; Oscilloscope; TIADC; calibration; channel mismatch; time interleaved;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Microwave Measurement Conference (ARFTG), 2015 85th
Conference_Location :
Phoenix, AZ
Type :
conf
DOI :
10.1109/ARFTG.2015.7162896
Filename :
7162896
Link To Document :
بازگشت