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Ȩ Ȩ > ¿¬±¸¹®Çå > ±¹³» ³í¹®Áö > Çѱ¹Åë½ÅÇÐȸ ³í¹®Áö (The Journal of Korea Information and Communications Society)

Çѱ¹Åë½ÅÇÐȸ ³í¹®Áö (The Journal of Korea Information and Communications Society)

Current Result Document :

ÇѱÛÁ¦¸ñ(Korean Title) ´Ùä³Î TI-ADC¸¦ À§ÇÑ »ùÇà ½Ã°£ ºÒÀÏÄ¡ º¸Á¤ ±â¹ý
¿µ¹®Á¦¸ñ(English Title) Timing Mismatch Calibration for Multiple-Channel TI-ADC
ÀúÀÚ(Author) ¶óµ¿ÁØ   ¼­¿ø±â   ½ÉÈ«¼®   ÃÖ±ÇÈÞ   Dongjun Na   Won-Gi Seo   Hongsuk Shim   Kwonhue Choi  
¿ø¹®¼ö·Ïó(Citation) VOL 47 NO. 05 PP. 0701 ~ 0709 (2022. 05)
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(Korean Abstract)
¾Æ³¯·Î±×-µðÁöÅÐ º¯È¯±â (ADC) ä³Î°£ »ùÇà ½Ã°£ ºÒÀÏÄ¡´Â Time-interleaved ADC (TI-ADC)ÀÇ Spurious Free Dynamic Range (SFDR) ¼º´ÉÀ» ÀúÇϽÃÅ°´Â ÁÖ¿ä ¿äÀÎÀÌ´Ù. ±âÁ¸ÀÇ ´Ùä³Î TI-ADCÀÇ »ùÇà ½Ã°£ ºÒÀÏÄ¡ º¸Á¤ ±â¹ý¿¡¼­´Â º¸Á¤ÇÊÅÍÀÇ ÁÖÆļö ÀÀ´äÀÌ ¸Å¿ì º¹ÀâÇÑ ½ÄÀ¸·Î À¯µµµÇ¹Ç·Î ±Ù»çÈ­µÈ ÁÖÆļö ÀÀ´äÀ» Àû¿ëÇÏ¿´°í, ±Ù»çÈ­ ¿¡ ÀÇÇØ »ùÇà ½Ã°£ ºÒÀÏÄ¡ °ªÀÇ ¹üÀ§°¡ Å« ȯ°æ¿¡¼­´Â SFDR ¼º´É °³¼±·®ÀÌ °¨¼ÒÇÑ´Ù. º» ³í¹®¿¡¼­´Â, ´Ùä³Î TI-ADC¸¦ À§ÇÑ »ùÇà ½Ã°£ ºÒÀÏÄ¡¿¡ °­ÀÎÇÑ »ùÇà ½Ã°£ ºÒÀÏÄ¡ º¸Á¤ ±â¹ýÀ» Á¦¾ÈÇÑ´Ù. Á¦¾ÈÇÏ´Â ±â¹ýÀº ¿©·¯ ä³ÎÀÇ »ùÇà ½Ã°£ ºÒÀÏÄ¡¸¦ º¸Á¤Çϱâ À§ÇØ, ¸ðµç ä³ÎÀ» 2°³ ä³Î¾¿ ±×·ìÀ¸·Î ¹­°í, ±×·ìº°·Î ºÒÀÏÄ¡¸¦ º¸Á¤ÇÑ´Ù. ±× ´ÙÀ½, ÀÌÀü º¸Á¤ÀÇ °á°ú¿¡ ´ëÇØ ±×·ìÈ­ ¹× º¸Á¤À» ¼øÂ÷ÀûÀ¸·Î ¼öÇàÇÏ¿© ÃÖÁ¾ÀûÀ¸·Î ¸ðµç ä³ÎÀÇ »ùÇà ½Ã°£ ºÒÀÏÄ¡¸¦ º¸Á¤ÇÑ´Ù. ¼º´É ½ÇÇè °á°ú¿¡¼­, ±âÁ¸ ±â¹ýÀº »ùÇà ½Ã°£ ºÒÀÏÄ¡ ¹üÀ§°¡ Áõ°¡ÇÔ¿¡ µû¶ó º¸Á¤ ¼º´ÉÀÌ ÀúÇϵÇÁö¸¸, Á¦¾ÈÇÏ´Â ±â¹ýÀº »ùÇà ½Ã°£ ºÒÀÏÄ¡ ¹üÀ§°¡ Å« ȯ°æ¿¡¼­µµ º¸Á¤ ¼º´ÉÀÌ À¯ÁöµÇ´Â °ÍÀ» È®ÀÎÇÒ ¼ö ÀÖ´Ù.
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(English Abstract)
Sample timing mismatch between analog-to-digital converters (ADC) channels is a major factor in degrading the spurious free dynamic range (SFDR) performance of Time-interleaved ADCs (TI-ADCs). In the conventional sample timing mismatch calibration scheme for multi-channel TI-ADC, an approximated frequency response was applied to the calibration filters, because the frequency response is induced in a complicated closed-form expressions. Thus, SFDR performance improvements are reduced by approximation in environments with large sample timing mismatch. In this paper, we propose a sample timing mismatch calibration scheme robust to sample timing mismatch for multi-channel TI-ADC. In order to calibrate the sample timing mismatches between multiple channels, all channels are paired into groups, and the mismatch is calibrated for each group. Then, grouping and calibration are sequentially performed on the results of the previous calibration to calibrate the sample timing mismatch of all channels. The performance simulations show that the proposed scheme maintains the calibration performance even in an environment in which the sample timing mismatch range is large, whereas the conventional scheme degrades the calibration performance as the sample timing mismatch range increases.
Å°¿öµå(Keyword) Analog-to-digital converter (ADC)   TI-ADC   timing mismatch   calibration   digital sample-time correction  
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