| Autor: |
Hyunkyu Park, Yong-Un Jeong, Suhwan Kim |
| Jazyk: |
angličtina |
| Rok vydání: |
2022 |
| Předmět: |
|
| Zdroj: |
IEEE Access, Vol 10, Pp 91888-91896 (2022) |
| Druh dokumentu: |
article |
| ISSN: |
2169-3536 |
| DOI: |
10.1109/ACCESS.2022.3199429 |
| Popis: |
Separate inverter-based summers for each eye are introduced into the decision feedback equalizer (DFE) of a single-ended four-level amplitude modulation (PAM-4) receiver for memory interfaces. The summers increase the input swing of the slicers while maintaining the advantages of inverter-based amplifiers with higher gain and lower power consumption than current-mode logic (CML) amplifiers. The high-gain summer can improve clock-to-Q delays of slicers in the PAM-4 DFE without increasing the power consumption of the slicers. This can alleviate the timing constraint that the DFE must meet to respond correctly to the previous data. The non-linear gain of the inverter-based structure can be ignored by using separate paths depending on each eye. A prototype chip was fabricated in a 65 nm CMOS process. At 24 Gb/s, the DFE can achieve a bit error rate (BER) of 10−12 with an eye width of 100 mUI with −7.3 dB insertion loss at Nyquist frequency and the power efficiency of 0.73 pJ/b. |
| Databáze: |
Directory of Open Access Journals |
| Externí odkaz: |
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