Accurate Tunable-Gain 1/x Circuit Using Capacitor Charging Scheme.
In: ETRI Journal, Jg. 37 (2015-10-01), Heft 5, S. 972-978
Online
academicJournal
Zugriff:
This paper proposes an accurate tunable-gain 1/x circuit. The output voltage of the 1/x circuit is generated by using a capacitor charging time that is inversely proportional to the input voltage. The output voltage is independent of the process parameters, because the output voltage depends on the ratios of the capacitors, resistors, and current mirrors. The voltage gain of the 1/x circuit is tuned by a 10-bit digital code. The 1/x circuit was fabricated using a 0.18 µm CMOS process. Its core area is 0.011 mm² (144 µm × 78 µm), and it consumes 278 µW at V DD = 1.8 V and f CLK = 1 MHz. Its error is within 1.7% at V IN = 0.05 V to 1 V. [ABSTRACT FROM AUTHOR]
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Titel: |
Accurate Tunable-Gain 1/x Circuit Using Capacitor Charging Scheme.
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Autor/in / Beteiligte Person: | Yang, Byung-Do ; Seo Weon Heo |
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Zeitschrift: | ETRI Journal, Jg. 37 (2015-10-01), Heft 5, S. 972-978 |
Veröffentlichung: | 2015 |
Medientyp: | academicJournal |
ISSN: | 1225-6463 (print) |
DOI: | 10.4218/etrij.15.0114.0577 |
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