• Medientyp: E-Artikel
  • Titel: Open-source design of integrated circuits Einsatz freier und quelloffener Software für den Entwurf integrierter Schaltungen : Ein quelloffener 1,44-MS/s 703-μW 12-bit nichtbinärer SAR-ADC mit 448-aF Kondensatoren in einem 130-nm CMOS-Prozess An open-sourced 1.44-MS/s 703-μW 12-bit non-binary SAR-ADC using 448-aF capacitors in 130-nm CMOS : Ein quelloffener 1,44-MS/s 703-μW 12-bit nichtbinärer SAR-ADC mit 448-aF Kondensatoren in einem 130-nm CMOS-Prozess
  • Beteiligte: Fath, Patrick; Moser, Manuel; Zachl, Georg; Pretl, Harald
  • Erschienen: Springer Science and Business Media LLC, 2024
  • Erschienen in: e+i Elektrotechnik und Informationstechnik
  • Sprache: Englisch
  • DOI: 10.1007/s00502-023-01195-5
  • ISSN: 0932-383X; 1613-7620
  • Schlagwörter: Electrical and Electronic Engineering
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  • Beschreibung: <jats:title>Abstract</jats:title><jats:p>This paper presents the design of a self-clocked 12-bit non-binary fully differential SAR-ADC using the SKY130 open-source PDK. The entire mixed-signal circuit design and layout were created with free and open-source software. The ADC reaches a sample rate of up to 1.44 MS/s at 1.8 V supply while consuming 703 <jats:inline-formula><jats:alternatives><jats:tex-math>$$\upmu$$</jats:tex-math><mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"> <mml:mi>μ</mml:mi> </mml:math></jats:alternatives></jats:inline-formula>W of power on a small 0.175 mm<jats:inline-formula><jats:alternatives><jats:tex-math>$${}^{2}$$</jats:tex-math><mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"> <mml:msup> <mml:mi /> <mml:mn>2</mml:mn> </mml:msup> </mml:math></jats:alternatives></jats:inline-formula> area. A configurable decimation filter can increase the ADC resolution up to 16 bits while using an oversampling factor of 256. A 9‑bit thermometer-coded and 3‑bit binary-coded DAC matrix using a 448 aF waffle-capacitor results in a total capacitance of 1.83 pF per input. Realizations of configurable analog functions using the form factor of SKY130 high-density standard cells allow the parametrization of an analog circuit in a hardware description language and hardening of the macro in an intentionally digital workflow.</jats:p>