Details

Autor(en) / Beteiligte

• Osipov, Dmitry
• Paul, Steffen

Titel

Temperature-Compensated \beta -Multiplier Current Reference Circuit

Ist Teil von

• IEEE transactions on circuits and systems. II, Express briefs, 2017-10, Vol.64 (10), p.1162-1166

Ort / Verlag

IEEE

Erscheinungsjahr

2017

Link zum Volltext

• IEEE_Xplore

Quelle

IEEE/IET Electronic Library (IEL)

Beschreibungen/Notizen

• This brief presents the new simple schematic for the temperature stable current references based on the wellknown β-multiplier circuit. The proposed reference utilizes only four MOS transistors and two lateral PNP transistors, which are usually available in standard CMOS technologies along with one well resistor. The temperature-compensation technique has a low process dependence and needs no trimming. However, resistor trimming can be used to precisely set the output current value. The circuit implementation of the proposed technique was fabricated in a standard 0.35-μm CMOS process to source a 16-μA current. The digital calibration circuit allows setting of the output current in 32 100 nA-steps. The proposed current reference achieves the supply sensitivity of several %/V without the use of the external bandgap voltage reference for the supply regulation. The measured temperature coefficient is 105 ppm/°C over the temperature range from 0 to 110 °C.