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Multiple output CMOS current amplifier

Abstrakt

In this paper the multiple output current amplifier basic cell is proposed. The triple output current mirror and current follower circuit are described in detail. The cell consists of a split nMOS differential pair and accompanying biasing current sources. It is suitable for low voltage operation and exhibits highly linear DC response. Through cell devices scaling, not only unity, but also any current gains are achievable. As examples, a current amplifier and bandpass biquad section designed in CMOS TSMC 90nm technology are presented. The current amplifier is powered from a 1.2V supply. MOS transistors scaling was chosen to obtain output gains equal to –2, 1 and 2. Simulated real gains are –1.941, 0.966 and 1.932 respectively. The 3dB passband obtained is above 20MHz, while current consumption is independent of input and output currents and is only 7.77μA. The bandpass biquad section utilises the previously presented amplifier, two capacitors and one resistor, and has a Q factor equal to 4 and pole frequency equal to 100 kHz.

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Informacje szczegółowe

Kategoria:
Publikacja w czasopiśmie
Typ:
artykuł w czasopiśmie wyróżnionym w JCR
Opublikowano w:
Bulletin of the Polish Academy of Sciences-Technical Sciences nr 64, wydanie 2, strony 301 - 306,
ISSN: 0239-7528
Rok wydania:
2016
Opis bibliograficzny:
Pankiewicz B.: Multiple output CMOS current amplifier// Bulletin of the Polish Academy of Sciences-Technical Sciences. -Vol. 64, iss. 2 (2016), s.301-306
DOI:
Cyfrowy identyfikator dokumentu elektronicznego (otwiera się w nowej karcie) 10.1515/bpasts-2016-0034
Weryfikacja:
Politechnika Gdańska

wyświetlono 145 razy

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