Multiple output CMOS current amplifier

• Autorzy: Pankiewicz B.

Identyfikatory

DOI

10.1515/bpasts-2016-0034

• Języki publikacji: EN

Abstrakty

EN

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.

Słowa kluczowe

EN

current amplifier; current follower; current mirror; CMOS technology

PL

wzmacniacz prądowy; prąd; technologia CMOS

• Wydawca: Polska Akademia Nauk, Wydział IV Nauk Technicznych
• Czasopismo: Bulletin of the Polish Academy of Sciences. Technical Sciences
• Rocznik: 2016
• Tom: Vol. 64, nr 2
• Strony: 301--306
• Opis fizyczny: Bibliogr. 10 poz., rys., wykr., tab.

Twórcy

autor

Pankiewicz B.

• Faculty of Electronics, Telecommunications and Informatics, Gdańsk University of Technology, 11/12 Narutowicza St., 80-233 Gdańsk, Poland

Bibliografia

• [1] J. Parnklang and W. Nanthanawanitch, “CMOS Current Follower Circuits”, Proc. TENCON 99, 1030-1033 (1999).
• [2] H. A. Alzaher and M. Ismail, “Robust low-distortion wideband CMOS current follower”, Electronics Letters 35 (25), 2203‒2204 (1999).
• [3] Filanovsky, I.M., Järvenhaara, J.K., Tchamov, N.T.: “On Design of Low-Voltage CMOS Current Amplifiers”, Proc. IEEE MWSCAS, 563-566 (2014).
• [4] S.I. Liu, J.J Chen and J.H. Tsay, ”New insensitive notch and all pass filters with single current follower”, Electronics Letters 27 (19), 1712 - 1713 (1991).
• [5] H. A. Alzaher and M. Ismail, ”Current-mode universal filter using unity gain cells”, Electronics Letters 35 (25), 2198-2200 (1999).
• [6] J. Jerabek, R. Sotner and K. Vrba, ”Comparison of the SITO Current-Mode Universal Filters Using Multiple-Output Current Followers”, Proc. 35th Int. Conf. on Telecommunications and Signal Processing, 406-410 (2012).
• [7] A. Malcher, “Modified current differencing transconductance amplifier - new versatile active element”, Bull. Poll. Ac.: Tech. 60 (4), 739-750, (2012).
• [8] G. W. Roberts and A. S. Sedra, “Adjoint networks revisited”, Proc. IEEE Int. Symp. Circuits Syst., 540-544, 1990.
• [9] S. Koziel and S. Szczepanski, General Approach to Continuous- Time OTA-C Filters, Wydawnictwa Komunikacji i Łączności, Warsaw, (2011).
• [10] A. S. Sedra and K. C. Smith, Microelectronic circuits, Oxford University Press, New York, (2004).

Uwagi

PL

Opracowanie ze środków MNiSW w ramach umowy 812/P-DUN/2016 na działalność upowszechniającą naukę.