A CMOS transconductance amplifier architecture with wide tuning range for very low frequency applications Academic Article

abstract

• A pseudodifferential CMOS operational transconductance amplifier (OTA) with wide tuning range and large input voltage swing has been designed for very small G M's (of the order of a few nanoamperes per volt.) The OTA is based on a modified four-quadrant multiplier architecture with current division. A common-mode feedback circuit (CMFB) structure has been proposed and designed using floating-gate transistors to handle large differential signals. Large on-chip capacitors are emulated through impedance scaling circuits. The circuits, fabricated in a 1.2 m CMOS process, have been used to design a fourth-order bandpass filter and a ralaxation oscillator. Experimental results are in good agreement with the theoretical results.

authors

• Silva-Martinez, Jose

published proceedings

• IEEE JOURNAL OF SOLID-STATE CIRCUITS

author list (cited authors)

• Veeravalli, A., Sanchez-Sinencio, E., & Silva-Martinez, J.

citation count

• 64

complete list of authors

• Veeravalli, A||Sanchez-Sinencio, E||Silva-Martinez, J

publication date

• June 2002

publisher

• Institute of Electrical and Electronics Engineers (IEEE)  Publisher

keywords

• Cmfb
• Current Division
• Floating Gate
• Low-frequency Circuits
• Ota
• Small G(m)

Digital Object Identifier (DOI)

• 10.1109/JSSC.2002.1004583

start page

• 776

end page

• 781

volume

• 37

issue

• 6

URL

• http%3A%2F%2Fdx.doi.org%2F10.1109%2Fjssc.2002.1004583