Publication detail

A Single-Ended and Fully-Differential Universal Current-Mode Frequency Filter with MO-CF and DACA Elements

LANGHAMMER, L. JEŘÁBEK, J. POLÁK, J. PÁNEK, D.

Original Title

A Single-Ended and Fully-Differential Universal Current-Mode Frequency Filter with MO-CF and DACA Elements

English Title

A Single-Ended and Fully-Differential Universal Current-Mode Frequency Filter with MO-CF and DACA Elements

Type

journal article

Language

en

Original Abstract

The paper presents proposal of the 2nd-order universal frequency filter. The presented filter operates in the current-mode and it is designed in the single-ended and fullydifferential form. Signal-flow graphs (SFG) method has been used in the proposal. The proposed filter is employing multioutput current followers (MO-CFs) and digitally adjustable current amplifiers (DACAs) as active elements. The pole frequency of the filter can be controlled without disturbing its quality factor. Functionality of the proposed filter in both S-E and F-D form has been verified by PSpice simulations using available models of used active elements and also by experimental measurements. A comparison of simulation and experimental results of the S-E and F-D form of the presented filter is made. Subsequently, a comparison of experimental results of both forms of the filter is also included.

English abstract

The paper presents proposal of the 2nd-order universal frequency filter. The presented filter operates in the current-mode and it is designed in the single-ended and fullydifferential form. Signal-flow graphs (SFG) method has been used in the proposal. The proposed filter is employing multioutput current followers (MO-CFs) and digitally adjustable current amplifiers (DACAs) as active elements. The pole frequency of the filter can be controlled without disturbing its quality factor. Functionality of the proposed filter in both S-E and F-D form has been verified by PSpice simulations using available models of used active elements and also by experimental measurements. A comparison of simulation and experimental results of the S-E and F-D form of the presented filter is made. Subsequently, a comparison of experimental results of both forms of the filter is also included.

Keywords

Active filters, Analog circuits, Current-mode circuits, Differential amplifiers, Frequency control

Released

31.08.2016

Pages from

43

Pages to

48

Pages count

6

BibTex


@article{BUT122908,
  author="Lukáš {Langhammer} and Jan {Jeřábek} and Josef {Polák} and David {Pánek}",
  title="A Single-Ended and Fully-Differential Universal Current-Mode Frequency Filter with MO-CF and DACA Elements",
  annote="The paper presents proposal of the 2nd-order universal frequency filter. The presented filter operates in the current-mode and it is designed in the single-ended and fullydifferential form. Signal-flow graphs (SFG) method has been used in the proposal. The proposed filter is employing multioutput current followers (MO-CFs) and digitally adjustable current amplifiers (DACAs) as active elements. The pole frequency of the filter can be controlled without disturbing its quality factor. Functionality of the proposed filter in both S-E and F-D form has been verified by PSpice simulations using available models of used active elements and also by
experimental measurements. A comparison of simulation and experimental results of the S-E and F-D form of the presented filter is made. Subsequently, a comparison of experimental results of both forms of the filter is also included.",
  chapter="122908",
  doi="10.4316/AECE.2016.03007",
  number="3",
  volume="16",
  year="2016",
  month="august",
  pages="43--48",
  type="journal article"
}