Publication detail

Resistor-less Single-purpose or Reconfigurable Biquads Utilizing Single Z-Copy Controlled-Gain Voltage Differencing Current Conveyor

JEŘÁBEK, J. ŠOTNER, R. POLÁK, J. LANGHAMMER, L. HERENCSÁR, N. PROKOP, R. VRBA, K.

Original Title

Resistor-less Single-purpose or Reconfigurable Biquads Utilizing Single Z-Copy Controlled-Gain Voltage Differencing Current Conveyor

Type

journal article in Web of Science

Language

English

Original Abstract

Presented work deals with applications of the single Z-Copy Controlled-Gain Voltage Differencing Current Conveyor (ZC-CG-VDCC) in single purpose and multifunctional biquadratic voltage- and current-mode active resistor-less filters. Electronically adjustable features of the active device (intrinsic current input resistance Rx, current gain B and transconductance gm) are controlled by DC bias current. These mentioned adjustable features allow interesting possibilities of control of the pole frequency and quality factor. Four voltage-mode solutions realizing low-pass, band-pass, high-pass and band-reject filtering solutions were designed together with two current-mode filters. The current-mode solutions have curious multifunctional capability based on full utilization of electronically controllable parameters of the ZC-CG-VDCC. Two adjustable parameters of the ZC-CG-VDCC (intrinsic current input resistance and transconductance) are used for electronic setting of features of the filter (pole frequency, quality factor, tuning). Control of the third adjustable parameter (current gain) causes reconnection-less change of the transfer function between iAP (inverting all-pass response) and iBR (inverting band-reject responses). Simulation results in PSPICE and Cadence CDS 6 are used to show characteristics of the proposed circuits.

Keywords

Biquads; current gain; electronic control; intrinsic resistance; reconnection-less multifunctional filter; transconductance; z-copy; ZC-CG-VDCC.

Authors

JEŘÁBEK, J.; ŠOTNER, R.; POLÁK, J.; LANGHAMMER, L.; HERENCSÁR, N.; PROKOP, R.; VRBA, K.

Released

31. 3. 2017

ISBN

1793-6454

Periodical

JOURNAL OF CIRCUITS SYSTEMS AND COMPUTERS

Year of study

26

Number

3

State

Republic of Singapore

Pages from

1

Pages to

21

Pages count

21

URL

http://www.worldscientific.com/doi/abs/10.1142/S0218126617500505

Full text in the Digital Library

http://hdl.handle.net/11012/70918

BibTex

@article{BUT128768,
  author="Jan {Jeřábek} and Roman {Šotner} and Josef {Polák} and Lukáš {Langhammer} and Norbert {Herencsár} and Roman {Prokop} and Kamil {Vrba}",
  title="Resistor-less Single-purpose or Reconfigurable Biquads Utilizing Single Z-Copy Controlled-Gain Voltage Differencing Current Conveyor",
  journal="JOURNAL OF CIRCUITS SYSTEMS AND COMPUTERS",
  year="2017",
  volume="26",
  number="3",
  pages="1--21",
  doi="10.1142/S0218126617500505",
  issn="1793-6454",
  url="http://www.worldscientific.com/doi/abs/10.1142/S0218126617500505"
}