Publication detail

Active-only variable-gain low-pass filter for dual-mode multiphase sinusoidal oscillator application

PROMMEE, P. MANOSITTHICHAI, N. KHATEB, F.

Original Title

Active-only variable-gain low-pass filter for dual-mode multiphase sinusoidal oscillator application

Type

journal article in Web of Science

Language

English

Original Abstract

This research presents the active-only low-pass (LP) filter whose pole frequency and gain are independently tunable by means of the bias current manipulation. The realization of the proposed LP filter required one operational amplifier (OA), two operational transconductance amplifiers (OTA), and two MOS transistors. The multiphase sinusoidal oscillator (MSO) was subsequently realized by cascading n LP filters (n = 3) and loop-backing the output of the last LP filter to the input of the first LP filter. Simulations were carried out and the results revealed that the MSO could simultaneously achieve the low impedance voltage and high impedance current outputs without the circuit topology alteration. The frequency of oscillation (FO) and the condition of oscillation (CO) could also be electronically tuned without disturbing each other. Furthermore, the sinusoidal signal of the MSO exhibited a relatively low total harmonic distortion (THD) of around 0.8% at 2.75MHz. To verify, a prototype of the active-only LP-based MSO (n = 3) was constructed and the experiments performed. The experimental findings were agreeable with the simulation results.

Keywords

Low-pass filter, Sinusoidal oscillator, tunable, low-voltage, active-only

Authors

PROMMEE, P.; MANOSITTHICHAI, N.; KHATEB, F.

Released

12. 6. 2017

Publisher

TUBITAK SCIENTIFIC & TECHNICAL RESEARCH COUNCIL TURKE

Location

Turkey

ISBN

1300-0632

Periodical

TURK J ELECTR ENG CO

Year of study

2017 (25)

Number

, IF: 0.578

State

Republic of Turkey

Pages from

4326

Pages to

4340

Pages count

15

URL

http://dx.doi.org/10.3906/elk-1702-159

BibTex

@article{BUT136490,
  author="Pipat {Prommee} and Narongsak {Manositthichai} and Fabian {Khateb}",
  title="Active-only variable-gain low-pass filter for dual-mode multiphase sinusoidal oscillator application",
  journal="TURK J ELECTR ENG CO",
  year="2017",
  volume="2017 (25)",
  number=", IF: 0.578",
  pages="4326--4340",
  doi="10.3906/elk-1702-159",
  issn="1300-0632",
  url="http://dx.doi.org/10.3906/elk-1702-159"
}