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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" }