Quadrature sinusoidal oscillator based on log-domain high-pass and low-pass filters

Author

Prommee, Pipat ; Prapakorn, Nattawit ; Somdunyakanok, M.

Author_Institution

Dept. of Telecommun. Eng., King Mongkut´s Inst. of Technol. Ladkrabang, Bangkok, Thailand

fYear

2011

fDate

7-10 Aug. 2011

Firstpage

1

Lastpage

4

Abstract

A log-domain current-mode quadrature sinusoidal oscillator (QSO) based on low-pass (LP) and high-pass (HP) filters is presented. The log-domain QSO is realized by using only 18 NPN transistors and 2 grounded capacitors for achieving low-power and fast response. The proposed oscillator uses a cascade connecting the LP and HP which can be electronically tuned through bias current. Frequency of oscillation can be tuned over a wide-range with a low-power supply as 2V which is suitable for IC production. The power consumption is obtained around 5.5mW at 100μA of bias current. The oscillation frequency is controlled over four decades of frequency. The total harmonic distortion of QSO at 10.63MHz is obtained around 1.25%. The proposed circuit is suitable for high-frequency applications. PSpice simulation confirms the theoretical results.

Keywords

SPICE; high-pass filters; low-pass filters; low-power electronics; orthopaedics; oscillators; NPN transistors; PSpice simulation; current 100 muA; frequency 10.63 MHz; grounded capacitors; high pass filters; log domain quadrature sinusoidal oscillator; low pass filters; oscillation frequency; total harmonic distortion; wide range low power supply; Attenuators; Modulation; Oscillators; High-frequency; High-pass filer; Log-domain filtering; Low-voltage; Sinusoidal Oscillator;

fLanguage

English

Publisher

ieee

Conference_Titel

Circuits and Systems (MWSCAS), 2011 IEEE 54th International Midwest Symposium on

Conference_Location

Seoul

ISSN

1548-3746

Print_ISBN

978-1-61284-856-3

Electronic_ISBN

1548-3746

Type

conf

DOI

10.1109/MWSCAS.2011.6026490

Filename

6026490