Title :
Log-domain all-pass based multiphase sinusoidal oscillator
Author :
Prommee, Pipat ; Somdunyakanok, Montri
Author_Institution :
Dept. of Telecommun. Eng., King Mongkut´´s Inst. of Technol. Ladkrabang, Bangkok, Thailand
Abstract :
This paper describes the design of a current-mode multiphase sinusoidal oscillator (MSO) based on log-domain all-pass network. The first order all-pass filter circuit is realized by first order all-pass filter. In each block of all-pass filter includes ten bipolar transistors and a grounded capacitor. The simulation of three-phase sinusoidal signal generator is carried out by SPICE. The 2.5V power supply is used for achieving the frequency from 700Hz - 70MHz by adjusting the bias currents. For bias currents 100 μA, the frequency of the signal is obtained around 7MHz and total harmonic distortion is measured around 1.5%. The three signal outputs of the proposed MSO are equally spaced in phase and amplitude.
Keywords :
SPICE; all-pass filters; bipolar transistors; capacitors; oscillators; SPICE; bipolar transistor; current 100 muA; current-mode multiphase sinusoidal oscillator; first order all-pass filter circuit; frequency 700 Hz to 70 MHz; grounded capacitor; harmonic distortion; log-domain all-pass based multiphase sinusoidal oscillator; log-domain all-pass network; three-phase sinusoidal signal generator; voltage 2.5 V; Capacitors; Filtering algorithms; Filtering theory; Low pass filters; Oscillators; Power harmonic filters; All-pass Filter; Electronically-controlled; High-frequency; Log-domain; Low-voltage; Multiphase Sinusoidal Oscillator;
Conference_Titel :
Telecommunications and Signal Processing (TSP), 2012 35th International Conference on
Conference_Location :
Prague
Print_ISBN :
978-1-4673-1117-5
DOI :
10.1109/TSP.2012.6256314
