Title :
A quadrature sinusoidal oscillator with phase-preserving linear frequency control and independent static amplitude control
Author :
Loizos, Dimitrios N. ; Sotiriadis, Paul P.
Author_Institution :
Dept. of Electr. & Comput. Eng., Johns Hopkins Univ., Baltimore, MD
Abstract :
A Gm-C architecture for a quadrature, sinusoidal oscillator with instantaneous, phase-preserving, linear frequency control and independent, static amplitude control is presented. The architecture is analyzed and closed-form expressions are given for both frequency and amplitude. An implementation of the architecture using general purpose discrete bipolar transistors has been tested. Simulation results and measurements are demonstrated and compared to theory. The wide frequency range of tunability and the low total harmonic distortion observed, as well as the inherent phase preservation make the architecture appropriate for use in analog communication schemes
Keywords :
bipolar transistors; frequency control; harmonic distortion; oscillators; analog communication schemes; discrete bipolar transistors; harmonic distortion; independent static amplitude control; inherent phase preservation; phase-preserving linear frequency control; quadrature sinusoidal oscillator; Communication system control; Computer architecture; Control systems; Feedback; Frequency control; Frequency shift keying; Phase detection; Total harmonic distortion; Voltage control; Voltage-controlled oscillators;
Conference_Titel :
Circuits and Systems, 2006. ISCAS 2006. Proceedings. 2006 IEEE International Symposium on
Conference_Location :
Island of Kos
Print_ISBN :
0-7803-9389-9
DOI :
10.1109/ISCAS.2006.1693765