Title :
VCO linearisation by frequency feedback
Author :
Gustrau, J. ; Fiechtner, F. ; Hoffmann, M.
Author_Institution :
Ulm Univ., Germany
Abstract :
We demonstrate, how a voltage controlled oscillator is linearised by frequency feedback independently of the VCO-characteristic. The VCO is replaced by a controlled frequency locked loop. Hereby, the VCO characteristic is substituted by the inverse function of the frequency detector characteristic, which, in our case, is linear to a great extent. A 70 MHz oscillator was built to verify the principle.
Keywords :
VHF oscillators; feedback oscillators; linearisation techniques; voltage-controlled oscillators; 70 MHz; VCO linearisation; controlled frequency locked loop; frequency detector characteristic; frequency feedback; inverse function; voltage controlled oscillator; Delay lines; Detectors; Diodes; Feedback; Filters; Frequency locked loops; Frequency synthesizers; Radiofrequency integrated circuits; Voltage control; Voltage-controlled oscillators;
Conference_Titel :
Radio Frequency Integrated Circuits (RFIC) Symposium, 1998 IEEE
Conference_Location :
Baltimore, MD, USA
Print_ISBN :
0-7803-4439-1
DOI :
10.1109/RFIC.1998.682065
