Title :
Enhanced MESFET VCO injection-locking bandwidth using low frequency feedback techniques
Author :
Heng-Chia Chang ; York, R.A.
Author_Institution :
Dept. of Electr. & Comput. Eng., California Univ., Santa Barbara, CA, USA
Abstract :
A simple scheme for enhancing the locking range and capture range of MESFET VCOs is presented using a low frequency DC-coupled amplifier. This circuit is based on phase-locked loop (PLL) techniques; in the present case the MESFET VCO also provides the function of a mixer or phase detector. A 10 GHz prototype was constructed which demonstrated a locking range more than double that of the isolated VCO injection-locking range over the same range of injected signal power.
Keywords :
MESFET circuits; feedback oscillators; injection locked oscillators; microwave oscillators; phase locked loops; voltage-controlled oscillators; 10 GHz; LF DC-coupled amplifier; MESFET VCO; PLL techniques; SHF; injection-locking bandwidth; low frequency feedback techniques; phase-locked loop; Bandwidth; Detectors; Feedback; Frequency; Injection-locked oscillators; MESFETs; Phase detection; Phase locked loops; Voltage; Voltage-controlled oscillators;
Conference_Titel :
Microwave Symposium Digest, 1996., IEEE MTT-S International
Conference_Location :
San Francisco, CA, USA
Print_ISBN :
0-7803-3246-6
DOI :
10.1109/MWSYM.1996.512224
