Title :
On an implementation of differential and quadrature Colpitts injection-locked frequency dividers
Author :
Yodprasit, Uroschanit ; Enz, Christian C.
Author_Institution :
Ecole Polytechnique Federale de Lausanne
Abstract :
Two realizations of a differential and a quadrature injection-locked frequency dividers are proposed. The topologies utilize the injection-locking mechanism of a bipolar-junction transistor (BJT) single-ended Colpitts oscillator where the locking signal is injected through the base terminal. By considering the phase relationship between the input and the output signals under the divide-by-2 locking condition, a differential and a quadrature versions can be implemented without significantly modifying the single-ended topology. The theory on the prediction of the maximum relative locking range of the three versions of the dividers favorably match the experimental results using discrete components
Keywords :
bipolar transistor circuits; frequency dividers; injection locked oscillators; bipolar junction transistor; differential oscillator; divide-by-two locking condition; injection-locked frequency dividers; maximum relative locking range; quadrature Colpitts oscillator; single-ended topology; Circuit topology; Frequency conversion; Frequency synchronization; Injection-locked oscillators; Leg; Output feedback; Predictive models; Radio transceivers; Resonant frequency; 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.2006.1693578
