H - Electricity – 03 – K
Patent
H - Electricity
03
K
H03K 5/00 (2006.01) H03D 7/16 (2006.01) H04B 1/40 (2006.01) H03B 27/00 (2006.01)
Patent
CA 2127271
A quadrature generator (975, 1075) for generating a pair of pulse trains maintained in perfect phase quadrature with one another. The quadrature generator (975, 1075) includes a feedback control loop for altering the duty cycle of an oscillating signal applied to a master-slave flip-flop pair (450, 650) configured to generate a pair of pulse trains maintained in a relative phase relationship. The feedback control loop controls the duty cycle of the oscillating signal applied to the master-slave flip-flop pair (54, 58) which, in turn, is determinative of the phase relationship between the pulse train pair generated by the master-slave flip-flop pair (54, 58). When the pulse trains generated by the flip-flop pair (450) are beyond phase quadrature, a control signal generated by the feedback control loop alters the duty cycle of the oscillating signal applied to the flip-flop pair (450); to alter the phase relationship between the pulse trains of the pulse train pair.
L'invention est un générateur (975, 1075) servant à produire une paire de trains d'impulsions parfaitement en quadrature l'un avec l'autre. Ce générateur comprend une boucle de commande à rétroaction qui sert à faire varier le rapport cyclique d'un signal oscillant appliqué à une paire de bascules maître-esclave (450, 650) configurée de façon à produire une paire de trains d'impulsions en relation de phase fixe. Quand ces trains d'impulsions ne sont plus en quadrature, cette boucle de commande produit un signal qui fait varier le rapport cyclique du signal oscillant appliqué à la paire de bascules (450) pour faire varier le déphasage entre les deux trains d'impulsions.
Gowling Lafleur Henderson Llp
Motorola Inc.
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