H - Electricity – 03 – B
Patent
H - Electricity
03
B
H03B 1/00 (2006.01) H03K 3/0231 (2006.01) H03K 3/282 (2006.01) H04L 7/00 (2006.01)
Patent
CA 2201697
A relaxation oscillator, such as a voltage controlled oscillator (VCO), with automatic swing control feedback which dynamically monitors the voltage swing across a capacitor and adjusts the oscillator threshold voltage, at which reversal of the polarity of the charging/discharging current occurs, to maintain the effective voltage swing at a constant level. The improved relaxation oscillator provides a very wide linear range of frequency variation versus control voltage (or current) and allows for the extendibility of linear operation to or near the maximum frequency that can be practically achieved by the oscillator circuitry.
L'invention est un oscillateur à relaxation, tel qu'un oscillateur commandé par la tension, qui, utilisant une rétroaction de commande automatique d'excursion, surveille dynamiquement l'excursion de tension aux bornes d'un condensateur et, aux inversions de signe du courant de charge et de décharge, ajuste sa tension de seuil de façon à maintenir l'excursion de tension effective à une valeur fixe. L'oscillateur à relaxation amélioré de l'invention a une gamme linéaire de variations de fréquence très large en fonction de la tension (ou du courant) de commande et permet d'étendre le fonctionnement linéaire jusqu'à la fréquence maximale que les circuits de l'oscillateur peuvent atteindre, ou tout près.
Hashjani Tirdad Sowlati
Shakiba Mohammad Hossein
Bereskin & Parr
Gennum Corporation
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