A cartesian loop transmitter

Details A cartesian loop transmitter A cartesian loop transmitter

H - Electricity

04

B

H04B 1/04 (2006.01) H03F 1/30 (2006.01) H03F 1/32 (2006.01)

Patent

CA 2221685

A cartesian loop transmitter is disclosed. The disclosed cartesian loop includes various fine and coarse power control circuits that allow power control over a wide range and that allow fine control in very small increments. The disclosed cartesian loop also includes a loop filter which minimized noise in the loop, a DC nullin circuit, an instability detection circuit, a mask detection circuit, an undervoltage protection circuit, a temperature protection circuit and an automatic phase calibration circuit.

L'invention concerne un émetteur à boucle cartésienne. Cette boucle cartésienne comprend des circuits de réglage fin et grossier de puissance, qui permettent d'assurer un réglage de puissance sur une large bande, et un réglage fin en très faibles incréments. La boucle cartésienne, selon l'invention, comprend également un filtre à boucle qui réduit le bruit dans la boucle, un circuit d'annulation de courant continu, un circuit de détection d'instabilité, un circuit de détection de masque, un circuit de protection de sous-tension, un circuit de protection contre la température et un circuit de calibrage de phase automatique.

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