H - Electricity – 02 – M
Patent
H - Electricity
02
M
H02M 3/142 (2006.01) G05F 1/573 (2006.01)
Patent
CA 2189851
The present invention concerns a voltage regulator wherein the series pass transistor and an amplification transistor are of complementary types. Supply current flows from the DC supply source through the emitter-collector path of the series pass transistor to the load. The amount of this current is controlled by a negative feedback control signal coupled from the regulated output voltage to the base electrode of the amplification transistor, which in turn drives the base of the series pass transistor. The emitter electrode of the amplification transistor is coupled to a voltage which is less than the regulated DC output voltage so that drive requirements for the pair of transistors is reduced.
La présente invention concerne un régulateur de tension dans lequel un transistor ballast et un transistor d'amplification sont de type complémentaire. Un courant d'alimentation s'écoule de la source d'alimentation en courant continu en passant par la voie émettrice-collectrice du transistor ballast pour se diriger vers la charge. Le volume de courant est commandé par un signal de commande de contre-réaction couplé à partir de la tension de sortie régulée à l'électrode de base du transistor d'amplification, qui, à son tour, commande la base du transistor ballast. L'électrode émettrice du transistor d'amplification est couplée à une tension qui est inférieure à la tension de sortie c.c. régulée de façon à réduire les besoins en courant d'excitation de la paire de transistors.
Craig Wilson And Company
Thomson Consumer Electronics Inc.
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