Low power voltage regulator circuit for use in an integrated...

Details Low power voltage regulator circuit for use in an integrated... Low power voltage regulator circuit for use in an integrated...

G - Physics

05

F

G05F 1/46 (2006.01)

Patent

CA 2403048

A voltage regulator circuit (11) that receives an input signal (450) and provides an output signal (600) that is clamped at a specified voltage desired for an internal circuit. The disclosed voltage regulator circuit includes a plurality of subcircuits including a voltage tracking subcircuit (500) in which the output voltage tracks the input voltage with no voltage drop when the input voltage starts to rise from zero volts. In the input voltage increases to a desired voltage level for the internal circuit, the voltage tracking subcircuit (500) clamps the output voltage to remain at that voltage. If the input voltage further increases to a higher voltage, the voltage tracking subcircuit (500) is disabled and one of a plurality of voltage maintaining subcircuits (550, 560, 570) takes control so that the output voltage remains at the desired voltage for the internal circuit.

Cette invention concerne un circuit de régulateur de tension (11) qui reçoit un signal d'entrée (450) et produit un signal de sortie (600) calé sur une tension spécifiée requise pour un circuit interne. Le circuit de régulateur de tension selon l'invention comprend plusieurs sous-circuits, dont un sous-circuit de suite de tension (500) dans lequel la tension de sortie suit la tension d'entrée sans chuter au moment où la tension d'entrée commence à monter à partir de zéro. A l'entrée, la tension augmente jusqu'au niveau requis pour le circuit interne cependant que le sous-circuit de suite (500) se cale sur la tension de sortie et reste à ce niveau de tension. Si la tension d'entrée continue d'augmenter au delà de ce niveau, le sous-circuit (500) est mis hors service et l'un des sous-circuits de maintien de tension (550, 560, 570) prend le relais de sorte que la tension de sortie reste à la tension requise pour le circuit interne.

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