Logitech International S.A.
Doorbell system with pulse-driven boost rectifier

Abstract:

In some embodiments, a power supply in a doorbell system includes a boost rectifier circuit with a plurality of active devices arranged in a bridge topology that are configured to receive an AC input voltage, generate a DC output voltage by rectifying the AC input voltage, drive an electric load using the rectified DC voltage, and boost an amplitude of the AC input voltage. Two of the plurality of active devices in the boost rectifier circuit may be pulse driven and can control an operation of a mechanical or digital chime device. The chime device can include a solenoid and the boost rectifier circuit may utilize the solenoid as an energy storage element to facilitate the boosting of the amplitude of the AC input voltage. The boost rectifier circuit may boost the AC input voltage by at least a multiplication factor of two.