Driver circuit for driving a load circuit

摘要

Driver circuits (1) for driving load circuits (2, 3) receive source signals from sources and provide feeding signals to the load circuits (2,3) and charging signals to capacitor circuits (21). These capacitor circuits (21) provide supporting signals to the load circuits (2, 3) in addition to the feeding signals. By providing the driver circuits (1) with control circuits (22) for controlling the supporting signals, the capacitor circuits (21) can become less bulky/costly and/or will limit the lifetime of the driver circuits (1) to a smaller extent. Further, these driver circuits (1) may get improved efficiencies. Said controlling may comprise controlling moments in time at which the supporting signals are offered to the load circuits (2, 3) or not, and/or may comprise controlling sizes of the supporting signals, and/or may be done in response to detection results from detectors (23) for detecting parameters of one or more signals. Said controlling may comprise switching via switches (24).

主权项

1. A device including a driver circuit for driving a load circuit, the driver circuit comprising:
an input terminal configured to receive a source voltage from a source and to provide a feeding current and a charging current, a capacitor circuit configured to receive the charging current and to provide a supporting current, an output terminal configured to receive the feeding current and the supporting current and to provide the feeding current and the supporting current to the load circuit, and a control circuit including,
a switch,a detector configured to detect one of the source voltage and the feeding current, anda control device configured to provide a control signal to the switch to control the switch to provide the supporting current to the load circuit only when the detected one of the source voltage and the feeding current is less than a threshold, wherein the control circuit is configured to inhibit the supporting current from being provided to the load circuit when the detected one of the source voltage and the feeding current exceeds the threshold.