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| Number | Title | Issue Date |
| 8054603 | Power converter, short detection circuit thereof, and method for detecting short A short detection circuit, for detecting an output node corresponding to an output voltage converted from an input voltage of a power converter, includes a first current source, a charging/discharging unit, a comparator, and a logic control unit. The charging/discha... | 11/08/2011 |
| 7982412 | LED circuit with high dimming frequency A LED circuit comprises: an inductor, a group of LEDs, a capacitor, a power MOS and a switching circuit. The inductor is connected to a voltage supply and a first node; the group of LEDs is connected to the first node and a ground potential; the capacitor is connect... | 07/19/2011 |
| 7973598 | Audio power amplifier and a pre-amplifier thereof An audio power amplifier includes a pre-amplifier, an error amplifier, a comparator, a bridge circuit, and a feedback circuit, in which the gain of the pre-amplifier gradually increases when the audio power amplifier is powered on. The comparator generates a PWM sig... | 07/05/2011 |
| 7830202 | Current mirror circuit The present invention discloses a current mirror circuit generating an output current flowing through an output current path according to an input current flowing through an input current path. The current mirror circuit comprises a P type transistor in the output c... | 11/09/2010 |
| 7714646 | Audio power amplifier and a pre-amplifier thereof An audio power amplifier includes a pre-amplifier, an error amplifier, a comparator, a bridge circuit, and a feedback circuit, in which the gain of the pre-amplifier gradually increases when the audio power amplifier is powered on. The comparator generates a PWM sig... | 05/11/2010 |
| 7709963 | Audio power amplifier package An audio power amplifier package includes a non-signal lead, a first non-signal pad, a second non-signal pad and a plurality of bonding wires. The first non-signal pad and the second non-signal pad are disposed on a substrate. The bonding wires connect the non-signa... | 05/04/2010 |
| 7629842 | Class D audio amplifier A class D audio amplifier includes an error amplifier, a comparator, a bridge circuit, a feedback circuit and a silent start circuit. The error amplifier generates an error signal by amplifying a difference between a feedback signal and an audio input signal. The co... | 12/08/2009 |
| 7626429 | Driving circuit to drive an output stage A driving circuit to drive an output stage comprising a high side NMOS and a low side NMOS is provided. The driving circuit comprises: a diode comprising an anode and a cathode, wherein the anode is electrically connected to a first voltage source and the sources of... | 12/01/2009 |
| 7592756 | Driving circuit for light emitting diodes A driving circuit includes a DC-to-DC voltage converter, a current source, a detector and a feedback control circuit. The DC-to-DC voltage converter has a switch and generates a driving voltage on first ends of the series of light emitting diodes, in which a magnitu... | 09/22/2009 |
