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| Number | Title | Issue Date |
| 8044617 | Motor control circuit and operation method thereof A motor control circuit for controlling a motor includes a brake circuit and a control circuit. The brake circuit is for making the motor enter a braking state. The control circuit is for detecting a residual energy of the motor in the braking state. When the residu... | 10/25/2011 |
| 7728683 | Phase recovery circuit A phase recovery circuit for avoiding noise interfering with the clock signal generated from an oscillator is disclosed. The phase recovery circuit includes a noise detector, a phase detector, and a phase locker. The noise detector detects noise and accordingly gene... | 06/01/2010 |
| 7649757 | Leakage-inductance energy recycling circuit and flyback converter with leakage-inductance energy recycling circuit A flyback converter with a leakage-inductance energy recycling circuit includes a transformer and a leakage-inductance energy recycling circuit. The leakage-inductance energy recycling circuit includes a clamping circuit, an energy storage circuit, and a switch conn... | 01/19/2010 |
| 7646191 | Method for detecting leading edge blanking parameter of power management chip A method for detecting a leading edge blanking parameter of a power management chip includes generating a pulse signal and inputting the pulse signal to the power management chip, wherein the amplitude of the pulse signal will cause a PWM signal of the power managem... | 01/12/2010 |
| 7642733 | Driving circuit for light emitting device with compensation mechanism and driving method thereof A light emitting device driving circuit, includes: a switch device, a comparator, a driving module, a time counting circuit and a compensation module. The switch device is turned on or off according to a control signal for controlling a driving current flowing throu... | 01/05/2010 |
| 7619909 | Control circuit for adjusting leading edge blanking time and power converting system using the same control circuit A control circuit for adjusting leading edge blanking time is disclosed. The control circuit is applied to a power converting system. The control circuit adjusts a leading edge blanking time according to a feedback signal relative to a load connected to the output t... | 11/17/2009 |
| 7576620 | Pseudo random clock generator A pseudo random clock generator includes a clock generator for generating a clock signal. A pseudo random code generator receives the clock signal and thereby generating a pseudo random code. A code limiter enables the value of the pseudo random code being unchanged... | 08/18/2009 |
| 7573730 | Charging device with boundary mode control A charging device with boundary mode control is disclosed. The charging device includes a transformer, a power switch, a detection circuit and a pulse-width modulation (PWM) controller. The power switch is electrically connected to one end of a primary-side winding ... | 08/11/2009 |
| 7541750 | DC to DC converter with load open detection and related method thereof Disclosed is a DC to DC converter, which comprises: a transforming circuit, for transforming an input voltage to an output voltage; a comparator, for comparing a reference voltage and a feedback voltage proportional to the output voltage to generate a comparing sign... | 06/02/2009 |
| 7511974 | High voltage charging circuit A high voltage charging circuit is provided with the ability of rapid charging. The circuit is composed of a turn-on control circuit, a turn-off control circuit and a transistor. The turn-on control circuit is adopted to set a turn-on time of a transistor such that ... | 03/31/2009 |
| 7495286 | High-voltage semiconductor device structure A high-voltage semiconductor device structure is provided, which includes a drain structure having two curved structures that are insulatedly adjacent to each other and alternatively arranged, and a source structure, a drain extension structure, and a gate structure... | 02/24/2009 |
| 7480159 | Switching-mode power converter and pulse-width-modulation control circuit with primary-side feedback control A pulse-width-modulation control circuit of a switching-mode power converter with a primary-side feedback control is disclosed. The switching-mode power converter includes a transformer, a power switch, a current sensing resistor and the pulse-width-modulation contr... | 01/20/2009 |
| 7378824 | Voltage converter capable of avoiding voltage drop occurring in input signal A voltage converter for providing an output voltage signal at an output port according to an input voltage signal is disclosed. The voltage converter comprises a feedback circuit, a transmission switch circuit, a voltage converting circuit, and a pre-bias circuit. T... | 05/27/2008 |
| 7330361 | Capacitor charging module Disclosed is a capacitor charging module, comprises: a power switch; a power delivery device controlled by the power switch, for providing a charging current to the output capacitor according to a voltage source; a voltage divider for providing a feedback voltage ac... | 02/12/2008 |
