Patent application number | Description | Published |
20090032676 | MOUNTING APPARATUS FOR AIR FRESHENER - A mounting apparatus for securely fixing an air freshener such as a fragrance bag includes a panel of a computer and a fixing box accommodating the fragrance bag. One end of the box is pivotably mounted to the panel, and the other end is detachably fixed to the panel. Because of the mounting apparatus, the fragrance bag can't drop from the fixing box even when the computer is moved. | 02-05-2009 |
20090085554 | POWER SUPPLY CIRCUIT FOR MOTHERBOARD - A power supply circuit for a motherboard includes a first resistor, a second resistor, a Schottky diode, and a direct current (DC) voltage source. The Schottky diode includes a first anode, a second anode, and a cathode. The first anode of the Schottky diode is respectively coupled to terminals of the first and second resistors, another terminal of each of the first and second resistors is respectively coupled to a power supply and ground. The second anode of the Schottky diode is coupled to the DC voltage source, the cathode of the Schottky diode is coupled to a south bridge. | 04-02-2009 |
20090103713 | CIRCUIT FOR PREVENTING UNAUTHORIZED ACCESS TO PHONES - An exemplary circuit for preventing unauthorized access to a phone includes three transistors, a zener diode, and a rectifier comprising two input terminals for receiving an AC voltage from the telecommunication office, a negative output terminal connected to the phone via a first resistor, and a positive output terminal connected to the phone. The anode and the cathode of the zener diode are respectively connected to the positive output terminal and the base of the first transistor. The collectors of the first and third transistors are connected to the base of the second transistor, which is connected to the positive and negative output terminals respectively via two capacitors. The collectors of the first and second transistors are connected to the positive output terminal respectively via a second resistor and a buzzer. Emitters of the three transistors are connected to the negative output terminal of the rectifier. | 04-23-2009 |
20090160545 | DUAL VOLTAGE SWITCHING CIRCUIT - A dual voltage switching circuit includes an input terminal receiving a control signal, an output terminal, three transistors, and a Zener diode. The gate of the first transistor is connected to the input terminal. The drain of the first transistor is connected to a standby power and the gate of the second transistor. The drain of the second transistor is connected to a first system power and the gate of the third transistor. The sources of the first transistor and the second transistor are grounded. The drain of the third transistor is connected to the input terminal. The source of the third transistor is connected to a second system power. The anode of the Zener diode is connected to the standby power. The cathode of the Zener diode is connected to the output terminal. The output terminal selectively outputs the standby power or the second system power. | 06-25-2009 |
20090231000 | MOTHERBOARD POWER ON CIRCUIT - A motherboard power on circuit includes a switch connector, an impedance circuit, and a super I/O chip. The impedance circuit includes a first resistor, a second resistor, and a capacitor. A terminal of the first resistor is connected to the power on terminal of the switch connector. The other terminal of the first resistor is connected to the power on terminal of the super I/O chip, a terminal of the second resistor, and a terminal of the capacitor. The other terminals of the second resistor and the capacitor are connected to a power source and ground respectively. | 09-17-2009 |
20140347775 | BATTERY PROTECTION CIRCUIT - A battery protection circuit includes a control module, a first switch, and a loading module. The control module includes a second switch. A base terminal of the second switch is connected to a positive terminal of a battery, and an emitter terminal of the second switch is grounded. The first switch includes a gate terminal, a source terminal, and a drain terminal. The gate terminal is connected to the control module and further connected to a collector terminal of the second switch, and the source terminal is grounded. The drain terminal is connected to a first capacitor, and the first capacitor is grounded. The loading module is connected to the battery. When the loading module is abnormal, the gate terminal receives a control signal to switch off the first switch. | 11-27-2014 |
20150022922 | POWER SUPPLY CIRCUIT FOR POWER CONTROL CHIPS - A power supply circuit for power control chips includes a voltage control circuit, a voltage output circuit and a feedback protect circuit. The voltage control circuit receives a first DC voltage, and outputs a voltage driving signal according to the first DC voltage. The voltage output circuit receives the voltage driving signal, and outputs a second DC voltage to a load according to the voltage driving signal. The feedback protect circuit receives the second DC voltage. The feedback protect circuit is turned on and connects the voltage control circuit to ground when the second DC voltage is over voltage. The voltage control circuit discharges to ground via the feedback protect circuit. | 01-22-2015 |
20150155774 | SURGING CURRENT SUPPRESSION CIRCUIT - A surging current suppression circuit includes a voltage regulating circuit and a switch circuit. The voltage regulating circuit receives a first DC voltage, and converts the first DC voltage to a second DC voltage. The switch circuit receives the second DC voltage, and outputs a working current according to the second DC voltage. The switch circuit outputs the working current to the electronic device when the working current is lower than a rate current of the electronic device. The working current is grounded via the switch circuit when the working current is higher than the rate current of the electronic device; and the electronic device can not receive the working current when a surging current occurred. | 06-04-2015 |