| Patent application number | Description | Published |
|---|
| 20100145548 | FAN DRIVING CIRCUIT - A fan driving circuit includes a temperature sensor, a super input and output (SIO) chip, an integrator, a feedback circuit, and a control circuit. The temperature sensor is configured for measuring a temperature of a computer component and outputting a temperature signal according to the measured temperature. The SIO chip is configured for converting the temperature signal into a digital pulse width modulation (PWM) signal. The integrator is configured for converting the PWM signal into an analog signal. The feedback circuit is configured for processing a driving voltage powering a fan to dissipate heat from the computer component and outputting a feedback signal for to compare with the analog signal. The control circuit is configured for comparing the feedback signal with the analog signal and outputting a new driving voltage to control the speed of the fan. | 06-10-2010 |
| 20110063220 | INPUT DEVICE - An input device comprises a substrate, a mouse unit and a keyboard unit, wherein the switch unit is provided on a lateral side of the substrate, which activates the input device as the mouse unit or the keyboard unit. A cover is pivotally provided between the keyboard unit and the mouse unit, and when the input device is activated as a mouse unit, the cover can be closed for ease of handling. When the input device is activated as the keyboard, the cover can be opened for input. The keyboard unit comprises a right row selection key and several row selection keys to input different key values on a main key. | 03-17-2011 |
| 20110084632 | CIRCUIT FOR CONTROLLING ROTATION SPEED OF COMPUTER FAN - A circuit for controlling a rotation speed of a computer fan includes a control chip, a conversion circuit, a fan header, a first switch, and a second switch. When a first terminal of the first switch is connected to a second terminal of the first switch, and a first terminal of the second switch is connected to a second terminal of the second switch, the conversion circuit converts a control signal received from the control chip to a voltage signal, and outputs the voltage signal to a power pin of the fan header. When the first terminal of the first switch is connected to a third terminal of the first switch, and the first terminal of the second switch is connected to a third terminal of the second switch, a control pin of the fan header receives the control signal, the power pin receives power from a first power supply. | 04-14-2011 |
| 20110178781 | METHOD FOR BUILDING MAGNETIC BEAD MATHEMATICAL MODEL - A method for building a magnetic bead mathematical model includes defining component elements of the model of the magnetic bead, building the model of the magnetic bead, obtaining a characteristic curve of an impedance of a magnetic bead in a standard magnetic bead specification of the magnetic bead, ascertaining parameters of the component elements, simulating the model of the magnetic bead, and comparing the characteristic curve with the characteristic curve in the standard magnetic bead specification, to further optimize the mode of the magnetic bead. | 07-21-2011 |
| 20110193653 | PRINTED CIRCUIT BOARD - A low pass filter circuit includes an inductor and a capacitor. A first terminal of the inductor functions as an input to receive direct current voltage, and a second terminal of the inductor is connected to a first terminal of the capacitor through first and second conductor traces connected in series. A second terminal of the capacitor is grounded. Widths of the first and second conductor traces both range from about 2 mils to about 5 mils. A node between the first and second conductor traces outputs the direct current. | 08-11-2011 |
| 20110210803 | DIFFERENTIAL CIRCUIT AND LAYOUT METHOD FOR THE SAME - A differential circuit includes a chip with two terminals in two directions, a first differential signal trace, and a second differential signal trace. The first differential signal trace includes a first parallel section and a first unparallel section connecting the first parallel section to a terminal of the chip. The second differential signal trace includes a second parallel section parallel to the first parallel section, a second unparallel section connecting to the second parallel section, and an equalizing section connecting second unparallel section to the another terminal of the chip. The second parallel section is equal to the first parallel section. The total length of the second unparallel section and the equalizing section is equal to the length of the first unparallel section. | 09-01-2011 |
| 20110241717 | CONNECTING DEVICE - A connecting device for connecting pins of a DIP chip to a test device comprises two each of half frames, columns of testing pins, connecting screws, fixing screws, and four holding plates. The two columns of testing pins are arranged respectively on the two half frames parallel to the lengthways direction of the half frame. The distance between two adjacent testing pins in the same column is equal to that between the two adjacent pins in the same column of the DIP chip. The two connecting screws screw into the half frames perpendicular to the lengthways direction of the half frame. Two of the holding plates extend down from each of the half frames and are aligned with short sides of the corresponding half frame. The fixing screws fix the two holding plates on the same half frame along a direction parallel to the lengthways direction of the half frame. | 10-06-2011 |
| 20110279288 | KEYBOARD - A keyboard includes a keyboard main body and a supporting apparatus. A first extending portion is extended from a sidewall of the keyboard main body. A number of keys are set on a top of the keyboard main body. A second extending portion is extended from a sidewall of the supporting apparatus and mounted to the first extending portion. A supporting device is set on a top of the supporting apparatus, opposite to the second extending portion. | 11-17-2011 |
| 20110279960 | COMPUTER - A computer includes a display assembly, a base, a stand, and a keyboard. The base includes a supporting board and an engaging board. The stand is located on the base supporting the display assembly. The keyboard includes a main body and an extension board extending from the main body. The main body has a key area. The extension board is fixed to the engaging board to help stabilize the display assembly. | 11-17-2011 |
