Abstract:
A method for testing a digital to analog converter, which operates in an undersampling environment, wherein signals of a tested DAC and a signal generator are modulated by a PWM device and then processed by a digital processing circuit to generate a digital signal, whereby is formed a low-speed equivalent ADC. The signal generator is provided by uniform-distribution random test patterns, and the signal generator generates an uniform-distribution random analog signal to the equivalent ADC. Thereby, the test error caused by the non-ideality of the signal generator is corrected, and the tested circuit can work in a full speed.
Abstract:
A method for testing a digital to analog converter, which operates in an undersampling environment, wherein signals of a tested DAC and a signal generator are modulated by a PWM device and then processed by a digital processing circuit to generate a digital signal, whereby is formed a low-speed equivalent ADC. The signal generator is provided by uniform-distribution random test patterns, and the signal generator generates an uniform-distribution random analog signal to the equivalent ADC. Thereby, the test error caused by the non-ideality of the signal generator is corrected, and the tested circuit can work in a full speed.
Abstract:
The present invention discloses a conveying and stacking device for corrugated boards, which is used in a conveyor of a corrugated board production line to stack corrugated boards by a specified number and comprises an exhaust facing the downstream of the conveyor and a sucker arranged at the upstream of the exhaust and facing the procession of the corrugated boards. The sucker and the exhaust are arranged in an elevator for elevating the corrugated boards and respectively suck air and exhaust air simultaneously.
Abstract:
A key module and its manufacturing method are provided in the present invention. The steps of the method include: providing a mold; forming a key body having multiple opening portions on the mold; jostling a combination of a display body and an elastic body to the key body; and finally, tightly attaching the display body to the key body and stuffing the display body into the opening portions of the key body. Therein, the elastic body has a lower end formed with a contact block contacting a circuit board. By compressing, injecting or infusing a silicone rubber material or an elastic material into the opening portions, the gap located between the key body and the display body or between the key body and the elastic body is smaller than 0.01 mm. Thus, the appearance of the key module of the present invention is almost seamless.
Abstract:
A key module and its manufacturing method are provided in the present invention. The steps of the method include: providing a mold; forming a key body having multiple opening portions on the mold; jostling a combination of a display body and an elastic body to the key body; and finally, tightly attaching the display body to the key body and stuffing the display body into the opening portions of the key body. Therein, the elastic body has a lower end formed with a contact block contacting a circuit board. By compressing, injecting or infusing a silicone rubber material or an elastic material into the opening portions, the gap located between the key body and the display body or between the key body and the elastic body is smaller than 0.01 mm. Thus, the appearance of the key module of the present invention is almost seamless.
Abstract:
A fabric structure is constructed having a fabric base sheet, a viscidity layer, a polymeric back layer, and a protective layer. The polymeric back layer is prepared from SBC (styrenic block copolymer) for the advantage of low specific gravity and preventing the drawback of PVC or the like that pollutes the environment when disposed off. The protective layer is prepared from PU series or modified SBC (styrenic block copolymer) series agent. When the fabric structure used to make a bag, the front surface of the fabric base sheet is disposed outside the bag and the surface of the protective layer is disposed inside the bag.
Abstract:
Disclosed herein are rouging methods and devices for a flip-chip package. The flip chip includes several outer pads and several inner pads. The routing method includes: setting an outer sequence based on the arrangement order of the outer pads; setting several inner sequences based on the connection relationships between inner pads and the outer pads; calculating the longest common subsequence of each inner sequence and the outer sequence, defining the connection relationships between the inner pads and the outer pads corresponding to the longest common subsequence as direct connections, and defining the connection relationships between the inner pads and the outer pads that do not correspond to the longest common subsequence as detour connections; establishing the routing scheme of the flip chip based on the connection relationships between the inner pads and the outer pads.
Abstract:
The present invention discloses a multi-level output signal converter, which is connected to an audio amplifier. The audio amplifier comprises a comparing/measuring device, an encoder and an output unit. The multi-level output signal converter comprises a timing processing unit and a multi-level converter. The timing processing unit is connected to the comparing/measuring device and the encoder. The timing processing unit includes a plurality of flip-flops and a timing summing element. The flip-flop receives a first signal from the comparing/measuring device and outputs the first signal to the timing summing element. The encoder converts the first signal into a second signal. The multi-level converter is connected to the encoder and the output unit. The encoder transmits the second signal to the multi-level converter, and the multi-level converter thus outputs a third signal to the output unit.
Abstract:
A novel method applies the down-conversion sampling technology to test a high-speed digital-to-analog conversion. In the method, a digital-to-analog conversion output signal of a high-speed digital-to-analog converter and a low-frequency sinusoidal carrier wave signal input to a comparator to obtain a low-speed pulse signal. Therefore, the variation of the pulse width of the low-speed pulse signal can be measured by a common logic analyzer to assess the nonlinearity error of the high-speed digital-to-analog converter.
Abstract:
A method for capturing and organizing intelligence data using an organic data model includes: receiving one or more webpages containing social intelligence data; segmenting content of the one or more webpages containing social intelligence data; identifying named entities in the segmented content of the one or more webpages; identifying topics in the segmented content of the one or more webpages; identifying opinions in the segmented content of the one or more webpages; integrating the identified named entities, topics, and opinions to construct an organic object data model; and storing organic object data associated with the constructed organic object data model in an organic object database.