摘要:
A system and method for inspecting layout of a printed circuit board (PCB) provides a graphical user interface (GUI). The GUI displays a layout of the PCB. High side pins of a pulse width modulation (PWM) controller and a component connected to a high side pin are found. If the component is a metallic oxide semiconductor field effect transistor (MOSFET), the system calculate absolute a linear distance and a trace distance between a source pin of the MOSFET and a capacitor pin of a coupling capacitor connected to the source pin. If the linear distance, the trace distance and a capacitance of the coupling capacitor accord with a layout standard, the layout of the PCB is determined to be up to standard.
摘要:
A system and method for checking a ground via of control chips of a printed circuit board (PCB) provides a graphical user interface (GUI) displaying a layout of the PCB. The control chip has a plurality of ground pins. The computer searches for signal path routing of each ground pin and ground vias along each signal path routing of each ground pin. If there are any ground vias having the same absolute coordinates, the computer determines that the ground vias are shared by more than one ground pin.
摘要:
A system for measuring a signal waveform is provided. The system comprises a parameter receiving module, a waveform receiving module, a waveform filter, and a data storing module. The parameter receiving module is configured for receiving one or more filtration conditions. The waveform receiving module is configured for receiving the signal waveform. The waveform filter is configured for filtering the signal waveform to obtain a desired waveform. The data storing module is configured for storing the desired waveform into a storage device.
摘要:
A system and method that can analyze a temperature rise of a printed circuit board (PCB). The system and method receives attribute parameters of the PCB from an input device, and generates a temperature rise formula according to the received attribute parameters. Additionally, the system and method calculates a temperature rise of a local area surrounding each component on the PCB according to the temperature rise formula.
摘要:
A system and method for testing objects using a mechanical arm includes establishing coordinate system based on a work area of the mechanical arm, and obtaining test parameters from a storage system. The method further includes controlling the mechanical arm to get an object and position the object to the position of a test platform according to the test parameters, controlling the mechanical arm to get test tool from a tool shelf and position the test tool to a position of test point on the object to test the object according to the test parameters. The method also includes controlling the mechanical arm to get the object from the test platform and position the object to the location reserved for the object according to the test parameters.
摘要:
Parameters of a radio frequency filter can be changed by changing structure of each component of the filter. Material of each component, diameters of each of magnetic cylinders, density of each of conductive coils, and thickness of each of dielectric layers can be changed. When any component needs to be replaced, the filter can be detached as needed.
摘要:
A method for testing a characteristic impedance of an electronic component includes sending a positioning command to a control computer through a switch, so as to drive a probe holder of a mechanical arm to position probes of a time domain reflectometer (TDR) on a position of the electronic component. The method further receives measured data collected by the TDR, and compares the measured data with preset standard values to determine if the measured data is acceptable.
摘要:
A printed circuit board (PCB) includes two layers, two signal transmission traces, and a vertical interconnect access (via). The signal transmission traces are respectively arranged on the layers. The signal transmission traces are electrically connected to each other through the via. A centerline of the via with a vertical line of the layers form an acute angle θ, the angle θ is less than cos−1[(Lv2−Lt2)/(Lv2+Lt2)]. Wherein Lt is loss of the two signal transmitting traces in a unit length, and Lv is loss of the via in a unit length.
摘要:
A clamping mechanism for holding a workpiece includes an end executor, a driving member, and a contact member detachably mounted on the end executor. The end executor includes a plurality of claws arranged in matrix. The contact member includes a mounting board and a plurality of contact sleeves corresponding to the claws. The driving member is capable of driving the mounting board, moving the contact sleeves to extend the claws, and hold the workpiece.
摘要:
A computer motherboard includes a printed circuit board which includes a central processing unit (CPU) socket and a group of memory slots. The group of memory slots includes an in-line type memory slot and a surface mounted device (SMD) type memory slot. The in-line type memory slot includes a number of plated through holes. The SMD type memory slot is set between the in-line type memory slot and the CPU socket. The through holes of the in-line type memory slot are connected to the CPU socket through traces, pads of the SMD type memory slot are connected to corresponding through holes of the in-line type memory slot having the same pin definition.