Static Circuit Board Effect Leakage resistance is the dominant static circuit board effect. Contamination of the PCB surface by flux residues, deposited salts, and other debris can create leakage paths between circuit nodes. Even on well-cleaned boards, it is not unusual to find 10 nA or more of leakage to nearby nodes from 15-volt supply…
Differential Signal-Handling Technique in PCB Card Design In general terms, transmitting a signal from one point on a PCB to another for measurement or further processing can be optimized by two key interrelated techniques. These are the use of high impedance, Differential Signal-Handling Technique in PCB Card Design. The high impedance loading of an in-amp…
Ground Isolation Amplifer in PCB Board Design Full signal transmission accuracy can still be accomplished in the face of such high noise voltages, by employing a principle discussed earlier. This is the use of a differential-input, ground isolation amplifier. The Ground Isolation Amplifer in PCB Board Design minimizes the effect of ground error voltages between…
Design PCB Ground Isolation Techniques While the use of ground planes does lower impedance and helps greatly in lowering ground noise, there may still be situations where a prohibitive level of noise exists. In such cases, the use of ground error minimization and isolation techniques can be helpful, as a result of that, engineer need…
Ground Path of PCB Board Design A more realistic model of a ground system is shown in Below Figure. The signal return current flows in the complex impedance existing between points G1 & G2 of Ground Path of PCB Board Design as shown, giving rise to a voltage drop ÄV in this path. But it is…
High Density PCB Board Designing High density PCB Board designing is increasingly challenged by several factors: physical, finer pitch pin spacing, in-surfficient financial support, mounting must be very precise, and the environment limitation. Many plastic packages absorb moisture, causing the crack on assembly processing. Physical factors also include the complexity of the installation process and…
High Density Printed Circuit Board Design Global Trend Most people think the BALL GRID ARRAY package with mass chip scale as a feasible solution for portable electronic product to break the space limitation for High Density Printed Circuit Board Design. And it will simultaneously satisfy both the requirement for more complicate functions and performance. However…
Design Hybrid Tuner PCB Board Infineon MOPLL Tuning chip TUA6039-2 OR TUA6037 can realize the super low cost hybrid tuner PCB board design, this kind of chip ULC tuner will integrate radio frequency and IF circuit which is working in 5V or 3.3V, power consumption will decrease 34%. Design single layer PCB Board can further…
Fujitsu Converter PCB Board Repair If the Fujitsu Converter PCB Board has failed due to switching power supply is damaged, An obvious feature to show that Switching power supply damage is there is no display on the screen when power converter on, Fuji G5S uses a two-stage switching power supply, it first intermediate DC circuit…
For the engineer who use converter, Fuji should be an well-known brand, with its simple and practical operation, high cost effective features which has occupied half of China’s converter market, with the passage of time, As a widely used market, converter has entered a high incidence of failure, how to find the root cause of…