Seektronics

TSMC rare increase in the full process foundry price 10 ~ 20%, the market is expected to IC design and even downstream terminal brand industry will face foundry up costs difficult to pass on, but the foundry offer although strong quarterly up does not affect many IC design industry price increase plan.   The IC design industry revealed that this wave has the strength to "fully pass on" the industry, including MediaTek, REALTEK, Novatek, ASMedia, ASPEED, etc. have been determined in the fourth quarter, the first quarter of 2022 will start to increase prices, in addition to STMicroelectronics, Xilinx, Molex, ON Semiconductor, TI, Broadcom and Intel have also been increasing chip prices.   01 STMicroelectronics raises for the third time   On 27 September, STMicroelectronics issued another notice stating that the current shortage in the semiconductor supply chain continues to severely affect our industry, with no short-term signs of recovery.   With some key supplies in the suppl

01    Common errors in schematics   (1)   The ERC reporting pin has no access signal:   •   I/O attributes defined for the pins when the package is created ； •   Inconsistent grid attributes were modified when creating components or placing them, and the pins were not connected to the wires; •   The pin direction is reversed when creating the component and must be connected at the non-pin name end; •   The most common reason for this is the failure to create a project file, which is the most common mistake made by beginners . Components run outside the drawing boundary: components are not created in the center of the component library chart paper.   (2)  The network table of the created project file can only be partially transferred to the PCB : the netlist was not selected as global when it was generated.   Never use annotate when using a multi-part component that you have created yourself.   02    Common errors in PCBs   (1)  NODE not found reported on network load   • The componen

We all know that capacitor  voltages cannot change abruptly and inductor  currents cannot change abruptly, what is the theoretical basis for this?   Take an example of an RC first-order low-pass filter.   Vin charges capacitor C1 through the R1 resistor, the potential of Vin is added to the two metal pole plates of capacitor C. The positive and negative charges are gathered towards the two-pole plates of the capacitor respectively under the effect of the potential difference and an electric field is formed, which is the charging process of the capacitor. Charging of capacitors   The charge number, which measures the charge of a capacitor, is Q，Q = CV and C is a constant, so the charge number is proportional to the voltage.   C = Q/V, the capacity represents the ability of the capacitor to store charge and the differential expression is： Current is the amount of change in the number of charges per unit of time： Combining the two equations (1) and (2) yields： It follows from the formula