Abstract in Chinese: A highly reliable power management circuit of digital signal processor (DSP) TMS320F28335 is designed. The power supply demands of the DSP were analyzed, and the required power was accounted. The 1.9 V and 3.3 V dual power supply management circuit meeting demands of power and power-on timing of the chip was designed. … Read more
Source: ICisC Nanjing Integrated Circuit Industry Service Center 1. Choosing Pull-up Resistors for Microcontrollers As can be seen in the reset circuit, when resistor R1=10k, RST is high, but when R1=50, RST is low. It is clear that R1=10k is incorrect, as the microcontroller remains in the reset state and cannot function at all. The … Read more
RS485 communication is a commonly used communication method in the industry, widely applied with a simple circuit. Below is a circuit diagram of the 485 interface: This image is one I found online; it is a commonly used circuit. Although many people use it this way and I haven’t heard of any issues, I believe … Read more
1. Signal Crosstalk Crosstalk refers to the coupling phenomenon between two signal lines. Due to the close spatial distance, there will be unwanted inductive and capacitive coupling between the signal lines, leading to mutual interference. Capacitive coupling can cause coupling currents, while inductive coupling can cause coupling voltages. This is a tricky issue in circuit … Read more
This design guide discusses how to design RS-485 interface circuits. The necessity of balanced transmission line standards is discussed, along with an example of process control design. The article also discusses line load, signal attenuation, fault protection, and current isolation under various headings. 1. Why Balanced Transmission Line Standards Are Necessary The focus of this … Read more
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Someone just asked me how to display circuit nodes in Multisim 12. After I told him, I suspected many forum friends might not know either, so I’m leaving this post for the convenience of everyone: Select netnames show all Now, if you check the circuit again, the circuit nodes will be displayed.
Multisim is a simulation tool developed by National Instruments (NI) based on Windows, suitable for the design of board-level analog/digital circuit boards. It includes graphical input for circuit schematics and circuit hardware description language input methods, with rich simulation and analysis capabilities. Engineers can use Multisim to interactively build circuit schematics and simulate circuits. 01 … Read more
The application of push-pull circuits is very extensive, such as the push-pull mode output of microcontrollers, PWM controllers output, bridge driver circuits, etc. The English term for push-pull is: Push-Pull, which literally means push-pull. Therefore, push-pull circuits are also called push-pull type circuits. The essence of push-pull circuits is power amplification, which enhances the driving … Read more
7-segment displays are inexpensive and easy to drive, capable of showing numbers 0-9, characters A, b, C, d, E, F, P, q, L, etc. They are widely used in electronic products for simple data display. For example, in temperature controllers for temperature and setting parameter display, electronic clocks for time display, and elevators for floor … Read more