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  • Ten Daily Electronic Common Sense-Section 61

    What power management is required in the design process to ensure that the design’s power consumption is within the predetermined range and reliable?

    1. Dynamic power: For the power required during circuit switching or operation (from 1 to 0, or from 0 to 1), it must be controlled in the power system design.
    2. Static power: The power consumed by each component when the circuit is static or unchanged must also be controlled in the power system design.
    3. Maximum power: In the power system design, it is necessary to control the time when the maximum load occurs, and to understand the characteristics of the maximum load.

    What are the characteristics of the body CAN network?

    1. The transmission medium adopts twisted pair.
    2. The data transmission rate is 62.5 Kbps.
    3. The time interval for each network node to send information is 20 ms.
    4. The priority order is:
      • a. Central control unit;
      • b. Driver’s side front door control unit;
      • c. Passenger’s side front door control unit;
      • d. Driver’s side rear door control unit;
      • e. Passenger side rear door control unit.

    What are the Peli CAN modes?

    • Peli CAN address list
    • Peli CAN reset mode setting
    • Mode register
    • Command register
    • Status register
    • Interrupt register
    • Interrupt enable register
    • Arbitration lost capture register
    • Error code capture register
    • Error Alarm Limit Register
    • Tk Error Count Register
    • Transmit Buffer
    • Receive Buffer
    • Acceptance Filter
    • Rx Information Counter
    • Rx Buffer Start Address Register

    What is the basic principle of face recognition technology?

    The position, size, J, and position information of the main facial organs of each face are analyzed, and the facial features are further extracted based on the obtained information. It is compared and matched with the facial features stored in the database to identify the identity corresponding to each face. A complete set of face recognition process mainly includes face image acquisition, face positioning, face recognition preprocessing, identity search and identity confirmation, etc. The whole process is usually completed in the face recognition system.

    What is the principle of parameter testing for COS functional testing?

    Under the condition that the measured command parameters P1, P2, Lc and the data domain are correct and unchanged, the exhaustive method is used to traverse each wrong CLA as the input parameter. Test whether the COS can correctly respond to the error code, and the same is true for other parameter tests.

    What is a hub?

    A hub is a central network device that connects network nodes (such as workstations, servers, etc.) in a star topology. Through the RJ-45 socket on it, it can be connected with a twisted pair with a crystal head. It can be connected to a thin coaxial cable with a T-shaped head through the BNC socket on it. The hub provides a central network connection through a logical Ethernet bus network or a token ring network, and physically forms a star or cascaded star (ie, tree) network structure.

    What are the methods of PLC programming?

    There are many methods for PLC programming, and the commonly used methods are empirical method, conversion method, logic method and step sequence control method.

    What are the protection features of UCC28600?

    1. Overheating protection: The chip overheating protection point is set at 140 degrees Celsius, when the temperature drops by l5. C resumes normal work.
    2. Cycle-by-cycle power limit: At the end of each cycle, the CS terminal voltage exceeds 0.8V, that is, the over-power limit point is reached.
    3. Current limit: When the primary current exceeds the maximum current level, the CS terminal is l. At 25V, the device is turned off again and retried.
    4. Overvoltage protection: The overvoltage protection of the line and load is adjusted by the transformer turns ratio ovPl and 0vP2. There is a voltage source at the 0VP end, and only the energy output current cannot leak in. Line overvoltage protection occurs, and 0VP is clamped at 0V at this time; when the bias winding becomes negative, OUT=H1 or resonance. The 0V voltage source clamps OVP to 0V, sourcing current from the 0VP terminal, which mirrors the line 0VP comparator and QR detection circuit. If the 0VP voltage is greater than 3.75V, the line OVP comparator starts the shutdown procedure and is turned off.
    5. Under-voltage lockout: This protection is used to deal with unsuitable bias conditions, under-voltage lockout monitors %D and prevents it from working under the UVL0 threshold.

    What is a continuum model?

    The continuum model mainly characterizes the device state according to the macroscopic phenomena in the system (such as carrier diffusion, drift, etc.), and does not necessarily involve the microscopic motion behavior of each particle in the system.
    The methods used in this type of model are similar to the methods used to solve the current and voltage characteristics of pn junctions and transistors under the classical semiconductor physics system. Generally, the resistance-change process of the resistive memory device is described by the simultaneous carrier continuity equation, the Poisson equation, etc., to obtain the change of the electrical characteristics of the device.
    The theoretical framework of the continuum physical model is simple and clear, and the effects of macroscopic parameters such as carrier mobility and temperature on the device performance can be directly reflected through simulation and comparison. There have been many reports on the research of resistive devices based on the continuum model framework at home and abroad. Among them, Yu Zhiping’s group, Ielmini’s group, etc. work represented.

    What types of SX1231 transceiver related registers can be divided into?

    SX1231 transceiver related registers can be divided into 8 categories:

    1. Address register
    2. General purpose registers
    3. Floating point registers
    4. Constant register
    5. Vector register
    6. Special Purpose Registers
    7. Instruction register
    8. Index Register


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