Ten Daily Electronic Common Sense-Section 2

What is the TA disconnection criterion for line protection?

• The difference between the self-produced zero-sequence current and the external zero-sequence current is greater than a certain value, and the TA abnormal signal is delayed.
• There is no zero-sequence voltage of the self-produced zero-sequence current, and the TA abnormal signal is delayed.

What is the detection procedure for the Ford sedan capacitive intake pressure sensor?

• Use a multimeter to measure the power supply voltage.When the ignition switch is turned on, the voltage between the power line c terminal and the grounding A terminal should be 5V, which indicates that the ECU is powered normally.
• Use a multimeter to measure the signal voltage.

What services does the Avalon bus module provide for Avalon peripherals connected to the bus?

1. Data channel multiplexing
2. Address decoding
3. Waiting state (Wait-State)
4. Dynamic bus width
5. Interrupt-Priority allocation
6. Latent Transfer Capability
7. Streaming Read and Write Capability

What are the auxiliary design tools integrated in Altera’s development tool Quartus II?

Some of the auxiliary design tools integrated in Altera’s development tool Quartus II.

What are the variables that the logical operators apply to?

The variables to which the logical operators apply are stdjogic, bit, std_logic_vector types.

What are the design principles of digital control systems?

The goal of building a digital control system is to shorten the control system development cycle, reduce costs, and increase system reliability.How to distribute hardware functions according to software and hardware resources in the digital control system is an important part of the digital control system.

Therefore, when constructing the digital control platform, it is necessary to follow a basic design principle, that is, the hardware resources of the platform and the application field cooperation must be limited. The hardware resources of the control platform should meet the typical digital control system, and have better performance scalability.

The design of the digital control system includes hardware design and software design.The hardware design principle of the digital control system is to determine the specific implementation form of the digital hardware circuit on the basis of considering the versatility and scalability of the digital control platform, clarify the required hardware resources, and make a clear division of the tasks undertaken by the hardware.

How to generate temperature error?

Generally, the resistivity, mobility, and carrier concentration of semiconductor materials vary with temperature.The Hall element is made of a semiconductor material, so its performance parameters such as input and output resistance, Hall constant, etc. also vary with temperature, causing the Hall potential to change, causing a temperature error.

What are the advantages and disadvantages of thermistors?

The main advantages of the thermistor are large temperature coefficient of resistance, high sensitivity, small heat capacity, fast response, and resolution up to 10 ? 4 ° C; but the main disadvantages are poor interchangeability and non-linearity of thermoelectric characteristics, which is to expand the measurement.The range and key issues that must be addressed to improve measurement accuracy.

What is the adjustment method for the emission wavelength of polymer OLED devices?

1. Group adjustment.A certain substituent is introduced into the conjugated chain of the polymer. When the substituent affects the degree of conjugation of the main chain due to its spatial or electronic action, the forbidden band of the polymer changes.
2. Conjugate chain length adjustment.Doping adjustment is to incorporate organic small molecules with different luminescent colors into the polymer, so that the polymer luminescent layer contains a plurality of emission centers, and the illuminating wavelength of the device can be conveniently adjusted by voltage.This is a very simple and effective way to adjust the wavelength of the light.
3. Blending adjustment.

How should China’s OLED enterprises respond to the patent gap?

Strengthen the development of organic light-emitting materials.Avoiding intellectual property risks in product development or introduction.