What are the two characteristics of the network power controller?
- It is easier to realize the network function of the power supply, and at the same time reduce the cost.
- The production and debugging process of the product are greatly simplified, and parameters such as output voltage and protection point can be directly set by the software. There is no need for personnel debugging, which is more in line with the rhythm of modern large-scale production.
Does the ARM processor use the pipeline?
ARM processors use pipelining to increase the speed of the processor’s instruction flow.
This enables several simultaneous operations and smoother, continuous operations between the processing and memory systems, providing an instruction execution speed of 0.9 MIPS/MHz.
What is the status output of the LTCl733?
Status outputs of the LTCl733 include:
C/10 charging detection to indicate the state of late charging;
AC power adapter status detection to determine whether charging can continue;
Charge current detection and detection to identify battery performance.
What is a symmetric cryptosystem?
Symmetric cryptosystems are also known as single-key cryptosystems, symmetric-key cryptosystems, and secret-key cryptosystems.
What is the group low power function?
When the A/D converter is not used, the ladder resistor of the A/D converter and the reference voltage input pin (vREF) are disconnected through the VCUT bit of the ADCON1 register. Current does not flow from the VREF pin to the resistor ladder, reducing power dissipation.
When using the A/D converter, first set the VCUT bit to “1” (Vref connection). Then set the ADST bit of the ADCON0 register to “1” (start A/D’ conversion). ADST bit and VCUT bit cannot be written with “1” at the same time. In addition, during the A/D conversion process, the VCUT bit cannot be cleared to “0” (Vref is not connected). It should be noted that this function does not affect the Vref of the D/A converter because they are independent.
What is a photocell?
Photovoltaic cells are devices that use the photovoltaic effect to directly convert light into electrical energy.
What is the spectral response?
The relationship between the relative sensitivity of the photoresistor and the incident wavelength is called the spectral characteristic, also known as the spectral response.
The output noise of the photomultiplier tube limits its detection of weak light. What are the main types of noise?
- Shot noise: This kind of noise comes from the random fluctuation of the photoelectron emission and multiplication process, which is usually called “signal internal noise”.
- Dark current noise: Dark current refers to the current output when the PMT is placed in a completely dark environment and the operating voltage is applied. The thermionic emission of the cathode is the main factor for the generation of dark current, followed by the thermionic emission of the first dynode, anode leakage current, field emission and so on. Dark current noise is closely related to temperature, so using a cooling jacket to cool the cathode or adding a magnetic field at the cathode end to filter out hot electrons can reduce dark current noise.
- Ion noise: ions or feedback ions in the PMT are incident on the photocathode, and photoelectrons are also excited. In addition, cosmic rays can also cause photoelectron emission from the photocathode, which can also cause noise.
What are the salient features of the RFID identification technology supply chain data management method?
An explicit modification to the EPCglobal standard enables the method to utilize ontology-based data. And support non-standard inference services while maintaining backward compatibility. Use advanced compression techniques to save space and maintain a logical representation of data aggregation.
In general, UWB technology has many benefits due to its ultra-wideband characteristics. What are included?
- Coexistence with current narrowband and wideband radio services;
- Large channel capacity to support real-time HD video streaming;
- Ability to operate with low signal-to-noise ratio, providing high performance in noisy environments;
- High performance in multipath channels. Under unfavorable conditions, transmit higher signal strength;
- Simple transceiver architecture, more ultra-low power consumption. Smaller form factors have better time-to-failure intervals. Lower costs can also be achieved.
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