Ten Daily Electronic Common Sense-Section 46

What are the main technical indicators of A/D conversion?

1. Conversion time and conversion rate: Conversion time is the time required for the A/D to complete a conversion. The inverse of the conversion time is the conversion rate.
2. Resolution: The resolution of the A/D converter is customarily represented by the number of bits of output binary or BCD bits. The error caused by the quantization process is called quantization error. Quantization error is the error caused by the quantization of analog quantities by finite numbers. The quantization error is theoretically specified as the LSB (Least Significant Bit) of a unit resolution. Increasing the resolution can reduce the quantization error.
3. Conversion accuracy: The conversion accuracy of an A/D converter is defined as the difference between an actual A/D converter and an ideal A/D converter on the quantized value. It can be expressed as absolute error or relative error.

What is a write gateway session and routing?

Although the network manager controls the entire WirelessHART network, the network manager needs to go through a gateway to perform its duties. The new device has the session with the gateway, the routing path to the gateway, and the graph information, which means that the device is fully joined to the network.

Briefly describe the FIQ interrupt?

F10 has the highest priority and the fastest interrupt response, and is often used to handle the most important and urgent interrupt events in the system.
Once the FIQ interrupt occurs, the ARM processor enters FIQ mode. The PC points to the FIQ exception entry 0xlC, and starts to process the FIQ interrupt. The ARM processor has designed five private registers of R8 to Rl2 for the FIQ mode to speed up the processing of the FIQ.
The purpose of designing the FIQ mode is to obtain the fastest interrupt processing speed and reduce the interrupt delay.

What are the outstanding features of piezoelectric sensors?

The outstanding feature of piezoelectric sensors is that they have good high-frequency response characteristics. It is widely used in acceleration, vibration and shock measurement in detection technology.

What are the characteristics of LD0?

The characteristics of LD0 are: low output noise voltage, small influence of power supply voltage changes on it, fast response to load changes, and small quiescent current.

What is a photoResistors?

A photoresistor, also known as a light pipe, is a homogeneous semiconductor optoelectronic device.

The improvement to the waiting phase is mainly because the process no longer uses the DD (direct delivery) routing algorithm. Why?

The improvement to the waiting phase is that the process no longer uses the DD (direct delivery) routing algorithm, but is replaced by a more efficient method. Because the mode in the wait phase is not flexible enough, if it encounters a node that can better deliver the message, the carrier should forward the message, which not only increases the chance of successful transmission, but also frees up node cache space and improves resource utilization.

What are the advantages of integrated smart sensors?

Integrated smart sensors have the advantages of small size, low cost, low power consumption, high speed, high reliability, high precision and strong functions.

What types of PLC output circuits are usually divided into?

Relay output, transistor output and thyristor output.

What are the main factors affecting the liquid potential?

The main factors affecting the junction potential are pH, ionic strength, temperature, electrolyte diffusion, agitation, etc.