Issues to be paid attention to when calculating parameters of analog electronic circuits

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Issues to be paid attention to when calculating parameters of analog electronic circuits [Copy link]

In the process of circuit design, some parameters must be calculated before selecting components, such as resistance, capacitance, oscillation frequency in oscillation circuit; amplification factor, bandwidth, conversion rate of amplifier circuit; output voltage, output current and other parameters of regulated power supply. Only by deeply understanding the working principle of the circuit and correctly using calculation formulas and calculation charts can satisfactory calculation results be obtained. When designing and calculating, it is often the case that the parameter values that meet the requirements in theory are not unique. Designers should choose according to specific conditions such as price, volume and source of goods.

When calculating circuit parameters, the following issues should be paid attention to;

1. The working current, voltage and power consumption of each component should meet the requirements, and appropriate margin should be left.

2. Sufficient margin must be left for the limit parameters of components, which should generally be greater than 1.5 times the rated value.

3. The working conditions such as ambient temperature and AC grid voltage should be considered according to the most unfavorable situation.

4. The parameters of resistance and capacitance should be selected as nominal values near the calculated values.

5. Under the premise of ensuring that the circuit meets the functional index requirements, the variety, price, volume, etc. of components should be reduced .