Questions tagged [quality]

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Q factor of higher order circuit

I am trying to understand the concept of Q factor for higher order circuit. Consider the circuit as shown in the figure I calculated Zin using Matlab and the transfer function looks as follows: $$Zin(...
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2answers
60 views

If a PCB is inspected to an IPC-A-600 class higher than specified what are the negative impacts?

I have received several parts from a PCB manufacturer which should have been inspected to IPC-A-600 Class 2 but were instead inspected to IPC-A-600 Class 3. I believe I have received PCBs inspected to ...
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1answer
47 views

Measuring experimentally the poles parameters

I have the following Sallen & Key lowpass filter: $$T(s)=\frac{\frac{1}{R_1R_2C_1C_2}}{s^2+(\frac{1}{C_1R_1}+\frac{1}{C_1R_2})s+\frac{1}{R_1R_2C_1C_2}}$$ The parameters values are $$R_1=10 k\Omega$...
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3answers
206 views

Designing a filter: does the order i which we cascade the sections matter?

So I am designing a 4th order lowpass filter using two biquadratic sections. I decided to split the gain evenly between both sections. After some calculations, one of the sections has a quality factor ...
9
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1answer
629 views

What to check for when buying an electronic component or module?

This has been raised as a canonical Q and A for future reference How can I acquire electronic parts/items/modules and ensure that there is minimal risk of them being unsuitable for my project or ...
4
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3answers
127 views

Is it reasonable to qualify a component by testing only?

Just got assigned (sole) responsibility of a major product group in my company. I have discovered that we regularly use components outside of their specifications, and justify that by testing the ...