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How do you choose the value of a bypass capacitor?
Bypass capacitors are usually sized by convention or typical values. For example, common values are 1µF and 0.1µF. In the simplest terms, the larger value handles the lower frequencies and high current issues while the smaller value handles higher frequencies.
Can a bypass capacitor be too large?
YOU CAN HAVE TOO MUCH CAPACITANCE. However, it all depends on the type of power supply.
How big should a decoupling capacitor be?
The low-frequency noise decoupling capacitor value should lie between 1 µF to 100 µF. The high-frequency noise decoupling capacitor should lie between 0.01 µF to 0.1 µF.
What is the length of a 100 MHz transmission line?
When dealing with radio-frequency systems, though, transmission line length is far from trivial. Consider a 100 MHz radio signal: its wavelength is a mere 9.8202 feet, even at the full propagation velocity of light (186,000 mile/s).
How to minimize the impact of transmission line length?
The most effective way to minimize the impact of transmission line length on circuit behavior is to match the line’s characteristic impedance to the load impedance.
What happens in a circuit with a short transmission line?
In a circuit with a “short” line, the terminating (load) impedance dominates circuit behavior. The source effectively sees nothing but the load’s impedance, barring any resistive losses in the transmission line. In a circuit with a “long” line, the line’s own characteristic impedance dominates circuit behavior.
How is the length of a transmission line related to its phase?
Even though we know that signal magnitudes along the line’s length are not equal at any given time due to signal propagation at (nearly) the speed of light, the actual phase difference between start-of-line and end-of-line signals is negligible, because line-length propagations occur within a very small fraction of the AC waveform’s period.