2007-09-16 18:51:17 · 3 answers · asked by yan yan 1 in Science & Mathematics ➔ Engineering
Capacitor coupling definitely affects amplifier frequency response, and is the limiting factor in the low frequency capability. The coupling capacitor forms an RC circuit with the input impedance of the following stage and in series with the output impedance of the preceding stage. The time constant of this circuit is determines the frequency at which the response is 3db down from frequencies well above this point, and continues dropping at a rate of 6db per octave for lower frequencies. If the capacitor is too small for the stage impedances, low frequency response will suffer.
2007-09-16 19:00:41 · answer #1 · answered by gp4rts 7 · 3⤊ 0⤋
Any capacitor will affect amplifier frequency response because a capacitor passes lower frequencies more poorly.
2007-09-17 02:37:10 · answer #2 · answered by quicksilv3rflash 3 · 0⤊ 1⤋
Sure it does. As the frequency decreases the coupling impedance between stages increases so the gain goes down.
Doug
2007-09-17 01:56:03 · answer #3 · answered by doug_donaghue 7 · 3⤊ 0⤋