[[전압이득,voltage_gain]] - [[전압,voltage]]
{
단위: V/V 또는 dB

The '''voltage gain''', $A_v,$ is defined as
 $A_v = \frac{v_{\rm out}}{v_{\rm in}}$

gain을 [[데시벨,decibel]](dB)로 나타내면 {  dB = 20 log (V/1V) or 20 log (I/1A), dBm = 20 log (V/1mV) or 20 log (I/1mA), dBW = 10 log (P/1W) ??  }
 $\left.A_v\right|_{\rm dB} = 20\log\frac{v_{\rm out}}{v_{\rm in}}$
}

개루프 전압이득 open-loop voltage gain
{
[[루프,loop]] > open_loop
}

폐루프 전압이득 closed-loop voltage gain
{
[[루프,loop]] > closed_loop
}

(이 둘은 see Hayt 9e ko p219)

전력이득 power_gain
[[전력이득,power_gain]]
{
'''전력이득, power_gain'''

power gain ≡ load power / input power
$A_p \equiv \frac{P_L}{P_I}=\frac{v_o i_o}{v_I i_I}$
(Sedra)

[[전력,power]]
WpEn:Power_gain
}

전류이득 current_gain
[[전류이득,current_gain]]
{
'''전류이득, current gain'''

[[전류,electric_current]]
}

안테나이득 antenna_gain
{
WpKo:안테나_이득
[[WpEn:Gain_(antenna)]]
}

아래는 별도의 분야?

[[칼만_이득,Kalman_gain]]
{

rel. [[칼만_필터,Kalman_filter]]
}

----
[[증폭기,amplifier]]
[[증폭,amplification]]
[[연산증폭기,opamp]]
[[비,ratio]]
[[비율,rate]]

[[WpKo:이득]]
[[WpEn:Gain_(electronics)]]