这个计算器计算偏置电压和电流，以及增益和频率响应。 R1 (KΩ) R2 (KΩ) RC(Collector resistor)集电极电阻 (KΩ) RE(Emitter resistor)发射极电阻 (KΩ) VP(Supply Voltage)电源电压 (V) Beta(DC Current Gain)直流电流增益 VBE(Base to emitter drop)基极-发射极压降 (V) Rs(Source Resistance): 电源内阻 (Ω) RL(Load resistor)负载电阻 (Ω) fT(Current Gain BW Product):电流增益带宽 (MHz) CCB(Cu Collector-Base Cap.): 集电极与基极间电容 (pF) CBE(Cπ, Base-Emitter Cap.):基极和发射极之间的电容(可选) (pF)
VC(Collector Voltage)集电极电压	(V)
VE(Emitter Voltage)发射极电压	(V)
VB(Base Voltage)基极电压	(V)
IE(Emitter Voltage)发射极电压	(mA)
IC(Collector Voltage)集电极电压	(mA)
IB(Base Voltage)基极电压	(mA)
gm(Transconductance)跨导
rπ(Input Resistance of BJTat low freq)晶体管输入阻抗,低频率的	(Ω)
re	(Ω)
RIN(Input Resistanceof Amp)放大器输入阻抗	(KΩ)
A(Amplifier Voltage Gain)放大器的电压增益
fP1	(MHz)
fP2	(MHz)

Equations

V_B= VP*R2/(R1+R2)

V_E= V_B-V_BE

I_E=V_E/R_E

Alpha= Beta/(Beta+1);

I_C=Alpha*I_E

V_C= VP - I_C*R_C/2

I_B=I_C/Beta

g_m= Ic/25mA

r_e= Alpha/g_m

r_π= Beta/g_m

A=Alpha*r_π*R_C/(R_s+2*r_π)/r_e

f_P1=1/(2*π*(R_s||2*r_π)*(C_BE/2+C_BC))

f_P2=1/(2*π*R_C*C_BC)

f_T=g_m/(2π*(C_BE+C_BC))