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回复 Gautau
G版你好!请问SRPP电路,下管不用阴极電容,引入本级阴极反馈时,应如何计算?谢谢!
xyzxkam 发表于 15-4-2012 17:56
"It is usual to add a cathode bypass capacitor to the lower cathode. Leaving it out will hardly affect the gain in this case, but it would increase the anode impedance which makes the stage more susceptible to noise and increases output impedance. Since the frequency response will be hardly afftected, there is little point calculating the bypass capacitor's value carefully, any value greater than 1uF should do."
旁路电容对增益几无影响,但会提高下管的內阻,使噪音更容易受到感。频应方面亦只會有微小的影響。
虽然旁路电容的计算方面与共阴基本相同,但因对电路的影响不大,只要大于 1μF 便可。 |
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