Small signal amplifier using MOSFET

157

03:56:57

I'll enter details such as gain later. Title is self-explanatory for now

published 11 years ago

hurz

11 years ago

As expected for MOS, the THD @ 1kHz is 0.67%

hurz

11 years ago

go up to 1.2MOhm for ground input resistor and you get a THD <0.12%. Because the operating point Ud is with 1Meg a bit high ~15V. With 1.2M its around 10V, Ub/2. Keep it up!

acpcalin

11 years ago

Thanks for the tip! Will do :)

hurz

11 years ago

One more tip, the input cap 22uF is quite high. Input resistance is 1.2M||3M=857kOhm, for a 3dB corner freq at 20Hz calc 1/(2*pi*20Hz*857kOhm)=9.3nF next would be 10nF, which is much smaller than 22uF. Keep it up!

acpcalin

11 years ago

Thanks! Seems like I got ways to go before I fully understand this type of amplifier

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