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zobel network in MOSFET power amplifiers
zobel network in MOSFET power amplifiers
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Old 7th August 2012, 05:31 PM   #1
davidel94 is offline davidel94  Italy
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Location: Verona
Smile zobel network in MOSFET power amplifiers

I'm making a MOSFET amplifier and I have these questions:
the gate zobel network is better if it is from gate to drain or from gate to ground?
In case of gate to ground at what ground should i connect it, feedback ground, power ground or loudspeaker ground?
Finally for the output zobel network what ground should I use?
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Old 7th August 2012, 05:48 PM   #2
Osvaldo de Banfield is offline Osvaldo de Banfield  Argentina
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Location: Barrio Garay,Almirante Brown, Buenos Aires, Argentina
Zobel network must be placed across speaker terminals, neither at gate nor drain of any FET. This is to correct the impedance seen from the amplifier at high frequencies when the speakers makes more and more inductive impedance and "rejects" power back to the amplifier.
Osvaldo F. Zappacosta. Electronic Engineer UTN FRA from 2001.
Argentine Ham Radio LW1DSE since 1987.
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