[Amps] matched MOSFETs

[Walter Muth]

Hi Steve,


Steve Thompson wrote::

>On Thursday 30 October 2003 10:25, Walter Muth wrote:
>  
>
>>Hi,
>>
>>what would be the best parameters you can give to characterize a
>>"matched  pair " for a high power push-pull amp design ( lets think
>>about 600watts)
>>
>>Vgs(th) and gfs ?
>>    
>>
>
>Provide separate bias setting pots and there's no need to match Vgs
>
thats what we did on our old MRF150 amp....

>  
>
>>What tolerances may be acceptable?
>>    
>>
>
>+/- 10% on gm was a normal selection when I was on that side of things. If the 
>devices come from the same batch code, use separate bies adjusters and 
>there's probably no need to do any matching.
>
thats what a manufacturer told me ...

Thanks


73
Walter
DK1BN