> On Jan 1, 2018, at 09:39, Manfred Mornhinweg <manfred@ludens.cl> wrote:
>
> Hi all,
>
> after my rather pointless post moments ago about the ICAS-CCS debate, here is
> a somewhat more meaty year-starter for those of you who do enjoy hands-on
> amplifier building.
>
> I'm currently developing an SDR that uses an MRF1K50N in the final stage. My
> intention is to run this in Envelope Tracking mode (ET), with a linear class
> AB driver stage and running the final stage in saturated class-AB. I intend
> to use a bank of relay-switched series-input low-pass filters, because such
> filters offer a high impedance to harmonics. The LDMOSFET, running in
> saturation, behaves closely like a voltage source, producing a voltage
> waveform approaching a square wave, while the series-input low-pass filter
> takes a roughly sine-shaped current. So this could be considered a form of
> class-F operation.
>
https://www.youtube.com/watch?v=Ac7G7xOG2Ag
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