Hi Borko,
yes, I was exploring the Transnova common source topology and easily detectable benefits are: easier biasing - simpler circuitry, grounded Sources - no need to isolate Lateral MOSFETs from the heatsink.
Also, it most naturally fits the complementary folded cascode input stage (which I like the best). Since the output stage delivers very linear voltage gain the input stage is not overtaxed - it needs to swing only couple of volts for full power output (40 W / 4R in this case). Total result is exceptional.
How does this amp (combination of "complementary folded cascode input + Lateral MOSFET common source output", (schematic attached in below post)) compares with Juma's "mini-F5" amp with (complementary bjt input + Lateral MOSFET common source output) as given below link: https://www.diyaudio.com/community/threads/recommendation-for-5-10w-amp.255523/#post-3911652
Provided 5-10w output is sufficient for our requirement.
The amp shown in the10th post of this thread is noticeably better. OTOH, the mini single-rail BJT+LAT F5 look-alike is much simpler and easier to build.
Hi Juma,
thanks for the inputs..
also can we use BC546BTA & BC556BTF in place of BC547C & BC557C in the "mini single rail BJT+LAT F5 like" amp ? Seems Hfe of BC546BTA is less than BC547C. Or do we need to look for the high Hfe transistors for more gain in these circuits ? Also in the data sheet of BC547, its showing BC550 being low noise alternative.