[Scott Dorsey]

Arny Krueger wrote:
"Eeyore" wrote in

Oh there is, but since a classic Class A output has such
high standing dissipation you use more devices in
parallel and you're actually working them at lower
currents than in A/B.

I think I saw the effects of beta fall-off in my testing. I was working
with 8 devices up and 8 devices down. VCC was about 80 volts. The devices
were complements from the MJE 1502x series.

Admittedly, one go add enough devices so that beta fall-off wouldn't be an
issue.

If you don't mind non-complementary output stages, there are truly
gargantuan MOSFETs available today for electric motor control applications.
Most aren't designed for linearity, but some careful selection may help.
--scott
--
"C'est un Nagra. C'est suisse, et tres, tres precis."