On Tue, 28 Oct 2025, Jon Elson wrote:
On 10/28/25 14:03, Martin Bishop via cctalk wrote:
Schotky diode the keep the base out of saturation ?
As used in 74S 74LS, appreciate it's an extra component to bodge in
see eg
https://electronics.stackexchange.com/questions/242715/using-a-schottky-diode-to-improve-pnp-transistor-turn-off-time
That's called a Baker clamp, was commonly used back in the mid '60s.
That is a nice idea. We will try that and find out if this helps. I am
also thinking of using *cough* P-channel MOSFETs like BS250 instead.
There must be a solution with available parts ;-)
Christian
