[Test-Equipment] Transistor Circuit Design Question

[David DiGiacomo]

On Mon, May 25, 2015 at 6:33 PM, Barry <n4buq at knology.net> wrote:
> I have a situation where I have strobe and data signals originating from a 3870 CMOS microprocessor (part of a Fluke 8050A) that I need to convert to make them compatible with the display/latch I'm using to retrofit a different display.
>
> The strobe is currently a positive-going pulse from -5V to 0V (GND).  I wish to make this a negative-going pulse from +5V to 0V (GND).

1. The 3870 is NMOS, not CMOS.

2. Why don't you connect your new display between -5V and ground also?