I am more showing than asking...
I got to wondering how fast a 555 timer could be after seeing information on the MIC1555.
So, entered the schematic of the NE555 from application note AN170 in the 1988 Signetics Linear Data Manual Volume 2, Industrial. I tried to format the schematic the same as the original; including using the same device reference designators. All of the resistor values are taken from the schematic.
Changes I made:
I used high speed transistors: the 2N2369 for the NPN and the 2N5771 for the PNP.
I substituted 1N4148 diodes for the diode-connected transistors.
I added the timing resistors and capacitor to the 555 schematic so that I could simulate an operating circuit.
With just those changes, the circuits works!
I got to wondering how fast a 555 timer could be after seeing information on the MIC1555.
So, entered the schematic of the NE555 from application note AN170 in the 1988 Signetics Linear Data Manual Volume 2, Industrial. I tried to format the schematic the same as the original; including using the same device reference designators. All of the resistor values are taken from the schematic.
Changes I made:
I used high speed transistors: the 2N2369 for the NPN and the 2N5771 for the PNP.
I substituted 1N4148 diodes for the diode-connected transistors.
I added the timing resistors and capacitor to the 555 schematic so that I could simulate an operating circuit.
With just those changes, the circuits works!
Attachments
-
7.9 KB Views: 29