I have a 12VDC @50mA_Max supply line. I need to inject a +2V 50us offset pulse to the +12VDC line, having an effective +14V for 50us.
I have access to an external power supply, where I can have higher voltages.
What would be the best way to achieve this?
I was thinking about just generating +14VDC and joining both lines with a P-Channel Mosfet for 50us. The +14VDC would be able to supply more current than the +12VDC line so it should be able to inject the extra +2V. However, I think there must be a more elegant way of doing it.