We are trying to drive an 50ohm load with a 2.5Vpp pulse at a 12MHz data rate. We need very fast edges even though the datarate is slow.
Here is the input signal into the amplifier. We are using 40GHz BW ATC coupling caps. This bias current is 81mA.
The amplifier output.
This example is at 3.5Vpp swing. The Vctrl control has no effect (between 0.5 to 2V).
What is the DC block capacitor value you are using? When high and low levels are long enough and cap value is high, this type of behavior is common. Also the part is driving 50ohms source correct?
Marking answered for lack of reply.