dick_freebird said:I do not notice any glitches in the waveform plots.
dick_freebird said:I do not notice any glitches in the waveform plots.
dick_freebird said:I think that is the Miller capacitance, pushing back on a weak
gate discharge. Perhaps you want more tail current. Or
perhaps less finger count in the switching pairs. Current
density tends to maximize speed. That CML gate is basically
a tall cascode amplifier, high impedance at the drain.
High Z tends to lower bandwidth. To that end, have you
played with shortening the bias devices? Lower Zout might
"up the bandwidth" at the upper gates.
LvW said:To me it looks like the result of parasitic oscillations within the circuit.
To check it, remove the input and terminate the input by the proper source impedance.
prcken said:LvW said:To me it looks like the result of parasitic oscillations within the circuit.
To check it, remove the input and terminate the input by the proper source impedance.
you meant try to tie the input through a proper resistor to ground?
the waveform of the inputs seems ok, this the input waveforms after the AC capacitance.
LvW said:prcken said:LvW said:To me it looks like the result of parasitic oscillations within the circuit.
To check it, remove the input and terminate the input by the proper source impedance.
you meant try to tie the input through a proper resistor to ground?
the waveform of the inputs seems ok, this the input waveforms after the AC capacitance.
Yes, but without any input signal you can see if there are parasitic oscillations!
karesz said:Hi prcken,
Sorry, but if Im right; your circuit oscillates inself, than these signal will interfer with your input or regular signal...
These is the effect of form changes too if your tested-simulated frequency are changed/lowered! :-(
Good progress!
K.
karesz said:OK,
These function was new for me-tnx!
Other question, that a signal output has to be clean here too, but you knows it...
K.
love_analog said:prcken
What process is this in? You see the voltage is >1.1V.
Also can you post a schematic of the circuit. That will help.
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