prcken
Advanced Member level 1
How to do TIA AC simulation to characterize tranimpedance?
since the transfer function of a TIA is transimpedance, how to plot that with cadence spectre?
it has only voltage and current plot options in AC analysis, i set input AC current to 1A, My question is
1. the transimpedance AC response is just the output voltage magnitude
2. or add a series voltage source (set to 0V) between input bonding pad inductance and the input of the TIA, then translate the transimpedance with output voltage divide that voltage source current? I found the current of that 0 voltage source i added is frequency dependent for there is photodiode parasitic cap and bonding pad inductance.
the latter method shows a better transimpedance vs frequency plot
Thanks!
since the transfer function of a TIA is transimpedance, how to plot that with cadence spectre?
it has only voltage and current plot options in AC analysis, i set input AC current to 1A, My question is
1. the transimpedance AC response is just the output voltage magnitude
2. or add a series voltage source (set to 0V) between input bonding pad inductance and the input of the TIA, then translate the transimpedance with output voltage divide that voltage source current? I found the current of that 0 voltage source i added is frequency dependent for there is photodiode parasitic cap and bonding pad inductance.
the latter method shows a better transimpedance vs frequency plot
Thanks!
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