the_legend
Newbie level 5
Hello there,
Please I need help with the following: How to do stb analysis using cdmdprobe for a fully diff. OTA with capacitive feedback. I understand that for unity feedback the input common is defined and equals the output common mode. However, for capacitive feedback the input common mode is not defined ! I thought to connect a very large inductor to the OTA input but the results are not correct at all. I also thought to connect a large resistance in parallel with the feedback capacitor but I suspect the results. Can you please help ?
Another question please, for the OTA to be used in a switched capacitor circuit, do I still need a common mode feedback ? I think that the output common mode is defined in one phase and this can be enough to guarantee the output common mode level. Is that correct ?
Please I need help with the following: How to do stb analysis using cdmdprobe for a fully diff. OTA with capacitive feedback. I understand that for unity feedback the input common is defined and equals the output common mode. However, for capacitive feedback the input common mode is not defined ! I thought to connect a very large inductor to the OTA input but the results are not correct at all. I also thought to connect a large resistance in parallel with the feedback capacitor but I suspect the results. Can you please help ?
Another question please, for the OTA to be used in a switched capacitor circuit, do I still need a common mode feedback ? I think that the output common mode is defined in one phase and this can be enough to guarantee the output common mode level. Is that correct ?