power_pwer
Junior Member level 1
- Joined
- Jun 11, 2012
- Messages
- 17
- Helped
- 0
- Reputation
- 0
- Reaction score
- 0
- Trophy points
- 1,281
- Activity points
- 1,415
dear all:
plz help me with the filter overshoot problem:
the topology of my filter is shown in the left side in pic NO.1;the driver stage of the amplifier used in this filter is a classAB driver shown in the right side in pic NO.1 . there is large overshoot in the amplitude-frequency response plot,but the overshoot will be attentuated when the MOS number of the driving stage is bigger, i wonder why?
when MOS number=4
pic NO.2 show the amplitude-frequency response;
pic NO.3 show the step reponse
pic NO.4 show the detailed step response,there are rings we can see
when MOS number=40
pic NO.5 show the amplitude-frequency response
pic NO.6 show the detailed step response
plz help me with the filter overshoot problem:
the topology of my filter is shown in the left side in pic NO.1;the driver stage of the amplifier used in this filter is a classAB driver shown in the right side in pic NO.1 . there is large overshoot in the amplitude-frequency response plot,but the overshoot will be attentuated when the MOS number of the driving stage is bigger, i wonder why?
when MOS number=4
pic NO.2 show the amplitude-frequency response;
pic NO.3 show the step reponse
pic NO.4 show the detailed step response,there are rings we can see
when MOS number=40
pic NO.5 show the amplitude-frequency response
pic NO.6 show the detailed step response
Attachments
Last edited:
