ICdesignerbeginner
Member level 5
Hi
I want help in OTA-C filter design. OTA can be tuned its electronically tunable device. If OTA is a linear OTA using source degeneration MOS then do I have to vary the resistance of the source degenerated MOS or do I have to vary the biasing current to tune the OTA to vary its gm?
Secondly, If I have dsigned a GM-C filter then do I have to tune all OTAs resistance incase of source degenerated MOS used in OTA or tune all transistors biasing currents or just can I vary the current or resistance of one OTA only?
Thanks & regards
I want help in OTA-C filter design. OTA can be tuned its electronically tunable device. If OTA is a linear OTA using source degeneration MOS then do I have to vary the resistance of the source degenerated MOS or do I have to vary the biasing current to tune the OTA to vary its gm?
Secondly, If I have dsigned a GM-C filter then do I have to tune all OTAs resistance incase of source degenerated MOS used in OTA or tune all transistors biasing currents or just can I vary the current or resistance of one OTA only?
Thanks & regards