Hi frankrose
Thanks for your reply.
I was referring to that the difference between an OTA and an opamp was the output stage. Opamp=OTA+output stage. An opamp is used to drive a small resistive load because the output stage have a low output resistance. And OTA is used in, for example, switched capacitor circuit, is only to drive a capacitive load and no resistive load. (so the high output resistance won't be reduced by paralleling a small resistor )
Then how does the OTA with a capacitive load situation handle the big output time constant problem, which lead to the slow charging time?
Thanks
Allen
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Hi BigBoss
Thanks for your reply.
I was referring to that the difference between an OTA and an opamp was the output stage. Opamp=OTA+output stage. An opamp is used to drive a small resistive load because the output stage have a low output resistance. And OTA is used in, for example, switched capacitor circuit, is only to drive a capacitive load and no resistive load. (so the high output resistance won't be reduced by paralleling a small resistor )
Then how does the OTA with a capacitive load situation handle the big output time constant problem, which lead to the slow charging time?
Thanks
Allen