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True, but the circuit as shown would be purposeless, though. An unloaded Howland current source would have balanced positive and negative feedback, but as said, a different output connection.As long as the negative feedback factor is more than the positive feedback factor, you can hook up circuits like that (assuming a stable circuit required and not an oscillator).
Not related to your schematic, but a Howland current source does.but commonly, what configuration that uses a feedback network on both the input terminal of the op amps?
I want to be the part of this discussion.
As you all said, the schematic is drawn wrong. But I want to ask why? In post#5 of @AMS012, he has given link in which opamp has positive and negative feedback simultaneously. And @dann11's circuit has also both feedbacks simultaneously. The one which is maxim's is correct and @dann11's is wrong. Why why why??
Regards,
Princess
I think the circuit posted in the first post should work fine. Though it has two inputs, isn't it just the superposition of the two inputs?