How can I have a high-current buffer for the op-amp in Howland current source?

Thread Starter

Tran Binh Duong

Joined Aug 1, 2016
1
You can do it, in principle, with a Howland current pump. However, you will need an op amp that can put out ±150mA and ±15V at up to 100kHz. This might require a combination of an op amp and a high-current buffer, and a heat sink.
Dear Ron,
How can I have a high-current buffer for the op-amp in Howland current source?
I mean that I need a bipolar buffer placed at the output of op-amp.

PS: I want to make a AC Current Source based on Howland Current Source which be able to put out 1A and ±15V at up to 50Hz-10kHz.


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Please don't hijack other member's thread, now you have your own.
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This thread was split from -- AC constant current source.
 

AnalogKid

Joined Aug 1, 2013
12,050
Are the 1 A and +/-15 V requirements RMS or peak values?
Is one end of the load connected to the system ground?
What is the amplitude of the signal source?

ak
 
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