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AC Current Amplifier

Shekhar Kulkarni
Intellectual 880 points
Other Parts Discussed in Thread: OPA561, OPA567

I want to convert 5v 1mA 100KHZ signal to 1A AC Signal with 100KHZ

Please suggest a circuit.....

  • 0
    TI__Guru* 93105 points

    Hi Shekhar,

    I suggest using the Improved Howland Current Pump with a power operational amplifier; the OPA561,or OPA567. The application not only calls for high current, but fairly high bandwidth to support the 100 kHz requirement.

    I have attached a schematic showing a proposed current pump that sinks and sources 1 Amp peak. The OPA561 is used in this circuit. The 1 mA input current is established by the 1 k resistor across the 5 VPK input source. Likely, the circuit will require some optimization.

    Regards, Thomas

    PA - Linear Applications Engineering