Fast Voltage-Driven Current Source


Posted on Feb 6, 2014

The current source in the diagram, which react very fast to changes in the input signal, may be used, for instance, in certain measurements. Differential amplifier IC1 ensures that the potential across R2 is equal to the input voltage: Iout =Uin/R2. The bandwidth, B, is given by B=R2 f /RL, where f=80 MHz, and the load impedance RL‰¥ R2 (both in


Fast Voltage-Driven Current Source
Click here to download the full size of the above Circuit.

ohms). The input is terminated into R1 to give the usual 50 impedance required by measuring instruments. At the same time, this resistor sets the d. c. operating point. If the link to the driving signal source is short and d. c. coupled, R1 may be omitted. The peak voltage between pins 1 and 2 of the IC is limited to 2. 1 V to prevent too large a current at the output. Therefore, the peak output current is 2. 1/100=21 mA.




Leave Comment

characters left:

Related Circuits

  • New Circuits

    .

     


    Popular Circuits

    Single injector-tracer
    Hook Sensor Loop Circuit
    Light Dark Sensor With Relay Circuit Using LM741
    Credit card sized ethernet arduino controller
    bcd diagram
    Melody Generator Circuit using UM66
    bq51013 Receiver Circuit Restarts
    3volt fm transmitter for 88mhz
    Audio Signal Generator
    Calculo Odometria
    Forklift battery circuit



    Top