Voltage Controlled Voltage Source


Posted on Feb 7, 2014

The disadvantage of the circuit above is that the supply of the op-amp is tied to the HV supply. Most op-amps are limited to around 30V on the supply, so the circuit wont work for higher output voltages. The circuit below avoids this this problem by inserting a n-channel mosfet, which can be fully controlled within the range of the op-amps power s


Voltage Controlled Voltage Source
Click here to download the full size of the above Circuit.

upply. The output voltage is directly proportional to the control voltage. R1 and R4 should be chosen such that Vgs(max) of Q2 is never exceeded. Likewise Q2 should have an Idss greater than VHV. The circuit below is a voltage controlled voltage reference. The output voltage is directly proportional to the control voltage. Note that the control voltage and feed back input of the op-amp is swapped. The capacitor stops oscillation, and should only be placed on the output. The circuit will tend to oscillate if a capacitor is placed across the feedback network, for example across R9. Do you need help with an electronics design Daycounter provides contract electronics design services. Contact us to give you a quote on your electronics design project.




Leave Comment

characters left:

Related Circuits

  • New Circuits

    .

     


    Popular Circuits

    Simple power Supply for LEDS
    radio remote control using dtmf circuit
    Logarithmic resistor ladder
    opt301 laser receiver
    555 timer voltage controlled oscillator
    programming propeller ic
    Field-strength meters
    Nixie Clock Version 1
    inverter for household appliance
    1998 DeVille: front power windows work ok left front window switch
    Suppressor circuit diagram for singing karaoke
    Automatic level control circuit
    A-3-7-type air compressor control circuit



    Top