Hello!
I have a question concerning a circuit i made. It uses an opamp as an voltage reference, which is variable, and can thus control the voltage that appears on the OUT.
The circuit acts like there is a variable voltage drop accross a shunt diode. The voltage drop is equal to Vref and the drop of the diode used. The circuit seems to be wrking fine on Ltspice. However, i need many of those circuits in a thing i'm building and using so many opamps seems to be space consuming since they would be all wired as a buffer. Is there another way to make a voltage reference with very little space consuming parts and still very low output impedance. The current capability doesn't have to be high, but it is important that no series resistance appears to be in series with the diode (max few hundred ohms). Any ideas?
I have a question concerning a circuit i made. It uses an opamp as an voltage reference, which is variable, and can thus control the voltage that appears on the OUT.
The circuit acts like there is a variable voltage drop accross a shunt diode. The voltage drop is equal to Vref and the drop of the diode used. The circuit seems to be wrking fine on Ltspice. However, i need many of those circuits in a thing i'm building and using so many opamps seems to be space consuming since they would be all wired as a buffer. Is there another way to make a voltage reference with very little space consuming parts and still very low output impedance. The current capability doesn't have to be high, but it is important that no series resistance appears to be in series with the diode (max few hundred ohms). Any ideas?