Voltage to current converter using operational amplifier

1. Voltage to Current
Converter Using
Op-Amp

2. Voltage to current converter using Opamp
• Floating Load Voltage to Current Converter
• Ground Load Voltage to Current Converter

3. • Floating Load Voltage to Current Converter
The load current is controlled by
the resistor, R. Here, the
proportionality constant is 1/R.
So, this converter circuit is also
known as Trans-Conductance
Amplifier. Other name of this
circuit is Voltage Controlled
Current Source.
Current series negative feedback
amplifier

4. • Ground Load Voltage to Current Converter

5. Current to Voltage Converter

7. NonLinear-Applications:
Comparators:

8. Comparators
■ A comparator is a specialized nonlinear op-amp circuit that
compares between two input voltages and produces an output state
that indicates which one is greater. Comparators are designed to be
fast and frequently have other capabilities to optimize the
comparison function.
■ In this application, the op-amp is used in the open-loop
configuration, with the input voltage on one input and a reference
voltage on the other.