Numerical on Voltage to Current Converter with Grounded Load

Q.  Determine the values of load current and output voltage respectively for the below schematic of voltage to current converter with grounded load by assuming that the op-amp is nulled at the inception.

- Published on 26 Oct 15

a. 0.3 mA & 4V
b. 30 mA & 4V
c. 300 mA & 2V
d. 30 mA & 2V

ANSWER: 0.3 mA & 4V
 
Given data :
From the circuit, the given values are:
Vin = 10V, R = 30K & V1 = 2V

We know that load current depends on input voltage resistance R in case of voltage to current converter.

Thus, IL = Vin / R
= 10V / 30K
= 0.3 mA

However, the output voltage (Vo) of voltage to current converter is given by,

Vo = 2 V1 = 2 x 2 = 4V.

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