Self test $11\mathrm{.}1$: A transducer can be modelled by a current

source i s in parallel with a resistor RS$.$ An amplifier is

required to provide a current proportional to is to a load

resistor RL$.$ RS and RL can both vary between $1$ k$$ and

$10$ k$.$ The variation in load current corresponding to the

specified variation in Rs is to be no more than $10\%.$

Similarly, the variation in load current corresponding to the

specified variation in RL is to be no more than $10\%.$ Also, for

i s $=10$ A the amplifier is to provide a minimum of $1$ mA to

the load.

What type of amplifier is required? Sketch the circuit model

of the amplifier and select appropriate values for its

parameters.