Solution Found!
Design the circuit shown in Figure DP 3-8 to have an output io 1.8 mA when the input
Chapter 3, Problem DP 3-8(choose chapter or problem)
Design the circuit shown in Figure DP 3-8 to have an output \(i_{\mathrm{o}}=1.8 \mathrm{~mA}\) when the input is \(i_{\mathrm{s}}=5 \mathrm{~mA}\). The circuit should require no more than 1 mW from the current source.
Questions & Answers
QUESTION:
Design the circuit shown in Figure DP 3-8 to have an output \(i_{\mathrm{o}}=1.8 \mathrm{~mA}\) when the input is \(i_{\mathrm{s}}=5 \mathrm{~mA}\). The circuit should require no more than 1 mW from the current source.
ANSWER:
Step 1 of 3
Applying the current division rule to the given circuit yields
It is required to have = 1.8 mA when = 5mA. Thus,
or
………. (1)
Another requirement is that the circuit should require no more than 1 mW from the current
source. The power supplied by the current source is
or
Let us choose
……… (2)