Question

3) Input Resistance: Similarly, real circuits like your DAD Board's Oscilloscope also have input resistances. FROM DAD Board Osciloscope Chanel 1+Vscope Rin 1- Figure 2 shows a simple model for your DAD Board's Scope. A. What strategy could you use to test the input resistance of your DAD's Scope Think about what component you could add in series or in parallel to change Vscope and calculate Rin

Answer 1

Vscope is the voltage which is measured by oscilloscope.

hence we can easily calculate Rin by simply applying a DC voltage source and a resistance in series to Rin and then use voltage divide rule.

Oscilloscope Rs RinVscope

Let Vs is a source voltage and Rs is source resistance whose values are known

Apply Vs across Rs and Rin

by Voltage divide rule

Rin 27t scope Rint R

Vscope can be calculated from oscilloscope directly

then

scope

ˇ scope Rs in- 71 s V scope