Question 1: What happens if the resistor values of Figure 7 are changed? Change R1 and R2 with 1 kΩ resistors. What happens to the amplitude of the output waveform? Revert R1 and R2 to their previous values. Change R3 and R4 with 1 kΩ resistors and again, observe the output waveform.
Answer 1:
When R1 and R2 are replaced with 1 kΩ resistors, the amplitude of the output waveform decreases. This is because R1 and R2 control how much of the input (sum and difference) signals are fed into the diode ring. Increasing their resistance limits the current reaching the diodes, making the switching action less effective and reducing the strength of the output signal.
However, when R3 and R4 are changed to 1 kΩ, the amplitude of the output waveform may increase. These resistors form the load across which the output is measured. A higher resistance reduces the load on the circuit, allowing for a potentially greater voltage swing.
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