Figure 3 Bias curve for a typical varactor diode
-Refer to Fig 3. For the varactor diode shown, the CR between 0.5 V and 10 V is approximately
A)18
B)11
C)5.9
D)1.5

Question

Figure 3 Bias curve for a typical varactor diode
-Refer to Fig 3. For the varactor diode shown, the CR between 0.5 V and 10 V is approximately
A)18 
B)11 
C)5.9 
D)1.5

Quizplus · Accepted Answer

The Capacitance Ratio (CR) for a varactor diode is calculated as the capacitance at the lower voltage divided by the capacitance at the higher voltage. From the graph in Fig 3 (which is not visible here, but assuming a typical varactor diode characteristic), the capacitance at 0.5 V is significantly higher than at 10 V. The CR of approximately 5.9 indicates that the capacitance at 0.5 V is 5.9 times higher than at 10 V, which is a characteristic behavior of varactor diodes as the reverse bias voltage increases, the junction capacitance decreases.

Figure 3 Bias Curve for a Typical Varactor Diode