Obtain commercially available bipolar transistors and enhancement type n-channel and p-channel MOSFETs for the construction of a BiCMOS inverter as shown in Figure 11.17. From the manufacturer’s Web pages, obtain the data sheets for all three types of transistors.
1. Determine and plot the unloaded voltage transfer characteristic, using hand calculations, for the case of VDD
= 5 V.
2. Using SPICE, determine and plot the unloaded voltage transfer characteristics with VDD
as a parameter. Consider cases in which VDD
= 5 V, 3.3 V, 2.5 V, 1.8 V, and 1.5 V.
3. Build the inverter and measure the unloaded voltage transfer characteristics using the x–y feature of an oscilloscope or virtual instrument and a low-frequency input signal (1 kHz). Consider cases in which VDD
= 5 V, 3.3 V, 2.5 V, 1.8 V, and 1.5 V
4. Plot the logic swing vs. the supply voltage from the SPICE and experimental results. What can be concluded from these results?
Figure 11.17