Response to the following problem:
Sketch and label the voltage-transfer characteristic vO versus vI of the circuit shown in Figure over a ±10-V range of input signals. Use the diode exponential model and assume that all diodes are 1-mA units (i.e., each exhibits a 0.7-V drop at a current of 1 mA).
What are the slopes of the characteristics at the extreme ±10-V levels?
![2443_voltage-transfer.jpg](https://secure.tutorsglobe.com/CMSImages/2443_voltage-transfer.jpg)