Figure 4.6. There are two parts to this figure. In part eh, there are 4 terminals, 2 on the left and 2 on the right. There is a transistor centered between them. The lower left terminal connects to the emitter of the transistor. The upper left terminal connects to the base of the transistor. The lower right terminal connects to the emitter of the transistor. The upper right terminal connects to the collector of the transistor. In part b there are also 4 terminals but the two sets, right and left, are farther apart because there is more stuff between them. The lower left terminal connects to the lower right terminal and this line is designated common. The terminals on the left are labeled V sub b e. The upper left terminal has an arrow next to it indicating the I sub B is flowing to the right. The upper left terminal connects to a resistor labeled h sub i e. The other end of this resistor is connected to the plus end of an ideal voltage source which is labeled V sub c e times h sub r e. The other end of the voltage source is connected to common. An arrow next to the upper right terminal indicates that I sub c is flowing to the left. The right hand terminals are labeled V sub c e. There is a resistor connected between the two terminals labeled h sub o e. There is an ideal current source connected in parallel with the resistor. It is labeled I sub b times h sub f e. The arrow in the current source is pointing downwards. Remember that the lower right terminal is connected to common. End verbal description.