Figure 8.17. On the left is a single pole, double throw, SPDT, switch. Its swinger is grounded. Each of the stationary contacts goes through a 10 k ohm resistor to Vcc. There are two, two-input NAND gates one positioned above the other. The top switch contact goes to one of the inputs of the top gate. The bottom switch contact goes to one of the inputs of the bottom gate. The output of the top gate goes to the other input of the bottom gate. The output of the bottom gate goes to the other input of the top gate. The output of the top gate goes to the Q output and the output of the bottom gate goes to the not Q output. End verbal description.
Go back.