Gated SR Latch (continued)
So the operation of the latch is as follows:
when C = 0, no change occurs
when C = 1, the SR excitation table of Fig. 6.11a and the characteristic equation describe its function.
If the AND gates are changed to NAND gates and cross-coupled NAND gates are used for the SR latch, the circuit of Fig. 6.13b results.
The NAND gate implementation of the gated SR latch is shown in Fig. 613.c.
The generic logic symbol for the gated SR latch is shown in Fig. 6.13d.