Analog Circuits Cookbook

Advanced circuit techniques,components and concepts 27

Figure 1.19 (a) Elantec EL2019

fast,

high voltage comparator with master

slave flip-flop offers typical set-up and hold times of 12 ns and -3 ns respectively,

(b) The three-state TTL compatible output stage draws a constant supply current,

preventing supply line glitches, (c) This feature, plus the fact that the output can

change state only following a positive clock edge, prevents the possibility of oscil-

lation, (d) Using the chip select bar three-state feature to monitor several inputs.

(Elantec Inc.)

input changes in either direction, subject of course to the finite gain of the

comparato ...