. Electronic apparatus for biological research . Blumlein integrator Figure Control of Miller run-downâWe have now to discuss how to derive the square wave which allows the Miller run-down to occur. There are a number of possible ways, depending on what is wanted. If the requirement is for independent control of the duration and slope of the wave (from which it follows that the amplitude will vary) then all that is necessary is to precede the Blumlein integrator with a flip-flop. The flip-flop 243

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