and
Madhava Panicker P. R.
Dept of Applied Electronics & Instrumentation,
Rajagiri School of Engineering & Technology,
Kakkanad - 682039
madhava panicker@rajagiritech.ac.in
Vh
Vi
VI
Fig. I . Conventional Window Comparator circuit op-amp's
is usually expressed in VI fJs. Almost all the general purpose
op-amps available in the market Iike LM 741 have a very low
slew rate at about 0.5V 1 fJs. Op-amps having much higher slew
rates are also available but at a higher cost. For a high speed
switching op-amp such as LM 6361, which has a slew rate of
300V 1 fJs, the price is 1000Rs and above. Simple circuits such
as the window comparator circuit which require high precision,
but on a strained budget theretore needs some alternative.