Negative Voltage supply is very much necessary in Analog circuits and it is extremely necessary if you are playing with dual polarity signals also called as bipolar signals. Although there are number of solutions available to generate negative supply. But Best and easy of them is the converting current positive supply in to the negative. This saves your design time and component cost. And I must say, I am impressed by such small-little IC named ICL7660 . I used the one from Intersil, CMOS Voltage Converter, apparently all the other Semiconductor Manuf. Produce them. Pinout- ICL7660 Background story goes like this We were involved in building data acquisition system to conduct the field survey , required for the tidal energy generation program. We were supposed to measure all the critical environmental parameters in the area where tidal power plant is to be built. Parameters like Temperature, Humidity and Pressure in surrounding atmosphere, Wate...
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