This circuit featuring a new quadruple operational amplifier was found in the March 1980 issue of Radio Electronics magazine. The circuit is to be powered by a symmetrical 15 V source.
This amplifier became famous in the 1970s, it was sold in kit by Ibrape, Philips subsidiary for...
In the figure we have a receiver for frequency modulated light signals (see the transmitter in...
This circuit is from an Italian magazine Radio Elettronica of January 1977. The circuit shows how...