We found this circuit in the 1982 SGS linear integrated circuit manual. The L149 is not common today and the circuit can be implemented with equivalents.
The sophisticated white noise generator we present uses four 741 operational amplifiers. The...
This circuit was found in an old manual of linear integrated circuits of the 80's. Equivalent...
The source used in this timer is of the type without transformer and regulated by the 7 W zener. The...