This circuit is from a 1969 EEE magazine. The transistors are from that time, but the circuit can be implemented with modern equivalents, such as 2N2646 for Q3.
This circuit is from a Popular Electronics from July 1990. The magazine no longer exists, but the...
Other operational amplifiers series, such as MC34072, MC34074, MC35071, MC35072, MC35074 d MC33071...
This gain 10 CMOS op amp was found in the May 1993 issue of Electronics Now magazine. It is...