Bandpass filter with two operational (CB20939E)

This circuit makes use of two transconductance operators. We found it in National Semiconductor documentation from the 1980s.

| Clique na imagem para ampliar |

Regulator series (CB22267E)
Found in an American documentation from the 1960s, this circuit uses transistors from the time. The...
Galvanometer Amplifier 741 (CB19471E)
In the figure we have a typical configuration with operational, which can be different from the...
Limiter with diodes (CB7513E)
This limiting circuit or Clipper was found in a 1977 documentation. The circuit uses only passive...