Programmable Twin T Band Pass Filter (CB6244E)

This circuit was found in an American 1980s documentation. Dual FETs can be replaced by single equivalents. Control voltage ranges from 0 to 1 V.

| Clique na imagem para ampliar |

Fiber Optic Interface (CB6233E)
This circuit was found in Motorola documentation from the 1980s. The components are of the time,...
Simple MW Radio 4 (CB4362E)
Originally this circuit is from an English magazine, but I found it in Argentina's Radio Chassis...
Comparators for opposite polarities (CB9590E)
This circuit was found in a 1980s documentation, using a comparator from the time. The...