Full wave rectifier (CB9455E)

This precision signal rectifier was found in an Electronic Design. The components used are from that time, uncommon nowadays.

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Weighted Average Circuit (CB19909E)
This circuit was originally designed with the operational 747 which is rare today. However, the...
15 to 4800 Hz Variable Oscillator (CB13742E)
This circuit was found in a 1975 technical publication. The circuit can be designed with 741...
4 W amplifier TDA2613 (CB15989E)
The TDA2613 is the mono version of the TDA1521A and has pinouts compatible with an integrated...