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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Guitar Fuzz (CB26213E)
This common circuit using operational amplifiers was found in the 1993 issue of Radio Electronics Special...
ISL 85005x Buck Synchronous Regulator - Intersil
September 2017 - Intersil's ISL850x Synchronized Buck Regulators can be ordered from Mouser...
Long Interval Timer (CB1521E )
The time constant of this circuit is 100 x R1 x C1, which leads to the possibility of obtaining times...