Filter analyzer (CB8227E)

Found in a 90s Popular Electronics, this circuit is interspersed between the filter and the oscilloscope input for analysis.

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Low Drift Sampling and Hold (CB5954E)
This low drift or offset circuit is from an 80's documentation. The configuration can be made with...
Precision Half Wave Rectifier (CB11228E)
This circuit rectifies low voltage sinusoidal signals for measurement purposes, as the circuit is of low...
RIAA Equalizing Preamplifier (CB4947E)
Indicated for vinyl media recovery, this circuit is from the 80's, having been found in an...