This precision full-wave rectifier used in instrumentation was found in a technical documentation from the 1980s. Diodes are general-purpose types.
This source was found in Philips' 60s documentation. The transistors are from the era and the...
This circuit is the digital indicator for the previous circuit and can be used with similar...
Found in a 90s Electronic Design, this circuit operates with Maxim components of the time. The...