This circuit is from 1964 documentation but can be easily implemented based on current components. Input waveforms and detection are shown next to the diagram.
The voltage gain of this DC amplifier is 100 times, given by the relationship between R2 and R1....
This device works with conventional analog phones where the headset is a magnetic type. The signal...
This full-wave precision circuit was obtained from a 90's Radio Electronics. The circuit must be...