This 1967 General Electric circuit makes use of an array of 3 (integrated) transistors for an amplifier stage. The circuit has a 500 mV output.
November 2016 - Maxim's MAX30003, an Analog Front End (AFE) for biopotentials with clinical grade...
This buzzer trigger can be used for small alarms. We find it in an 80’s American documentation. The...
This transistor source has the output voltage selected by zeners and the LED indication of which...