Found in a 1970 documentation, this circuit makes use of 741 operational amplifiers that are common today. Note that the power supply must be symmetrical.
This analog thermometer was obtained from an English documentation. The sensor is a common diode...
This circuit is a kind of Hertz Loop that can be used to check the operation of transmitters and...
Two 3-terminal regulators like the LM317 can be used to "clip" a sinusoidal signal, in order to...