This circuit generates pulses whose frequency depends on C1. The circuit can be powered by voltages from 5 to 15 V. We find this configuration in a Signetics manual.
This simple preamplifier was published in Radio Electronics magazine in February 1958. The battery...
The sensors in this circuit are NTCs and PTCs that work in a differential way by directly...
This interesting op-amp signal generator circuit was found in a 1977 documentation. The circuit has...