This circuit was found in a 1980s Signetics documentation. The integrated circuit is from the era. The circuit enables coded matrix control via a toggle switch.
The gain of the Operational Amplifier in the figure is given by the ratio between R1 and R2. In...
This conventional window comparator configuration was found in an old documentation. It is valid...
This circuit uses a Norton operational amplifier to generate 1 kHz pulses with a 1 to 60...