We found this circuit in an Analog Devices documentation from the 1990s. It provides an approximation for the sine ꬾ of an input voltage. It is used in analog computing.
This astable multivibrator configuration causes two LEDs to alternately flash at a frequency...
In the figure we show our first circuit that consists of a simple touch switch capable of driving a...
This electromyography monitor is from a 1978 publication on operational amplifiers. The components are...