The Design of a Variable Bandwidth, Constant Gain Receiver for Use in Ionospheric Sounding at 30 MC/SEC

摘要

A major feature of this filter is that its bandwidth may be varied at an extremely rapid rate, as rapid a rate as that of the associated local oscillator frequency.nJust what application this may see is yet to be determined, but the author believes the techniques used here represent a new tool for the electronic engineer.