Ratio discriminator
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United States of America Patent
Stats
-
Jan 6, 1987
Grant Date -
N/A
app pub date -
Mar 25, 1985
filing date -
Apr 3, 1984
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A ratio discriminator is disclosed which can provide an exact indication of the achievement of tuning and is unaffected by drifts and variations in the components or supply or reference voltages. The discriminator includes a modulated signal input, an intermediate frequency circuit comprising first and second inductively coupled tuned oscillating circuits, wherein the first circuit is connected to the input and the second oscillating circuit has a secondary winding equipped with an intermediate tap connected to a first terminal of a tertiary winding; and a detector circuit coupled to the second oscillating circuit and having an output terminal. The tertiary winding is at a reference DC voltage, at a second terminal thereof, and connected with its first terminal to the output terminal.
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