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Broadband, upper sideband terminated, low-noise parametric amplifier

Image Number 3 for United States Patent #3992675.

A parametric amplifier which includes series coupled diodes contained in a resonating wave guide for providing a low noise figure by limiting the impedance to the idler circuit and inhibiting current flow in the upper sideband circuit. The mechanism for inhibiting current flow of the upper sideband circuit is independent of the characteristic impedance of the resonating wave guide to provide a constant, low power requirement, with high gain and broadband performance.

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