Electricity: measuring and testing – Impedance – admittance or other quantities representative of... – Parameter related to the reproduction or fidelity of a...
Patent
1996-06-28
1998-08-04
Brown, Glenn W.
Electricity: measuring and testing
Impedance, admittance or other quantities representative of...
Parameter related to the reproduction or fidelity of a...
324620, 324 7678, 330 2, G01R 2320, H03G 320
Patent
active
057899274
ABSTRACT:
An RF power amplifier distortion measurement system measures amplitude and phase distortion of a microwave/RF power amplifier by phase quadrature down-conversion of each of an RF amplifier's input signal and amplified output signals to baseband in-phase (I) and quadrature (Q) components, and performing RF amplifier distortion measurements on these down-converted baseband I and Q signals. The derived error measurement signal is remodulated to RF by phase quadrature up-conversion circuitry to produce an up-converted RF signal that corresponds to the RF distortion component contained in the RF output signal produced by the RF power amplifier.
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patent: 3781669 (1973-12-01), Dick
patent: 4792751 (1988-12-01), Blumenkranz et al.
patent: 5381108 (1995-01-01), Whitmarsh et al.
patent: 5394120 (1995-02-01), Sakamoto et al.
patent: 5561395 (1996-10-01), Melton et al.
Brown Glenn W.
Spectrian
Wands Charles E.
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