Digital phase meter and phase detection method
AssigneeLeonardo Mw Ltd
InventorChristopher Edward GREGORY
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Abstract
A wideband digital phase meter and phase detection method are disclosed. The device measures a phase difference between 2 signals and is suitable for integration into a single MMIC. The input signals are compared digitally by using two EXOR gates and integrated over a phase comparison period. The resultant analogue signals are digitised using an Analogue to Digital convertor. Additionally, 2×D-Type registers are used to resolve the (0° to 180°) or (180° to 360°) ambiguity of the EXOR phase detector.
Claims6
A wideband phase meter comprising:
- a B channel having a first IP buffer Y, a first phase detector B, and a first ambiguity resolver Y arranged in a mirror image in a horizontal plane with an A channel having a second IP buffer X, a second phase detector A and a second ambiguity resolver X;
- and
- combining means for combination of the A and B channels to provide an output signal substantially free from distortion.
A method of reducing phase measurement error in a wideband phase meter, the method comprising:
- cross-coupling EXOR gates and D-Flip-flops of the wideband phase meter to reduce phase measurement error.
Dependencies are inferred from the claim text.