Cancellation of Unwanted Spectral Components in an FM Multivibrator System |
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Authors: | Monson James E |
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Institution: | Harvey Mudd College, Claremont, Calif.; |
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Abstract: | The performance of FM multivibrator systems for high quality communications applications is limited by the presence of unwanted spectral components. A theory is presented for an improved system in which unwanted spectral components are cancelled, achieved by generating a cancelling component in a square-law device. The cancelling component tracks the unwanted component in both frequency and amplitude over a wide bandwidth of signal frequencies. Reductions in magnitude of the unwanted components by at least 16 dB are predicted; reductions of better than 14 dB have been achieved in practice. |
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