Variable passive network noise filter for noise reduction
AssigneeTektronix, Inc.
InventorsJohn J. Pickerd, Pirooz Hojabri
Life of this patent
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Abstract
Disclosed is a noise filter. The noise filter includes an input port to receive an analog signal. The noise filter further includes a multiplexer coupled to the input port. The multiplexer separates the analog signal into a plurality of frequency bands. The frequency bands include a high frequency band and a low frequency band. The noise filter also includes a low-band variable attenuator coupled to the multiplexer. The low-band variable attenuator adjustably attenuates the low frequency band relative to the high frequency band.
Claims20
A noise filter comprising:
- an input port to receive an analog signal;
- a multiplexer, coupled to the input port, to separate the analog signal into a plurality of frequency bands including a high frequency band that includes a higher frequency portion of the analog signal and a low frequency band that includes a lower frequency portion of the analog signal;
- and
- a low-band variable attenuator, coupled to the multiplexer, to adjustably attenuate the low frequency band relative to the high frequency band to mitigate noise in the high frequency band.
A method comprising:
- receiving, at an input port of a noise filter, an analog signal;
- separating, at a multiplexer of the noise filter, the analog signal into a plurality of frequency bands including a high frequency band and a low frequency band;
- and
- adjustably attenuating, at a low-band variable attenuator of the noise filter, the low frequency band relative to the high frequency band to mitigate signal loss in the analog signal.
A computer readable storage medium having instructions stored thereon that, when executed by a processor of a noise filter, cause the noise filter to:
- separate the analog signal into a plurality of frequency bands including a high frequency band and a low frequency band;
- and
- adjustably attenuate the low frequency band relative to the high frequency band to mitigate noise in the input signal.
Dependencies are inferred from the claim text.