US 10,502,763 B2 · Noise reduction in digitizing systems

Abstract

Disclosed are systems and methods related to a noise reduction device employing an analog filter and a corresponding inverse digital filter. The combination and placement of the filters within the systems aids in reducing noise introduced by processing the signal. In some embodiments, the combination of filters may also provide for increased flexibility when de-embedding device under test (DUT) link attenuation at higher frequencies. Further, the filters are adjustable, via a controller, to obtain an increased signal to noise ratio (SNR) relative to a signal channel lacking the combination of filters. Additional embodiments may be disclosed and/or claimed herein.

Claims20

Dependent claims

A noise reduction device for a test and measurement system, comprising:

an analog filter configured to adjust a first frequency band of an electrical signal relative to a second frequency band of the electrical signal in accordance with a first frequency transfer function to produce a modified signal;
an analog-to-digital converter coupled with an output of the analog filter and configured to produce a digital signal based on the modified signal;
and
a digital filter coupled with the analog-to-digital converter and configured to:
produce a filtered signal, from the digital signal, based on a second frequency transfer function that is an inverse of the first frequency transfer function, and
output the filtered signal for additional processing by the test and measurement system.

3 more elements

Dependencies are inferred from the claim text.

Facts

Application

15/395,416Filed 30 Dec 2016 · us provisional application

Priority

12 May 2016

Published

US 2017/0328932 A116 Nov 2017

Granted

10 Dec 2019

Term ends

Not estimatedThe source records don’t support an estimate.

Classification6 codes

G01R 13/0218
For displaying measured electric variables in digital form: circuits therefor
G01R 13/0272
Circuits therefor: for sampling
H03M 1/0626
Characterised by the use of methods or means not specific to a particular type of detrimental influence: by filtering
H03M 1/12
Analogue/digital conversion; Digital/analogue conversion: analogue/digital converters

Noise reduction in digitizing systems

Life of this patent

Noise reduction in digitizing systems

Life of this patent

Abstract

Claims20