Measurement of distortion in an amplifier
First Claim
Patent Images
1. A method, comprising:
- inputting a stimulus signal approximating a Gaussian noise signal limited to a frequency band into an amplifier wherein said stimulus signal comprises a notch in a portion of said frequency band and wherein the stimulus signal comprises a plurality of frequency spaced tones where the number of tones is a function of the bandwidth of the frequency band;
measuring amplitude and phase distortion in the notch portion of said frequency band from the output of the amplifier; and
recording the measured amplitude and phase distortion.
1 Assignment
0 Petitions
Accused Products
Abstract
Parametric measurement of first- and second-generation telecommunications equipment has been relatively straightforward. The evolution to more complex transmission schemes such as those proposed for third-generation (3G) telecommunications devices can employ the subject methods and apparatus and apply AM-PM test procedures to a multicarrier amplifier RF environment to properly characterize the parametric performance of these transmission systems, particularly those operating in a multicarrier environment.
-
Citations
18 Claims
-
1. A method, comprising:
-
inputting a stimulus signal approximating a Gaussian noise signal limited to a frequency band into an amplifier wherein said stimulus signal comprises a notch in a portion of said frequency band and wherein the stimulus signal comprises a plurality of frequency spaced tones where the number of tones is a function of the bandwidth of the frequency band; measuring amplitude and phase distortion in the notch portion of said frequency band from the output of the amplifier; and recording the measured amplitude and phase distortion. - View Dependent Claims (2, 3, 4, 5, 6, 7)
-
-
8. A system, comprising:
-
an arbitrary waveform generator that generates a stimulus signal approximating a Gaussian noise signal limited to a frequency band into an amplifier wherein said stimulus signal comprises a notch in a portion of said frequency band and wherein the stimulus signal comprises a plurality of frequency spaced tones where the number of tones is a function of the bandwidth of the frequency band; and a spectrum analyzer that measures amplitude and phase distortion in the notch portion of the frequency band from the output of the amplifier. - View Dependent Claims (9, 10, 11, 12)
-
-
13. A system, comprising:
-
means for generating a stimulus signal approximating a Gaussian noise signal limited to a frequency band into an amplifier wherein stimulus signal comprises a notch in a portion of said frequency band and wherein the stimulus signal comprises a plurality of frequency spaced tones where the number of tones is a function of the bandwidth of the frequency band; and means for measuring amplitude and phase distortion in the notch portion of the frequency band from the output of the amplifier. - View Dependent Claims (14, 15, 16, 17, 18)
-
Specification