PATENT CLAIM ANALYSIS

Application Number: 15880242
Application Type: Utility
Filing Date: 2018-01
Publication Date: 2019-07
Patent Classification: ["370", "497000"]

Abstract:
A frequency-selective system that may be used as, or as part of, an add/drop multiplexer. An input signal is fed to a Mach-Zehnder interferometer configured to drop, or suppress, by destructive interference, a signal component in a first frequency band from among a plurality of frequency bands. One or more bandpass filters in one arm of the Mach-Zehnder interferometer suppress other frequencies, outside of the first frequency band, so that signals at these other frequencies are not suppressed by destructive interference and are present at the output of the Mach-Zehnder interferometer. A coupler connected after the output of the Mach-Zehnder interferometer adds, into the signal path, a replacement for the dropped signal.

Claim (Index 16):
The frequency selective system of  claim 15 , wherein:\n the variable gain amplifier is an amplifier having an electronically controllable gain; and the feedback control system is further configured to estimate a gain error and to feed back to the electronically controllable gain to reduce the gain error, the gain error being the difference between a present gain in the first path, and a gain for which:\n a contribution, at a first frequency in the first frequency band, from the first path, to a signal at the output of the second coupler, has the same amplitude as a contribution at the first frequency, from the second path, to the signal at the output of the second coupler.

Metadata:
- Claim Count in Document: 8.0
- Percentile: 86.0
- Lexical Diversity: 1.81159
- Patent Class: 370.0
- Transitional Phrase Type: none
- Component Type: 0
- Foreign Priority: False
- Related Applications: ['14854415', '10838985', '10775799', '11369529', '10344154']

Analysis Scores:
- 35 USC 101 Eligibility (BERT): 0.5623253662797812
- 35 USC 102 Novelty (BERT): 0.4777449166324435
- Combined Prediction Score: 0.5538673213150475
- Mean Citation Score: 176.95356999999996
- Max Citation Score: 192.9188
- Similarity Product: 146.0185517982483

Labels:
- Claim Label 101: 1
- Claim Label 102: 1
- Claim Label 103: 1
- Claim Label 112: 1
- Combined Label: 1
- Label 101 Adjusted: 1

Dataset: test