PATENT CLAIM ANALYSIS

Application Number: 15903734
Application Type: Utility
Filing Date: 2018-02
Publication Date: 2018-08
Patent Classification: ["381", "120000"]

Abstract:
This application relates to amplifier circuits for amplifying an audio signal. An amplifier circuit ( 100 ) has a voltage regulator ( 201 ) for outputting a supply voltage to an amplifier ( 104 ). An output capacitor ( 103 ) coupled to an output node of the voltage regulator. The voltage regulator is operable in a voltage-control mode to maintain the output voltage (V S ) at a nominal output voltage and in current-control mode to limit the input current drawn to exceed a defined limit. A controller ( 301 ) is operable in a first mode to define the nominal output voltage so as not to exceed a first voltage magnitude and in a second mode to define the nominal output voltage to be equal to a second, higher, voltage magnitude. The controller ( 301 ) monitors the audio signal for a high-amplitude part of the audio signal, that could result in the voltage regulator operating in the current-control mode to apply current limiting and, on such detection swaps from the first to the second mode until such a high-amplitude part of the audio signal has been amplified. The second voltage magnitude is greater than required for voltage headroom for amplifying the high-amplitude part of the audio signal so as to allow for a voltage droop of the output voltage over a plurality of switching cycles of the voltage regulator when operating in the current-control mode.

Claim (Index 13):
An amplifier circuit as claimed in  claim 1  wherein in the first mode of operation the controller is configured to vary the nominal output voltage of the voltage regulator based on the indication of the level of the audio signal.

Metadata:
- Claim Count in Document: 44.0
- Percentile: 88.0
- Lexical Diversity: 2.68817
- Patent Class: 381.0
- Transitional Phrase Type: none
- Component Type: 0
- Foreign Priority: True
- Related Applications: ['11482020', '14315863', '14182798', '15350431', '14805454']

Analysis Scores:
- 35 USC 101 Eligibility (BERT): 0.685537918626513
- 35 USC 102 Novelty (BERT): 0.4945918767403466
- Combined Prediction Score: 0.6664433144378964
- Mean Citation Score: 217.590838
- Max Citation Score: 227.12703
- Similarity Product: 177.54344285598992

Labels:
- Claim Label 101: 1
- Claim Label 102: 1
- Claim Label 103: 1
- Claim Label 112: 0
- Combined Label: 1
- Label 101 Adjusted: 1

Dataset: test