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 7):
An amplifier circuit as claimed in  claim 3  wherein the threshold generator is configured to determine said first threshold based on at least one of: voltage regulator efficiency; amplifier efficiency; audio load impedance; audio load inductance; a minimum audio frequency; and amplifier gain.

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): 0.6857647769203306
- 35 USC 102 Novelty (BERT): 0.493482876663633
- Combined Prediction Score: 0.6665365868946609
- Mean Citation Score: 217.590838
- Max Citation Score: 227.12703
- Similarity Product: 179.78305955288528

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