PATENT CLAIM ANALYSIS

Application Number: 15928447
Application Type: Utility
Filing Date: 2018-03
Publication Date: 2019-05
Patent Classification: ["381", "120000"]

Abstract:
A class-D amplifier includes an output driver, a pulse width modulator, an integrator, and duty cycle control circuitry. The output driver is configured to drive a loudspeaker. The pulse width modulator is coupled to the output driver. The integrator is coupled to the pulse width modulator. The duty cycle control circuitry is coupled to the integrator. The duty cycle control circuitry is configured to monitor amplitude of output signal of the integrator, and change an average duty cycle of signal at an output of the output driver as a function of the amplitude.

Claim (Index 17):
An integrated circuit, comprising:\n a class-D audio amplifier, comprising:\n an output driver comprising an H-bridge configured to drive a loudspeaker; \n a pulse width modulator configured to provide input to the output driver; \n an integrator configured to provide input to the pulse width modulator; and \n duty cycle control circuitry coupled to the integrator, the duty cycle control circuitry comprising:\n thresholding circuitry comprising:\n a first comparator coupled an output of the integrator, the first comparator is configured to compare amplitude of signal output by the integrator to a first threshold value; and \n a second comparator is coupled the output of the integrator, the second comparator is configured to compare the amplitude to a second threshold value; \n wherein the first threshold is higher than the second threshold; \n \n a comparing circuit coupled to the thresholding circuitry and configured to determine, based on outputs of the first comparator and the second comparator, whether an average duty cycle of signal at an output of the output driver is to be changed; \n duty cycle adjustment circuitry coupled to the comparing circuit and configured to change the average duty cycle based on an output of the comparing circuit; \n wherein the average duty cycle is an average of a duty cycle of signal produced at a first loudspeaker drive terminal of the H-bridge and a signal produced at a second loudspeaker drive terminal of the H-bridge.

Metadata:
- Claim Count in Document: 11.0
- Percentile: 90.0
- Lexical Diversity: 2.86111
- Patent Class: 381.0
- Transitional Phrase Type: open
- Component Type: 1
- Foreign Priority: False
- Related Applications: ['14521191', '15278862', '15726584', '15443889', '15345885']

Analysis Scores:
- 35 USC 101 Eligibility (BERT): 0.7122254081671553
- 35 USC 102 Novelty (BERT): 0.493464316859699
- Combined Prediction Score: 0.6903492990364096
- Mean Citation Score: 249.208448
- Max Citation Score: 257.7233
- Similarity Product: 205.94547077656983

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