PATENT CLAIM ANALYSIS

Application Number: 15964620
Application Type: Utility
Filing Date: 2018-04
Publication Date: 2019-01
Patent Classification: ["363", "020000"]

Abstract:
Active clamp flyback power converter. At least some of the example embodiments are methods including: activating a main FET and thereby inducing positive current flow in a primary winding, the positive current flow resulting in reverse biasing of a rectifier of a secondary circuit; deactivating the main FET and thereby forward biasing the rectifier in the secondary circuit and causing current flow in the secondary winding; activating a clamp FET and thereby coupling a clamp capacitor to a leakage inductance of a transformer, the primary circuit having initially a positive current flow through the primary winding and then a negative current flow through the primary winding; and regulating the negative current flow through the primary winding.

Claim (Index 11):
A semiconductor device for controlling an active clamp flyback power converter, the semiconductor device comprising:\n a substrate of semiconductor material; an oscillator defined on the substrate, the oscillator has a clock output and a modulate input, the oscillator configured to generate a clock signal at a clock frequency on the clock output based on a modulate signal received on the modulate input; a voltage sense circuit defined on the substrate, the voltage sense circuit has a sense input and a sense output, the sense input configured to couple to a signal indicative of current flow through a primary winding of a transformer of the power converter, and the voltage sense circuit configured to generate a sense signal on the sense output; a modulation circuit defined on the substrate, the modulation circuit has a clock input, a sense input, and a modulate output, the clock input coupled to the clock signal, the sense input coupled to the sense signal, and the modulate output coupled to the modulate input of the oscillator; a clamp control circuit defined on the substrate, the clamp control circuit has a clock input, a sense input, and a clamp drive output, the clock input of the clamp control circuit coupled to the clock signal, the sense input of the clamp control circuit coupled to the sense signal, and the clamp drive output configured to couple to a gate of a clamp field effect transistor (FET) of the power converter; a main control circuit defined on the substrate, the main control circuit has a sense input, a feedback input, and a main drive output, the sense input of the main control circuit coupled to the sense signal, the feedback input configured to couple to a feedback signal from a secondary side of the power converter, and the main drive output configured to couple to a gate of a main FET of the power converter; the main control circuit is configured to assert the main drive output responsive to the sense signal falling through a first predetermined threshold, and the main control circuit further configured to de-assert the main drive output based on the feedback signal; the clamp control circuit is configured to assert the clamp drive output responsive to the sense signal rising through a second predetermined threshold after the main drive output is de-asserted, and the clamp control circuit further configured to de-assert the clamp drive output responsive to assertion of the clock signal; and the modulation circuit is configured to monitor the sense signal, and configured to regulate the clock frequency of the clock signal by changing the modulate signal driven to the modulate output based on the sense signal.

Metadata:
- Claim Count in Document: 4.0
- Percentile: 91.0
- Lexical Diversity: 2.33962
- Patent Class: 363.0
- Transitional Phrase Type: open
- Component Type: 1
- Foreign Priority: False
- Related Applications: ['15137683', '15711825', '14975692', '15334173', '11206356']

Analysis Scores:
- 35 USC 101 Eligibility (BERT): 0.8086607900822698
- 35 USC 102 Novelty (BERT): 0.4724474215135045
- Combined Prediction Score: 0.7750394532253932
- Mean Citation Score: 196.619604
- Max Citation Score: 207.88565
- Similarity Product: 167.4914741144955

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