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 20):
An active clamp flyback power converter comprising:\n a primary circuit comprising:\n a primary winding of a flyback transformer having a first terminal coupled to an input node, and a second terminal defining a switch node; \n a main field effect transistor (FET) coupled between the switch node ground or common of the primary circuit; \n a clamp FET in series with a clamp capacitor, the clamp FET and clamp capacitor coupled between the input node and the switch node; \n a secondary circuit comprising:\n a secondary winding of the flyback transformer; and \n a rectifier coupled between a terminal of the secondary winding and ground or common of the secondary circuit; \n a controller defining a main drive output coupled to a gate of the main FET, a clamp drive output coupled to a gate of the clamp FET, and a current sense input coupled to the primary circuit; the controller is configured to:\n activate the main FET and thereby induce a positive current flow in the primary winding, the positive current flow resulting in reverse biasing of the rectifier of the secondary circuit; \n deactivate the main FET and thereby forward bias the rectifier in the secondary circuit and cause current flow in the secondary winding; \n activate the clamp FET and thereby couple the clamp capacitor to a leakage inductance of the flyback 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 \n regulate the negative current flow through the primary winding.

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): 0.809204354700602
- 35 USC 102 Novelty (BERT): 0.4689066190391169
- Combined Prediction Score: 0.7751745811344535
- Mean Citation Score: 196.619604
- Max Citation Score: 207.88565
- Similarity Product: 173.28768807429074

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

Dataset: test