PATENT CLAIM ANALYSIS

Application Number: 16195712
Application Type: Utility
Filing Date: 2018-11
Publication Date: 2019-05
Patent Classification: ["363", "021140"]

Abstract:
A switching power supply circuit with synchronous rectifier has an energy storage component, a rectifier switch coupled to a secondary side of the energy storage component, and a secondary side control circuit. The secondary side control circuit provides a driving signal to control the rectifier switch. When the drain-source voltage across the rectifier switch is less than a first threshold value, the secondary side control circuit controls the driving signal to be a maximum voltage to control the rectifier switch being fully on for a predetermined duration. After a predetermined duration, the secondary side control circuit adjusts the voltage of the driving signal based on the drain-source voltage across the rectifier switch and a second threshold value.

Claim (Index 9):
The switching power supply circuit of  claim 8 , wherein the predetermined duration generating circuit further comprises:\n a capacitor; a first current source, configured to provide a charging current for the capacitor, wherein the charging current is configured to be directly proportional to the drain-source voltage across the rectifier switch, and the first current source is configured to charge the capacitor when the primary side switch is turned on; a second current source, configured to provide a discharging current for the capacitor, wherein the discharging current is configured to be directly proportional to a difference between the drain-source voltage across the rectifier switch and the output voltage, and the second current source is configured to discharge the capacitor when the rectifier switch is turned on; a third comparison circuit, configured to receive a voltage across the capacitor and a duration adjustment voltage, and configured to generate a reset signal based on a compare result of the voltage across the capacitor and the duration adjustment voltage; and an output logic circuit, configured to generate the predetermined duration signal according to the reset signal and the drain-source voltage across the rectifier switch, wherein when the drain-source voltage across the rectifier switch is detected at a rising edge, the output logic circuit is configured to be set, the predetermined duration signal is configured to change to a first state, and when the voltage across the capacitor is less than the duration adjustment voltage, the output logic circuit is configured to be reset and the predetermined duration signal is configured to change to a second state.

Metadata:
- Claim Count in Document: 4.0
- Percentile: 98.0
- Lexical Diversity: 2.40385
- Patent Class: 363.0
- Transitional Phrase Type: none
- Component Type: 0
- Foreign Priority: True
- Related Applications: ['13478575', '13966248', '15061192', '14290621', '16022645']

Analysis Scores:
- 35 USC 101 Eligibility (BERT): 0.8413124621472525
- 35 USC 102 Novelty (BERT): 0.4938479201042901
- Combined Prediction Score: 0.8065660079429563
- Mean Citation Score: 256.14009000000004
- Max Citation Score: 265.99088
- Similarity Product: 215.95486154777527

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