PATENT CLAIM ANALYSIS

Application Number: 16257781
Application Type: Utility
Filing Date: 2019-01
Publication Date: 2019-06
Patent Classification: ["363", "021110"]

Abstract:
A switching power supply apparatus includes a PFM control circuit that outputs a clock signal Set such that a switching frequency of a switching element varies in accordance with a load state. The clock signal Set determines a turn-on timing of the switching element. A reference value of a current flowing through the switching element determines a turn-off timing of the switching element. A modulation signal is applied to the turn-off timing of the switching element to modulate one of a peak value of a drain current flowing through the switching element and an on-time of the switching element. Input control is performed separately on the clock signal Set and the modulation signal. Accordingly, even when the clock signal Set and the modulation signal contribute to each other to offset each other, modulation effects are not cancelled.

Claim (Index 1):
A switching power supply apparatus comprising:\n a transformer that includes a primary coil and a secondary coil; a switching element that is connected in series with the primary coil; a control circuit configured to control a switching operation of the switching element to perform switching control on a first DC voltage that is input to the switching element via the primary coil; an output voltage generation circuit configured to convert an AC voltage induced in the secondary coil to a second DC voltage, and supply an output current to a load; and an output state detection circuit configured to output a feedback signal in accordance with the second DC voltage of the secondary coil or the output current of the secondary coil, wherein: the control circuit includes:\n a turn-on signal generation circuit configured to generate a turn-on signal of the switching element, the turn-on signal being cyclic pulse signals, an oscillation frequency of which is adjusted, when the cyclic pulse signals are output, in accordance with the feedback signal such that the second DC voltage or the output current is constant; and \n a turn-off signal generation circuit configured to generate a turn-off signal of the switching element, the turn-off signal generation circuit configure to disconnect electrically to the feedback signal, \n the turn-off signal generation circuit includes:\n a current detection circuit configured to detect a current flowing through the switching element and output a detection value corresponding to the current; \n a modulation signal generation circuit configured to generate a modulation signal that is a periodic signal; and \n a timing modulation circuit configured to modulate a generation timing of the turn-off signal in accordance with the modulation signal, \n the timing modulation circuit includes a comparator, and a reference value is input to one of input terminals of the comparator, the detection value output from the current detection circuit is input to another of the input terminals of the comparator, and the reference value is modulated in accordance with the modulation signal.

Metadata:
- Claim Count in Document: 10.0
- Percentile: 99.0
- Lexical Diversity: 2.26562
- Patent Class: 363.0
- Transitional Phrase Type: open
- Component Type: 1
- Foreign Priority: True
- Related Applications: ['15595606', '14275348', '16017922', '12128652', '11700924']

Analysis Scores:
- 35 USC 101 Eligibility (BERT): 0.8138887411880495
- 35 USC 102 Novelty (BERT): 0.5379720748963651
- Combined Prediction Score: 0.7862970745588811
- Mean Citation Score: 335.233568
- Max Citation Score: 377.05237
- Similarity Product: 373.62210735464566

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

Dataset: test