PATENT CLAIM ANALYSIS

Application Number: 15898691
Application Type: Utility
Filing Date: 2018-02
Publication Date: 2018-08
Patent Classification: ["323", "282000"]

Abstract:
A switching power supply circuit, which keeps an output voltage constant highly accurately by a buck-boost action, is provided. The switching power supply circuit comprises: a switching circuit formed by combining four switching elements with a coil in the shape of H; a coil current emulation circuit for generating an output voltage VC similar to a coil current; and a control circuit which, based on a feedback voltage representing an output voltage VO of the switching circuit, and the output voltage VC, performs on-off control of the switching circuit. The coil current emulation circuit has a CR integration circuit to generate the output voltage VC similar to the coil current. One of three voltages is applied to one terminal of the CR integration circuit, while a voltage proportional to the output voltage VO is applied to the other terminal of the CR integration circuit. The three voltages are a voltage proportional to an input voltage VIN, a ground voltage, and a voltage proportional to the sum of the input voltage VIN and the output voltage VO.

Claim (Index 1):
A switching power supply circuit, comprising:\n a switching circuit having a first switching element connected between an input terminal, where an input voltage is applied, and one terminal of a coil; a second switching element or a first diode connected between a ground potential and the one terminal; a third switching element connected between the ground potential and another terminal of the coil; and a fourth switching element or a second diode connected between an output terminal and the other terminal; a coil current emulation circuit for generating an output voltage similar to a coil current flowing through the coil; and a control circuit which, based on a feedback voltage representing an output voltage being a voltage of the output terminal, and the output voltage of the coil current emulation circuit, performs on-off control of the switching circuit to have the switching circuit carry out a predetermined buck-boost action so that the output voltage generated at the output terminal of the switching circuit becomes a predetermined set voltage, wherein the coil current emulation circuit has a CR integration circuit, and provides an output terminal, between a capacitor and a resistor constituting the CR integration circuit, for outputting the output voltage similar to the coil current, one of three voltages is applied to one terminal of the CR integration circuit by selection associated with an on/off action of switch means, while a voltage proportional to the output voltage is applied to another terminal of the CR integration circuit, and the three voltages are a voltage proportional to the input voltage, a ground voltage, and a voltage proportional to a sum of the input voltage and the output voltage, and on/off control of the switch means is performed by a control signal which is outputted by the control circuit in accordance with a state of the one terminal and the other terminal of the coil.

Metadata:
- Claim Count in Document: 9.0
- Percentile: 88.0
- Lexical Diversity: 2.74286
- Patent Class: 323.0
- Transitional Phrase Type: open
- Component Type: 1
- Foreign Priority: True
- Related Applications: ['14561066', '12640236', '14557133', '12674349', '13280471']

Analysis Scores:
- 35 USC 101 Eligibility (BERT): 0.754363557402431
- 35 USC 102 Novelty (BERT): 0.4917245375993274
- Combined Prediction Score: 0.7280996554221206
- Mean Citation Score: 267.556542
- Max Citation Score: 274.86252
- Similarity Product: 231.9615170760155

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