PATENT CLAIM ANALYSIS

Application Number: 16154459
Application Type: Utility
Filing Date: 2018-10
Publication Date: 2019-06
Patent Classification: ["375", "316000"]

Abstract:
An IF filter band-limits an intermediate frequency signal outputted from a mixer. An AFC unit controls the oscillation frequency of a PLL so that the frequency of the intermediate frequency signal is a predetermined frequency. When the AFC unit controls the oscillation frequency of the PLL, a band control unit controls the passing characteristic of the IF filter to the passing characteristic of a wide band, and after the completion of the control, controls the passing characteristic of the IF filter to the passing characteristic of a narrow band. A frequency correction unit refers to a filter information storage unit, and corrects the oscillation frequency controlled by the AFC unit according to the difference between the center frequency of the passband of the passing characteristic of the wide band and the center frequency of the passband of the passing characteristic of the narrow band.

Claim (Index 1):
A radio receiver comprising:\n a first oscillator whose oscillation frequency is variable; a quadrature demodulator including a frequency mixer mixing a radio frequency signal and an oscillation signal outputted from the first oscillator and generating an intermediate frequency signal having an intermediate frequency lower than the frequency of the radio frequency signal; a band pass filter band-limiting the intermediate frequency signal by the passing characteristic selected from a plurality of passing characteristics; a filter control unit controlling the passing characteristic of the band pass filter; a filter information storage unit storing passing characteristic information including information representing the center frequency of the passband of each of the passing characteristics; a frequency control unit controlling the oscillation frequency so that the frequency of the intermediate frequency signal is a predetermined frequency; and a frequency correction unit referring to the passing characteristic information and correcting the oscillation frequency controlled by the frequency control unit, wherein in a state where the filter control unit controls the passing characteristic of the band pass filter to a first passing characteristic, the frequency control unit controls the oscillation frequency so that the frequency of the intermediate frequency signal is the predetermined frequency, wherein after the frequency control unit controls the oscillation frequency so that the frequency of the intermediate frequency signal is the predetermined frequency, the filter control unit controls the passing characteristic of the band pass filter from the first passing characteristic to a second passing characteristic having a passband width narrower than the passband width of the first passing characteristic, wherein when the passing characteristic of the band pass filter is changed from the first passing characteristic to the second passing characteristic, the frequency correction unit refers to the filter information storage unit, and corrects the oscillation frequency controlled by the frequency control unit by the amount according to the difference between the center frequency of the first passing characteristic and the center frequency of the second passing characteristic.

Metadata:
- Claim Count in Document: 23.0
- Percentile: 97.0
- Lexical Diversity: 3.10204
- Patent Class: 375.0
- Transitional Phrase Type: open
- Component Type: 1
- Foreign Priority: True
- Related Applications: ['12388015', '11916000', '14904168', '13404343', '10515726']

Analysis Scores:
- 35 USC 101 Eligibility (BERT): 0.5055650320019436
- 35 USC 102 Novelty (BERT): 0.4919883606364446
- Combined Prediction Score: 0.5042073648653937
- Mean Citation Score: 211.744734
- Max Citation Score: 247.51202
- Similarity Product: 193.35758295254945

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