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• 15 United States
• 10 France
• 8 Japan
• 7 China
• 5 Korea
• 2 Other

Patent Owner(s)

Patent Owner	Address
NATIONAL UNIVERSITY CORPORATION	KUMAMOTO UNIVERSITY 39-1 KUROKAMI 2-CHOME KUMAMOTO-SHI KUMAMOTO 860-8555

International Classification(s)

• H03K:PULSE TECHNIQUE

Inventor(s)

Inventor Name	Address	# of filed Patents	Total Citations
Yoneya, Akihiko	Toyota, JP	6	38
# of filed Patents : 6 Total Citations : 38

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• 0 % this patent is cited more than
• 13 Age

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Maintenance Fees

Fee	Large entity fee	small entity fee	micro entity fee	due date

Fee	Large entity fee	small entity fee	micro entity fee
Surcharge after expiration - Late payment is unavoidable	$700.00	$350.00	$175.00
Surcharge after expiration - Late payment is unintentional	$1,640.00	$820.00	$410.00

DATE PUBLISHED	PUBLICATION/PATENT NO.	PUBLICATION TYPE
February 14, 2012	US,8116368,B2   US8116368B2	GRANTED PATENT AS SECOND PUBLICATION
July 30, 2009	US,20090190651,A1   US20090190651A1	FIRST PUBLISHED PATENT APPLICATION

Full Text

US Patent No: 8116368

PWM signal generator, PWM signal generating device, and digital amplifier

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Abstract

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In a full digital amplifier for an audio amplifier or the like, it is possible to suppress the concentration of an electromagnetic noise emission spectrum at a specific frequency. A sampling period variation type digital filter is realized by varying the coefficient of a noise shaping filter for the delta-sigma modulator of the full digital amplifier depending on a sampling period. This allows the variation in the carrier frequency of the pulse width modulation.

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Description

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Legal Events

 

• STCH2016
• FP2016
• LAPS2016
• REMI2015
• I2012
• P2009
• AS2009
• F2006
• PD2006

Date	Code	Event	Description
Mar 14, 2016	STCH	INFORMATION ON STATUS: PATENT DISCONTINUATION	free format text: PATENT EXPIRED DUE TO NONPAYMENT OF MAINTENANCE FEES UNDER 37 CFR 1.362
Feb 14, 2016	FP	LAPSED DUE TO FAILURE TO PAY MAINTENANCE FEE	Effective Date: Feb 14, 2016
Feb 14, 2016	LAPS	LAPSE FOR FAILURE TO PAY MAINTENANCE FEES
Sep 25, 2015	REMI	MAINTENANCE FEE REMINDER MAILED
Feb 14, 2012	I	Issuance
Jul 30, 2009	P	Published
Jan 05, 2009	AS	ASSIGNMENT	free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:YONEYA, AKIHIKO;REEL/FRAME:022198/0241 Owner name: NATIONAL UNIVERSITY CORPORATION, JAPAN Effective Date: Jan 05, 2009
Jul 27, 2006	F	Filing
Jul 27, 2006	PD	Priority Date