Amplifiers – Miscellaneous – Amplifier protection means
Reexamination Certificate
2008-12-23
2011-11-08
Choe, Henry K (Department: 2817)
Amplifiers
Miscellaneous
Amplifier protection means
C330S298000
Reexamination Certificate
active
08054129
ABSTRACT:
A class D amplifier includes: an amplifier that generates a digital signal for driving a load based on an input signal; an attenuator that attenuates the input signal according to an attenuation command signal; and a clip prevention controller that outputs the attenuation command signal to intermittently attenuate the input signal when the digital signal is brought into a clip state or a near-clip state.
REFERENCES:
patent: 3620631 (1971-11-01), Stopka et al.
patent: 4173739 (1979-11-01), Yoshida
patent: 4376267 (1983-03-01), Chu et al.
patent: 4600891 (1986-07-01), Taylor, Jr. et al.
patent: 4724396 (1988-02-01), Taylor, Jr. et al.
patent: RE33333 (1990-09-01), Taylor, Jr. et al.
patent: 5767740 (1998-06-01), Fogg
patent: 6118336 (2000-09-01), Pullen et al.
patent: 6122331 (2000-09-01), Dumas
patent: 7167046 (2007-01-01), Maejima
patent: 7183840 (2007-02-01), Maejima
patent: 7579910 (2009-08-01), Zhang et al.
patent: 7656202 (2010-02-01), Kaiho et al.
patent: 7728666 (2010-06-01), Zhang et al.
patent: 2004/0184621 (2004-09-01), Andersen et al.
patent: 1179032 (1998-04-01), None
patent: 1003280 (2002-05-01), None
patent: SHO-60-11518 (1985-01-01), None
patent: 4-172705 (1992-06-01), None
patent: 4172705 (1992-06-01), None
patent: 10-256839 (1998-09-01), None
patent: 2003-332867 (2003-11-01), None
patent: A-2005-123949 (2005-05-01), None
European Patent Office, “European Search Report,” dated Dec. 6, 2006.
Japanese Patent Office, “Notification of Reasons for Refusal”, Patent Application No. 2006-226269, Drafting Date: Mar. 18, 2010, six pages.
Japan Patent Office “Notification of Reasons for Refusal” of Patent Application No. 2006-226272, dated Nov. 24, 2010, 2 pages.
Chinese Patent Office “Request for Invalidation of a Patent” of Patent No. ZL200610141503.6, dated Nov. 29, 2010, 23 pages.
The State Intellectual Property Office of the People's Republic of China, “Notification of First Office Action” Chinese Patent Application No. 201010147571.X dated Feb. 25, 2011, 7 pages.
The State Intellectual Property Office of the People's Republic of China, “Notification of First Office Action” Chinese Patent Application No. 201010147558.4 dated Feb. 25, 2011, 7 pages.
The State Intellectual Property Office of the People's Republic of China, “Notification of First Office Action” Chinese Patent Application No. 201010147574.3 dated Feb. 25, 2011, 5 pages.
The State Intellectual Property Office of the People's Republic of China, “Observation for Reexamination or Invalidation of Patent” Chinese Patent No. ZL200610141503.6 dated Feb. 25, 2011, 21 pages.
Japanese Patent Office “Notification of Reasons for Refusal”°of Patent No. 2010-099207, dated Jul. 26, 2011, 2 pages.
Japanese Patent Office “Utility Model Publication SHO-60-11518” Date of Publication of Application: Jan. 26, 1995, Utility Model Application Serial No. SHO-58-103656, Applicant: Nippon Gakki Co., Ltd., 2 pages.
Choe Henry K
Pillsbury Winthrop Shaw & Pittman LLP
Yamaha Corporation
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