发明授权
US07881672B2 Tuner, digital demodulating apparatus, controlling method of the apparatus, computer program product for the apparatus, recording medium recording thereon the product, and digital receiver
失效
调谐器，数字解调装置，装置的控制方法，装置的计算机程序产品，在其上记录产品的记录介质和数字接收机
- 专利标题： Tuner, digital demodulating apparatus, controlling method of the apparatus, computer program product for the apparatus, recording medium recording thereon the product, and digital receiver
- 专利标题（中）： 调谐器，数字解调装置，装置的控制方法，装置的计算机程序产品，在其上记录产品的记录介质和数字接收机
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申请号： US11654579申请日： 2007-01-18
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公开(公告)号： US07881672B2公开(公告)日： 2011-02-01
- 发明人: Nobuyoshi Kaiki , Takae Sakai , Masayuki Natsumi , Kazumasa Kioi
- 申请人： Nobuyoshi Kaiki , Takae Sakai , Masayuki Natsumi , Kazumasa Kioi
- 申请人地址： JP Osaka-shi
- 专利权人： Sharp Kabushiki Kaisha
- 当前专利权人： Sharp Kabushiki Kaisha
- 当前专利权人地址： JP Osaka-shi
- 代理机构： Birch, Stewart, Kolasch & Birch, LLP
- 优先权： JP2006-148729 20060529; JP2006-246344 20060912
- 主分类号： H04B17/00
- IPC分类号： H04B17/00
摘要：
A digital demodulating apparatus comprises a tuner constituted by circuit elements to perform channel select processing to a signal; a demodulator that performs demodulation processing to a signal output from the tuner; a power supply unit that supplies a normal power to each circuit element, and supplies to the circuit element a test power different from the normal power, over a first time period in place of the normal power; a test noise measuring unit that measures the intensity of test noise contained in a signal to be output from the tuner, when the power supply unit supplies the test power over the first time period; a comparing unit that compares the intensity of the test noise measured by the test noise measuring unit with a noise reference value as a reference for updating of the normal power; and a power updating unit that updates the intensity of the normal power on the basis of a result of the comparison by the comparing unit.