The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jun. 09, 2009
Filed:
Dec. 14, 2005
Tadahiro Kuroda, Yokohama, JP;
Daisuke Mizoguchi, Yokohama, JP;
Noriyuki Miura, Yokohama, JP;
Keio University, Tokyo, JP;
Abstract
An electronic circuit capable of carrying out communications by inductive coupling with minimum power consumption between substrates. Although the amplification factor of the amplifieris 1, the amplification factors of the amplifiersthroughare, respectively, 2, 4 and 8. Amplification is carried out at the amplification factorsthrough(=1+2+4+8) as a whole by a combination thereof. The transmit power control registeroutputs ON and OFF signals to the respective amplifiersthroughso as to bring about transmit power responsive to the distance to a substrate having a receiver coil which is a destination of transmission (that is, the distance between a transmitter coil and a receiver coil), in further detail, so as to have an amplification factor by which transmit power proportionate to the distance can be obtained, and selects a combination of the amplifiersthrough