Title:
半導体装置
Document Type and Number:
Japanese Patent JP5144313
Kind Code:
B2
Abstract:
In a semiconductor device which can perform data communication through wireless communication, to suppress transmission and the like of an AC signal, the semiconductor device includes an input circuit to which a radio signal is input, a first circuit, which generates a constant voltage, such as a constant voltage circuit or a limiter circuit, a second circuit to which the generated constant voltage is input and which can change impedance of the semiconductor device, and a filter provided between the first circuit and the second circuit. Transmission of an AC signal is suppressed by the filter, and malfunctions or operation defects such as complete inoperative due to variation in the constant voltage is prevented.
Inventors:
Yutaka Shionoiri
Application Number:
JP2008060358A
Publication Date:
February 13, 2013
Filing Date:
March 11, 2008
Export Citation:
Assignee:
Semiconductor Energy Laboratory Co., Ltd.
International Classes:
G06K19/077; G06K19/07; H01L21/822; H01L27/04; H04B5/02
Foreign References:
| WO2002007173A1 |