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:
Mar. 20, 2012
Filed:
Mar. 20, 2007
Kiyoshi Tateishi, Hannou, JP;
Takanori Maeda, Kawagoe, JP;
Hideki Kobayashi, Kawagoe, JP;
Tomotaka Yabe, Tsurugashima, JP;
Kiyoshi Tateishi, Hannou, JP;
Takanori Maeda, Kawagoe, JP;
Hideki Kobayashi, Kawagoe, JP;
Tomotaka Yabe, Tsurugashima, JP;
Pioneer Corporation, Tokyo, JP;
Abstract
A physical properties detection device comprising a probe to be placed near or touching a surface of a ferroelectric; an oscillation loop including the probe and capacitance within the ferroelectric; and detection means for detecting a physical properties of the ferroelectric on the basis of a frequency variation of a measurement signal generated in the oscillation loop, the frequency variation accompanying application of an alternating electric field to the ferroelectric; and the physical properties detection device is further comprising frequency conversion means for converting the frequency of the measurement signal to a low frequency and outputting the resulting signal as a converted measurement signal; frequency control means for controlling the frequency of the converted measurement signal so as to match a target frequency; frequency detection means for generating a frequency detection signal that has a signal level corresponding to the frequency of the converted measurement signal; and synchronous detection means for synchronously detecting the frequency detection signal on the basis of a synchronization signal.