JPS6460110A - Code identifying circuit - Google Patents

Code identifying circuit

Info

Publication number
JPS6460110A
JPS6460110A JP21670687A JP21670687A JPS6460110A JP S6460110 A JPS6460110 A JP S6460110A JP 21670687 A JP21670687 A JP 21670687A JP 21670687 A JP21670687 A JP 21670687A JP S6460110 A JPS6460110 A JP S6460110A
Authority
JP
Japan
Prior art keywords
digital signal
level
average value
fluctuation
code identification
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP21670687A
Other languages
Japanese (ja)
Inventor
Masahito Ejiri
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Toshiba Corp
Toshiba AVE Co Ltd
Original Assignee
Toshiba Corp
Toshiba Audio Video Engineering Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Toshiba Corp, Toshiba Audio Video Engineering Co Ltd filed Critical Toshiba Corp
Priority to JP21670687A priority Critical patent/JPS6460110A/en
Publication of JPS6460110A publication Critical patent/JPS6460110A/en
Pending legal-status Critical Current

Links

Abstract

PURPOSE:To attain exact code identification by converting an input signal for the code identification to a digital signal, calculating an average value between the average value of one polarity level of this digital signal and the average value of the other polarity level and level-comparing the average value with the digital signal. CONSTITUTION:The input signal for the code identification is converted to the digital signal and a digital signal processing is executed. Namely, when an off-set is generated to the digital signal outputted from an A/D converting circuit 25, the level fluctuation of the digital signal outputted from FF circuits 33 and 34 is respectively suppressed to the 1/2 fluctuation of the off-set fluctuation of the digital signal. Thus, an identifying level fluctuation, which is the average value of the output level of the respective FF circuits 33 and 34, is suppressed to the 1/2 or 1/4 of the off-set fluctuation of the digital signal and an identifying level can be held to the almost central level of the amplitude of the digital signal. Thus, the exact code identification can be executed.
JP21670687A 1987-08-31 1987-08-31 Code identifying circuit Pending JPS6460110A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP21670687A JPS6460110A (en) 1987-08-31 1987-08-31 Code identifying circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP21670687A JPS6460110A (en) 1987-08-31 1987-08-31 Code identifying circuit

Publications (1)

Publication Number Publication Date
JPS6460110A true JPS6460110A (en) 1989-03-07

Family

ID=16692644

Family Applications (1)

Application Number Title Priority Date Filing Date
JP21670687A Pending JPS6460110A (en) 1987-08-31 1987-08-31 Code identifying circuit

Country Status (1)

Country Link
JP (1) JPS6460110A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2003061004A2 (en) * 2002-01-17 2003-07-24 Infineon Technologies Ag Method for coding and authenticating semiconductor circuits
JP2006217102A (en) * 2005-02-02 2006-08-17 Fujitsu Ltd Dc offset correction circuit for a-d converter

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2003061004A2 (en) * 2002-01-17 2003-07-24 Infineon Technologies Ag Method for coding and authenticating semiconductor circuits
WO2003061004A3 (en) * 2002-01-17 2004-07-29 Infineon Technologies Ag Method for coding and authenticating semiconductor circuits
JP2006217102A (en) * 2005-02-02 2006-08-17 Fujitsu Ltd Dc offset correction circuit for a-d converter

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