JPS54161233A - Detection system for switching state of electrostatic capacity type switch - Google Patents

Detection system for switching state of electrostatic capacity type switch

Info

Publication number
JPS54161233A
JPS54161233A JP6761578A JP6761578A JPS54161233A JP S54161233 A JPS54161233 A JP S54161233A JP 6761578 A JP6761578 A JP 6761578A JP 6761578 A JP6761578 A JP 6761578A JP S54161233 A JPS54161233 A JP S54161233A
Authority
JP
Japan
Prior art keywords
switch
switching state
electrostatic capacity
capacity type
type switch
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
JP6761578A
Other languages
Japanese (ja)
Inventor
Tatsuro Konuma
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.)
Fujitsu Ltd
Original Assignee
Fujitsu 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 Fujitsu Ltd filed Critical Fujitsu Ltd
Priority to JP6761578A priority Critical patent/JPS54161233A/en
Publication of JPS54161233A publication Critical patent/JPS54161233A/en
Pending legal-status Critical Current

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  • Input From Keyboards Or The Like (AREA)

Abstract

PURPOSE: To prevent error detection by increasing tolerance to a noise by integrating a signal from a switch used for a switching state detection system twice.
CONSTITUTION: To electrostatic capacity type switch 6, two integrators 7 and 8 are connected in series and alternating signal A is applied to one electrode of switch 6 of the circuit; and the key of switch 6 is depressed to output differential wave B from the other electrode of switch 6 and this differential wave B is integrated by integrator 7 to output square wave E. This square wave E is integrated again by integrator 8 to output triangular wave F. Then, the output of electrostatic capacity type switch 6 detecting the switching state is integrated twice to increase tolerance to a noise, thereby preventing error detection.
COPYRIGHT: (C)1979,JPO&Japio
JP6761578A 1978-06-07 1978-06-07 Detection system for switching state of electrostatic capacity type switch Pending JPS54161233A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP6761578A JPS54161233A (en) 1978-06-07 1978-06-07 Detection system for switching state of electrostatic capacity type switch

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP6761578A JPS54161233A (en) 1978-06-07 1978-06-07 Detection system for switching state of electrostatic capacity type switch

Publications (1)

Publication Number Publication Date
JPS54161233A true JPS54161233A (en) 1979-12-20

Family

ID=13350032

Family Applications (1)

Application Number Title Priority Date Filing Date
JP6761578A Pending JPS54161233A (en) 1978-06-07 1978-06-07 Detection system for switching state of electrostatic capacity type switch

Country Status (1)

Country Link
JP (1) JPS54161233A (en)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS49114830A (en) * 1973-02-28 1974-11-01
JPS5150528A (en) * 1974-10-29 1976-05-04 Tokyo Shibaura Electric Co
JPS52123132A (en) * 1976-04-06 1977-10-17 Burroughs Corp Method of altering transmission signal amplitude in keyboard
JPS534831B2 (en) * 1974-03-06 1978-02-21

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS49114830A (en) * 1973-02-28 1974-11-01
JPS534831B2 (en) * 1974-03-06 1978-02-21
JPS5150528A (en) * 1974-10-29 1976-05-04 Tokyo Shibaura Electric Co
JPS52123132A (en) * 1976-04-06 1977-10-17 Burroughs Corp Method of altering transmission signal amplitude in keyboard

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