TW200643451A - A structure of object proximity and position detector - Google Patents

A structure of object proximity and position detector

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Publication number
TW200643451A
TW200643451A TW094118758A TW94118758A TW200643451A TW 200643451 A TW200643451 A TW 200643451A TW 094118758 A TW094118758 A TW 094118758A TW 94118758 A TW94118758 A TW 94118758A TW 200643451 A TW200643451 A TW 200643451A
Authority
TW
Taiwan
Prior art keywords
oscillator
sensor plates
position detector
proximity
sensitivity
Prior art date
Application number
TW094118758A
Other languages
Chinese (zh)
Other versions
TWI259908B (en
Inventor
Shyuh-Der Lin
Original Assignee
Holylite Microelectronics Corp
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 Holylite Microelectronics Corp filed Critical Holylite Microelectronics Corp
Priority to TW94118758A priority Critical patent/TWI259908B/en
Application granted granted Critical
Publication of TWI259908B publication Critical patent/TWI259908B/en
Publication of TW200643451A publication Critical patent/TW200643451A/en

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Abstract

The present invention offers an object proximity detector and an object position detector. The variation of frequency of an oscillator is used to detect the proximity of an object to the sensor plates. The dependence of frequency on process parameter is minimized by a compensation capacitor. It is not need to calibrate the product during the manufacture. In order to magnify the sensitivity, the sensor plates are placed in the feedback loop of the oscillator, instead of at the input of the oscillator. The independence of the process parameter and increasing of the sensitivity can be achieved by adding the compensation capacitor and place the sensor plates in the feedback loop at the same time. Multiple transmission gates are connected to the input and the output of the oscillator, and the sensor plates are connected to the transmission gates to form an object position detector.
TW94118758A 2005-06-07 2005-06-07 A structure of object proximity and position detector TWI259908B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
TW94118758A TWI259908B (en) 2005-06-07 2005-06-07 A structure of object proximity and position detector

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
TW94118758A TWI259908B (en) 2005-06-07 2005-06-07 A structure of object proximity and position detector

Publications (2)

Publication Number Publication Date
TWI259908B TWI259908B (en) 2006-08-11
TW200643451A true TW200643451A (en) 2006-12-16

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ID=37872575

Family Applications (1)

Application Number Title Priority Date Filing Date
TW94118758A TWI259908B (en) 2005-06-07 2005-06-07 A structure of object proximity and position detector

Country Status (1)

Country Link
TW (1) TWI259908B (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
TWI407116B (en) * 2010-04-16 2013-09-01 Nat Univ Kaohsiung Piezoelectric crystal proximity sensor

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
TWI407116B (en) * 2010-04-16 2013-09-01 Nat Univ Kaohsiung Piezoelectric crystal proximity sensor

Also Published As

Publication number Publication date
TWI259908B (en) 2006-08-11

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