JPS5744813A - Signal level detecting circuit - Google Patents

Signal level detecting circuit

Info

Publication number
JPS5744813A
JPS5744813A JP55120285A JP12028580A JPS5744813A JP S5744813 A JPS5744813 A JP S5744813A JP 55120285 A JP55120285 A JP 55120285A JP 12028580 A JP12028580 A JP 12028580A JP S5744813 A JPS5744813 A JP S5744813A
Authority
JP
Japan
Prior art keywords
voltage
signal
capacitor
slice level
diode
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
JP55120285A
Other languages
Japanese (ja)
Inventor
Yukio Fuchinabe
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 JP55120285A priority Critical patent/JPS5744813A/en
Publication of JPS5744813A publication Critical patent/JPS5744813A/en
Pending legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
    • G01D5/00—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable
    • G01D5/12—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means
    • G01D5/244—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means influencing characteristics of pulses or pulse trains; generating pulses or pulse trains
    • G01D5/245—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means influencing characteristics of pulses or pulse trains; generating pulses or pulse trains using a variable number of pulses in a train
    • G01D5/2454—Encoders incorporating incremental and absolute signals
    • G01D5/2455—Encoders incorporating incremental and absolute signals with incremental and absolute tracks on the same encoder
    • G01D5/2457—Incremental encoders having reference marks

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Transmission And Conversion Of Sensor Element Output (AREA)
  • Manipulation Of Pulses (AREA)

Abstract

PURPOSE:To completely isolate a slice level voltage from the effect of the variation of input signal level by obtaining the slice level voltage through passing the input signals via a diode. CONSTITUTION:When a first peak signal Vp1 among input signals V1 is applied to the input terminal (-) of a comparator 6, the signal Vp1 is sent to a capacitor C through a diode D. Then, a slice level Vs which is smaller than the signal Vp1 by the voltage drop in the diode D is applied to the capacitor C and at the same time, the slice level Vs is applied also to the terminal (+) of the comparator 6. A second peak voltage Vp2 which is applied successively is smaller than the voltage Vs, therefore, the voltage Vs charged to the capacitor C is discharged gradually through a resistor R. Accordingly, the voltage Vs will not be smaller than the signal Vp2 when the time constant CR of the capacitor C and the resistor R is sufficiently large even if the signal Vp1 becomes lower than the level Vs.
JP55120285A 1980-08-31 1980-08-31 Signal level detecting circuit Pending JPS5744813A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP55120285A JPS5744813A (en) 1980-08-31 1980-08-31 Signal level detecting circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP55120285A JPS5744813A (en) 1980-08-31 1980-08-31 Signal level detecting circuit

Publications (1)

Publication Number Publication Date
JPS5744813A true JPS5744813A (en) 1982-03-13

Family

ID=14782452

Family Applications (1)

Application Number Title Priority Date Filing Date
JP55120285A Pending JPS5744813A (en) 1980-08-31 1980-08-31 Signal level detecting circuit

Country Status (1)

Country Link
JP (1) JPS5744813A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0871013A2 (en) * 1997-04-09 1998-10-14 Hewlett-Packard Company Position encoder

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0871013A2 (en) * 1997-04-09 1998-10-14 Hewlett-Packard Company Position encoder
EP0871013A3 (en) * 1997-04-09 2000-07-12 Hewlett-Packard Company Position encoder

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