EP0063686A1 - Dispositif de commutation comprenant un ensemble d'interrupteurs à touches - Google Patents

Dispositif de commutation comprenant un ensemble d'interrupteurs à touches Download PDF

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Publication number
EP0063686A1
EP0063686A1 EP82101939A EP82101939A EP0063686A1 EP 0063686 A1 EP0063686 A1 EP 0063686A1 EP 82101939 A EP82101939 A EP 82101939A EP 82101939 A EP82101939 A EP 82101939A EP 0063686 A1 EP0063686 A1 EP 0063686A1
Authority
EP
European Patent Office
Prior art keywords
switch
shift register
control unit
data
switches
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.)
Granted
Application number
EP82101939A
Other languages
German (de)
English (en)
Other versions
EP0063686B1 (fr
Inventor
Christian Deforeit
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.)
Matth Hohner AG
Original Assignee
Matth Hohner AG
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 Matth Hohner AG filed Critical Matth Hohner AG
Publication of EP0063686A1 publication Critical patent/EP0063686A1/fr
Application granted granted Critical
Publication of EP0063686B1 publication Critical patent/EP0063686B1/fr
Expired legal-status Critical Current

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Classifications

    • G—PHYSICS
    • G10—MUSICAL INSTRUMENTS; ACOUSTICS
    • G10H—ELECTROPHONIC MUSICAL INSTRUMENTS; INSTRUMENTS IN WHICH THE TONES ARE GENERATED BY ELECTROMECHANICAL MEANS OR ELECTRONIC GENERATORS, OR IN WHICH THE TONES ARE SYNTHESISED FROM A DATA STORE
    • G10H1/00—Details of electrophonic musical instruments
    • G10H1/18—Selecting circuits
    • G10H1/182—Key multiplexing
    • G—PHYSICS
    • G10—MUSICAL INSTRUMENTS; ACOUSTICS
    • G10H—ELECTROPHONIC MUSICAL INSTRUMENTS; INSTRUMENTS IN WHICH THE TONES ARE GENERATED BY ELECTROMECHANICAL MEANS OR ELECTRONIC GENERATORS, OR IN WHICH THE TONES ARE SYNTHESISED FROM A DATA STORE
    • G10H1/00—Details of electrophonic musical instruments
    • G10H1/18—Selecting circuits
    • G10H1/22—Selecting circuits for suppressing tones; Preference networks

Definitions

  • the invention relates to a circuit arrangement with a pushbutton switch block.
  • a pushbutton switch block is to be understood as a group of switches (at least two) whose contact is closed only during actuation (tapping), the switches being functionally linked so that only the last actuated one "applies", but the others then become “invalid". The switches are therefore not interlocked mechanically, but electrically.
  • a control lamp is assigned to each switch so that the user can recognize which switch is assumed to be actuated.
  • Such key switch blocks are found, for example, in electronic musical instruments; Using the switches, for example, the timbre of the tones is changed in order to simulate different conventional musical instruments.
  • the object of the invention is to provide a circuit arrangement with the features specified in the preamble of claim 1, in which the switch can be queried with a minimum of effort, in particular with regard to the wiring and with extensive use of the existing components.
  • the control unit 10 serially delivers input data via line 12 to a shift register 14. After the shift register has been clocked through once, the binary data are on the read outputs 16.1, 16.2, ... 16.n of the shift register 14. It is assumed that one was actuated last Switches 18.1, 18.2, ..., 18.n are assigned a level "0" on the assigned output line 16; the outputs 16 are associated with the switch, for. B. in his button arranged lamp 20.1, 20.2, ..., 20.n connected. Since the other terminals of the lamps 20 are together on a rail 22 carrying a high level "V", the lamp in question lights up.
  • the switches 18 are equipped with work contacts. One terminal is connected to the assigned output 16 of the shift register 14, while the other terminal is briefly connected to a signaling line 24 when the switch is actuated by tapping it. The signaling 24 is also in the switch actuation pauses via a series resistor 26 at the high level V.
  • the control unit 10 In order to determine whether a switch is tapped, and which one is, the control unit 10 deletes the contents of the shift register 14 at certain time intervals via the erase line 28, so that the level 0 is simultaneously at all outputs 16. X is closed at this time any of the switches 18, the level "O" appears on the Signalisierleitun 24 g accordingly. The control unit then begins to drive high level bits through the To shift register, the shift is provided by the clock on line 30, and until the next cycle the same output line 16 X is queried again.
  • V-Pe q el Via the switch, which is still closed, a V-Pe q el then reaches signaling line 24, and the number of high-level bits that have been generated by the control unit since the start of the shift cycle identifies the position of the switch 18 X in question in the serial data sequence Output of the shift register.
  • zeros can also be given by the control unit 10 for a shift cycle over the serial data input, until, as before, the zero level is switched through the switch 18 X on the signaling line. This reduces the number of lines from four to three, but increases the effort in the control unit due to the larger number of data to be processed.
  • the content of the shift register is deleted with each interrogation process and is rebuilt. Of course, this is undesirable if the switches 18 are operated relatively rarely.
  • the content of the shift register during the interrogation cycle can initially remain undeleted by unlocking the interrogation pulse from the erase line 28 '- as shown in FIG. 2 - AND gate 32.1, 32.2, ..., 32.n, which are placed between output lines 16.1, 16.2, ..., 16.n and switches 18.1, 18.2, ..., 18.n.
  • the number of switches 18 with indicator lights 20 are not limited to the four or three shown.
  • the shift register 14 is commercially available; are more If there is a switch than the storage capacity of the shift register, additional shift registers can be added.
  • the query pulse on the erase line 28 need only be generated approximately every 100 ms in the above-mentioned application, for the duration of a sequence.
  • switch interrogation pulse briefly replaces all lamps 20 under operating voltage, but that the pulse duty factor is far too low to make the lamps light up, of course with the exception of the lamp which is intended to indicate the typed switch anyway.
  • circuit arrangement described makes additional flip-flops superfluous, the mechanical switches usually being connected downstream because of any contact bouncing.

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  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Multimedia (AREA)
  • Input From Keyboards Or The Like (AREA)
  • Control Of Indicators Other Than Cathode Ray Tubes (AREA)
  • Electrophonic Musical Instruments (AREA)
  • Electronic Switches (AREA)
  • Keying Circuit Devices (AREA)
EP82101939A 1981-04-29 1982-03-11 Dispositif de commutation comprenant un ensemble d'interrupteurs à touches Expired EP0063686B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3116941 1981-04-29
DE19813116941 DE3116941A1 (de) 1981-04-29 1981-04-29 "schaltungsanordnung mit einem tastschalterblock"

Publications (2)

Publication Number Publication Date
EP0063686A1 true EP0063686A1 (fr) 1982-11-03
EP0063686B1 EP0063686B1 (fr) 1984-09-05

Family

ID=6131047

Family Applications (1)

Application Number Title Priority Date Filing Date
EP82101939A Expired EP0063686B1 (fr) 1981-04-29 1982-03-11 Dispositif de commutation comprenant un ensemble d'interrupteurs à touches

Country Status (4)

Country Link
US (1) US4484180A (fr)
EP (1) EP0063686B1 (fr)
JP (1) JPS57189195A (fr)
DE (2) DE3116941A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3241492A1 (de) * 1982-11-10 1984-05-24 Dr. Rainer Böhm GmbH & Co KG, 4950 Minden Schaltungsanordnung zur steuerung und ueberpruefung der schaltzustaende von elektronischen schaltern einer mehrzahl von schaltergruppen

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4727357A (en) * 1984-06-08 1988-02-23 Amtel Communications, Inc. Compact keyboard system
US4691143A (en) * 1986-09-05 1987-09-01 Aero-Metric General, Inc. Circuit status indicating device with improved switch on/off detection capability
DE3632741A1 (de) * 1986-09-26 1988-03-31 Stahl R Schaltgeraete Gmbh Explosionsgeschuetzte anzeigeeinrichtung
DE3941319A1 (de) * 1989-12-14 1991-06-27 Sick Optik Elektronik Erwin Verfahren zur schalterueberwachung
EP0483829A3 (en) * 1990-10-31 1992-12-23 Oki Electric Industry Co., Ltd. Control circuit for operating panel
US5280742A (en) * 1991-10-28 1994-01-25 Vergara Florentino S Musical drum with lighting effects
US5451879A (en) * 1992-08-14 1995-09-19 Moore; Clayton K. Electromechanical relay monitoring system with status clocking
US6791479B2 (en) 2001-03-30 2004-09-14 Visteon Global Technologies, Inc. System for logic state detection

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3765015A (en) * 1971-09-20 1973-10-09 Data General Corp Switch monitoring circuitry
US3950743A (en) * 1973-04-03 1976-04-13 Omron Tateisi Electronics Co., Ltd. Keying input apparatus having a reduced number of output terminals
US4179969A (en) * 1977-09-12 1979-12-25 Sony Corporation Tone generator for electrical music instrument
US4193038A (en) * 1977-04-11 1980-03-11 Casio Computer Co., Ltd. Key input apparatus

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5086929A (fr) * 1973-11-30 1975-07-12
JPS5818180Y2 (ja) * 1975-09-27 1983-04-13 シャープ株式会社 ニユウリヨクソウチ

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3765015A (en) * 1971-09-20 1973-10-09 Data General Corp Switch monitoring circuitry
US3950743A (en) * 1973-04-03 1976-04-13 Omron Tateisi Electronics Co., Ltd. Keying input apparatus having a reduced number of output terminals
US4193038A (en) * 1977-04-11 1980-03-11 Casio Computer Co., Ltd. Key input apparatus
US4179969A (en) * 1977-09-12 1979-12-25 Sony Corporation Tone generator for electrical music instrument

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3241492A1 (de) * 1982-11-10 1984-05-24 Dr. Rainer Böhm GmbH & Co KG, 4950 Minden Schaltungsanordnung zur steuerung und ueberpruefung der schaltzustaende von elektronischen schaltern einer mehrzahl von schaltergruppen

Also Published As

Publication number Publication date
DE3260644D1 (en) 1984-10-11
JPS57189195A (en) 1982-11-20
EP0063686B1 (fr) 1984-09-05
DE3116941A1 (de) 1982-11-25
US4484180A (en) 1984-11-20

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