GB1236535A - Gate circuit for electronic musical instruments - Google Patents

Gate circuit for electronic musical instruments

Info

Publication number
GB1236535A
GB1236535A GB4442/70A GB444270A GB1236535A GB 1236535 A GB1236535 A GB 1236535A GB 4442/70 A GB4442/70 A GB 4442/70A GB 444270 A GB444270 A GB 444270A GB 1236535 A GB1236535 A GB 1236535A
Authority
GB
United Kingdom
Prior art keywords
gating
capacitor
electronic musical
musical instruments
constant current
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.)
Expired
Application number
GB4442/70A
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.)
Hitachi Ltd
Original Assignee
Hitachi 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 Hitachi Ltd filed Critical Hitachi Ltd
Publication of GB1236535A publication Critical patent/GB1236535A/en
Expired legal-status Critical Current

Links

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
    • G10H1/02—Means for controlling the tone frequencies, e.g. attack or decay; Means for producing special musical effects, e.g. vibratos or glissandos
    • G10H1/04—Means for controlling the tone frequencies, e.g. attack or decay; Means for producing special musical effects, e.g. vibratos or glissandos by additional modulation
    • G10H1/053—Means for controlling the tone frequencies, e.g. attack or decay; Means for producing special musical effects, e.g. vibratos or glissandos by additional modulation during execution only
    • G10H1/057—Means for controlling the tone frequencies, e.g. attack or decay; Means for producing special musical effects, e.g. vibratos or glissandos by additional modulation during execution only by envelope-forming circuits

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Multimedia (AREA)
  • Electronic Switches (AREA)
  • Electrophonic Musical Instruments (AREA)

Abstract

1,236,535. Electrophonic musical instruments. HITACHI Ltd. 29 Jan., 1970 [5 Feb., 1969], No. 4442/70. Heading G5J. [Also in Division H3] A gating circuit adapted to provide a desired rise or fall slope in the output signal, for example for an electronic musical instrument, comprises two active elements Q1A, Q1B having the input signal applied to one at 1A, the output signal derived from the other at 3 and a common electrode connected to an active gating element Q3A to which the gating signal is applied through an envelope forming circuit. As shown, the two active elements Q1A, Q2A constitute a differential amplifier and the gating element constitutes a controllable constant current common emitter supply. When the key S is made the capacitor C2 charges to switch on the constant current at a desired rate. When the switch is opened the capacitor discharges through R6 at a rate which is controlled by the mark-to-space ratio of high frequency pulses applied to the base of Q4. A single capacitor circuit may serve for a plurality of gates (Fig. 2, not shown).
GB4442/70A 1969-02-05 1970-01-29 Gate circuit for electronic musical instruments Expired GB1236535A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP44008148A JPS4919213B1 (en) 1969-02-05 1969-02-05

Publications (1)

Publication Number Publication Date
GB1236535A true GB1236535A (en) 1971-06-23

Family

ID=11685210

Family Applications (1)

Application Number Title Priority Date Filing Date
GB4442/70A Expired GB1236535A (en) 1969-02-05 1970-01-29 Gate circuit for electronic musical instruments

Country Status (5)

Country Link
US (1) US3656008A (en)
JP (1) JPS4919213B1 (en)
DE (1) DE2004835C3 (en)
FR (1) FR2033851A5 (en)
GB (1) GB1236535A (en)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4173916A (en) * 1974-10-18 1979-11-13 Matsushita Electric Industrial Co., Ltd. Tone generator system for an electronic organ
JPS5533747Y2 (en) * 1975-04-14 1980-08-11
US3999149A (en) * 1975-06-20 1976-12-21 D. H. Baldwin Company Modulation system
JPS5279060U (en) * 1975-12-11 1977-06-13
DE2917352C2 (en) * 1979-04-28 1983-12-29 Dr. Rainer Böhm GmbH & Co KG, 4950 Minden Electronic organ

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2233317A (en) * 1937-05-25 1941-02-25 Philco Radio & Television Corp Amplifier for television system
US3078395A (en) * 1960-04-04 1963-02-19 Rca Corp Bidirectional load current switching circuit
US3288907A (en) * 1962-05-07 1966-11-29 Hammond Organ Co Electronic musical instrument with delayed vibrato
US3284713A (en) * 1963-03-26 1966-11-08 Motorola Inc Emitter coupled high frequency amplifier
US3429976A (en) * 1966-05-11 1969-02-25 Electro Voice Electrical woodwind musical instrument having electronically produced sounds for accompaniment

Also Published As

Publication number Publication date
DE2004835A1 (en) 1970-08-20
US3656008A (en) 1972-04-11
JPS4919213B1 (en) 1974-05-16
DE2004835B2 (en) 1973-10-31
DE2004835C3 (en) 1974-06-20
FR2033851A5 (en) 1970-12-04

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