JPH0283597U - - Google Patents
Info
- Publication number
- JPH0283597U JPH0283597U JP16250488U JP16250488U JPH0283597U JP H0283597 U JPH0283597 U JP H0283597U JP 16250488 U JP16250488 U JP 16250488U JP 16250488 U JP16250488 U JP 16250488U JP H0283597 U JPH0283597 U JP H0283597U
- Authority
- JP
- Japan
- Prior art keywords
- rectangular wave
- wavelength
- pitch
- duty ratio
- information output
- 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
Links
- 238000010586 diagram Methods 0.000 description 4
- 238000000034 method Methods 0.000 description 1
Description
図面はこの考案の一実施例を示すものであつて
、第１図はこの考案の実施例に係る電子楽器の全
体回路構成図、第２図は第１図における矩形波発
生装置４の具体的回路構成図、第３図は矩形波発
生装置４から発生される矩形波のデユーテイ比を
説明するための説明図、第４図は第１図における
ＣＰＵ１の基準Ｈｉｇｈ区間データ設定処理の動
作を説明するためのフローチヤート図である。
１……ＣＰＵ、３―１……音高情報発生部、３
―２……鍵盤、３―４……基準Ｈｉｇｈ区間設定
スイツチ、４……矩形波発生装置、４―１……基
準Ｈｉｇｈ区間レジスタ、４―２，４―６，４―
９……コンパレータ、４―３……セレクタ、４―
４……波形情報レジスタ、４―５……１／２演算
回路、４―７……Ｈｉｇｈ区間レジスタ、４―８
……カウンタ、４―１０……フリツプフロツプ回
路。
The drawings show one embodiment of this invention, in which FIG. 1 is a diagram of the overall circuit configuration of an electronic musical instrument according to an embodiment of this invention, and FIG. 2 is a specific diagram of the square wave generator 4 in FIG. 1. A circuit configuration diagram, FIG. 3 is an explanatory diagram for explaining the duty ratio of the rectangular wave generated from the rectangular wave generator 4, and FIG. 4 is an explanation of the operation of the reference High section data setting process of the CPU 1 in FIG. 1. FIG. 1...CPU, 3-1...Pitch information generation section, 3
-2...Keyboard, 3-4...Reference High section setting switch, 4...Square wave generator, 4-1...Reference High section register, 4-2, 4-6, 4-
9... Comparator, 4-3... Selector, 4-
4...Waveform information register, 4-5...1/2 arithmetic circuit, 4-7...High interval register, 4-8
...Counter, 4-10...Flip-flop circuit.
Claims (1)
する矩形波発生装置において、 矩形波のＨｉｇｈ区間又はＬｏｗ区間の長さを
表わす区間長情報を記憶する区間長情報記憶手段
と、 音高を指定する音高指定手段と、 この音高指定手段により指定された音高に対応
する周期の矩形波の波長を表わす第１の波長情報
を出力する第１の波長情報出力手段と、 この第１の波長情報出力手段により出力される
第１の波長情報に所定の演算を施すことにより第
２の波長情報を出力する第２の波長情報出力手段
と、 この第２の波長情報出力手段により出力される
第２の波長情報と上記区間長情報記憶手段に記憶
される区間長情報とを比較する比較手段と、 この比較手段による比較結果に基づいて発生さ
せるべき矩形波のデユーテイ比を決定するデユー
テイ比決定手段と、 このデユーテイ比決定手段により決定されたデ
ユーテイ比を有する矩形波を発生させる矩形波発
生手段と、 を具備したことを特徴とする矩形波発生装置。[Claims for Utility Model Registration] In a rectangular wave generator that generates a rectangular wave with a period corresponding to a specified pitch, an interval length that stores interval length information representing the length of a High interval or a Low interval of a rectangular wave. an information storage means, a pitch specifying means for specifying a pitch, and a first wavelength for outputting first wavelength information representing a wavelength of a rectangular wave having a period corresponding to the pitch specified by the pitch specifying means. information output means; a second wavelength information output means for outputting second wavelength information by performing a predetermined calculation on the first wavelength information output by the first wavelength information output means; a comparison means for comparing the second wavelength information outputted by the wavelength information output means and the section length information stored in the section length information storage means; and a rectangular wave to be generated based on the comparison result by the comparison means. A rectangular wave generating device comprising: a duty ratio determining means for determining a duty ratio of; and a rectangular wave generating means for generating a rectangular wave having a duty ratio determined by the duty ratio determining means.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP16250488U JPH0283597U (en) | 1988-12-16 | 1988-12-16 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP16250488U JPH0283597U (en) | 1988-12-16 | 1988-12-16 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0283597U true JPH0283597U (en) | 1990-06-28 |
Family
ID=31446391
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP16250488U Pending JPH0283597U (en) | 1988-12-16 | 1988-12-16 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0283597U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2000058941A1 (en) * | 1999-03-26 | 2000-10-05 | Rohm Co., Ltd. | Sound source |
| JP2010056594A (en) * | 2008-08-26 | 2010-03-11 | Nec Electronics Corp | Pulse generation device |
-
1988
- 1988-12-16 JP JP16250488U patent/JPH0283597U/ja active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2000058941A1 (en) * | 1999-03-26 | 2000-10-05 | Rohm Co., Ltd. | Sound source |
| US6506968B1 (en) | 1999-03-26 | 2003-01-14 | Rohn Co., Ltd. | Sound source device |
| JP2010056594A (en) * | 2008-08-26 | 2010-03-11 | Nec Electronics Corp | Pulse generation device |
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