JPS6274295U

JPS6274295U -

Info

Publication number: JPS6274295U
Application number: JP16637985U
Authority: JP
Priority date: 1985-10-28
Filing date: 1985-10-28
Publication date: 1987-05-12

Description

[Brief explanation of the drawing]

第１図はこの考案の一実施例を示すブロツク図
である。第２図は第１図実施例の動作を説明する
ための波形図である。第３図はこの考案の他の実
施例を示すブロツク図である。第４図はこの考案
のさらに他の実施例を示すブロツク図である。第
５図はこの考案のその他の実施例を示す要部ブロ
ツク図である。図において、１０は波形データ記憶用ＲＯＭ、
１２はアドレス指定回路、１６ａ〜１６ｆはアン
ドゲート、１８は振幅データレジスタ、２０はＵ
／Ｄカウンタ、２６は比較器、２８はカウンタ、
３２はＤ／Ａ変換器、３４は平滑回路、３６は直
流電源、３８はアナログスイツチを示す。 FIG. 1 is a block diagram showing one embodiment of this invention. FIG. 2 is a waveform diagram for explaining the operation of the embodiment shown in FIG. FIG. 3 is a block diagram showing another embodiment of this invention. FIG. 4 is a block diagram showing still another embodiment of this invention. FIG. 5 is a block diagram of main parts showing another embodiment of this invention. In the figure, 10 is a ROM for storing waveform data;
12 is an addressing circuit, 16a to 16f are AND gates, 18 is an amplitude data register, and 20 is a U
/D counter, 26 is a comparator, 28 is a counter,
32 is a D/A converter, 34 is a smoothing circuit, 36 is a DC power supply, and 38 is an analog switch.

Claims

[Claims for Utility Model Registration] 1. Waveform data output means for outputting multi-bit waveform data, means for generating amplitude data at a certain instant of an envelope signal, having a time width corresponding to the amplitude. means for outputting a time width signal; a D/A converter for converting the waveform data from the waveform data output means into an analog signal; and a D/A converter for converting the output of the D/A converter according to the time width signal. A musical tone signal generating device comprising an enabling means for enabling. 2. The musical tone signal generating device according to claim 1, wherein the enabling means includes means for gating the waveform data from the waveform data output means using the time width signal. 3. The utility model registration claim 3 includes a power supply for applying a DC voltage to the D/A converter, and the enabling means includes means for turning on or off the power supply according to the time width signal. The musical tone signal generating device according to item 1. 4. The musical tone signal generating device according to claim 1, wherein the enabling means includes an analog switch that receives the output of the D/A converter and is controlled by the time width signal.