- 您现在的位置：买卖IC网 > PDF目录48103 > YMU757B-QZ TONE/MUSIC SYNTHESIZER, PQCC20 PDF资料下载
参数资料
| 型号： | YMU757B-QZ |
| 元件分类： | 音频合成 |
| 英文描述： | TONE/MUSIC SYNTHESIZER, PQCC20 |
| 封装： | LEAD FREE, QFN-20 |
| 文件页数： | 36/43页 |
| 文件大小： | 990K |
| 代理商： | YMU757B-QZ |
第1页第2页第3页第4页第5页第6页第7页第8页第9页第10页第11页第12页第13页第14页第15页第16页第17页第18页第19页第20页第21页第22页第23页第24页第25页第26页第27页第28页第29页第30页第31页第32页第33页第34页第35页当前第36页第37页第38页第39页第40页第41页第42页第43页
YMU757B
-41-
General description of FM sound generator
"FM" stands for Frequency Modulation.
The FM sound generator utilizes the higher harmonic wave produced by the frequency modulation for synthesis of the
musical sounds
As use of this FM system enables a comparatively simple circuit to produce such waveform that has a harmonic wave
including disharmonious sounds, it is possible to create a wide range of sounds from the synthesized sounds of the
natural musical instruments to the electronic sounds.
The diagram below shows the most basic configuration of the FM system.
The "Operator" refers to the section where a sine wave is generated and the combination of the operators is called
"algorithm". The operator in the front stage is called "modulator" and that in the rear stage "carrier".
Each operator is capable of setting the frequency and the envelope waveform.
The configuration in the above diagram can be expressed in the formula as follows.
FM(t) = A sin(ωct + B sin ωmt )
A : Amplitude of the carrier. B : Amplitude of the modulator. ωc : Angle frequency of the carrier
ωm : Angle frequency of the modulator
In addition, a system called "feedback FM" is available to create a wider range of sounds. In this system, the frequency
modulation is fed back as shown in the diagram in the following page.
B is called "feed-back ratio". Using the feed-back FM function, it is possible to produce the strings type sounds.
ωm
Phase
Generator
Operator 1 : Modulator
I
Operator 2 : Carrier
ωc
f
Sin Wave
Table
ωc
Phase
Generator
A
Sin Wave
Table
Envelope
Generator
Envelope
Generator
β
相关PDF资料 |
PDF描述 |
|---|---|
| YMU757B-Q | TONE/MUSIC SYNTHESIZER, PQCC20 |
| YMU757B | 1-4 CABLE/SATELLITE TV SPLITTER, 2GHZ |
| YMU757B | TONE/MUSIC SYNTHESIZER, PQCC20 |
| YMU757 | TONE/MUSIC SYNTHESIZER, PDSO20 |
| YMU759-Q | TONE/MUSIC SYNTHESIZER, PQCC32 |
相关代理商/技术参数 |
参数描述 |
|---|---|
| YMU759 | 制造商:未知厂家 制造商全称:未知厂家 功能描述:SYNTHESIS LSI FOR PORTABLE TELEPHONE |
| YMU759B-Q | 制造商:未知厂家 制造商全称:未知厂家 功能描述:Telecommunication IC |
| YMU762 | 制造商:未知厂家 制造商全称:未知厂家 功能描述:Mobile Audio 3 |
| YMW025 | 制造商:YEONHO 制造商全称:YEONHO ELECTRONICS 功能描述:2.50mm PITCH CONNECTOR |
| YMW025-02R | 制造商:YEONHO 制造商全称:YEONHO ELECTRONICS 功能描述:2.50mm PITCH CONNECTOR |
发布紧急采购，3分钟左右您将得到回复。