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參數(shù)資料
| 型號： | HT8950 |
| 廠商： | Holtek Semiconductor Inc. |
| 英文描述： | Voice Modulator |
| 中文描述： | 語音調(diào)制器 |
| 文件頁數(shù)： | 5/11頁 |
| 文件大小： | 659K |
| 代理商： | HT8950 |
Functional Description
The HT8950 is a single chip LSI designed for
voice modulation. It provides 7 steps to shift the
frequency of an input voice signal up and down.
The chip is also equipped with two special ef-
fects; Vibrato and Robot.
The HT8950 includes a built-in amplifier, 8-bit
A/D converter and current output type of 8-bit
D/A converter in addition to a built-in SRAM.
The brightness of an LE D indicator changes
with the volume of the input voice signal.
Power on initial
The HT8950 enters the Robot state right after
power is initially switched on.
Robot state
The system goes into the Robot state after the
ROB pin is triggered or power is turned on. In
this mode, an input voice can be converted into
a robot voice.
Vibrato
An output voice will be generated with a vibrato
effect when the VIB pin is triggered, regardless
of what state the system is in. The vibrato effect
is toggle activated. In other words, when a voice
output is playing with a vibrato effect, this ef-
fect can be eliminated by retriggering the VIB
pin. The rate of vibrato effect can be changed by
adjusting the resistance of the external resistor
between the OSC2 and Fvil pins.
Voice modulation
The HT8950 provides an 8-bit A/D and a D/A
converters with a sampling rate of 8kHz, ensur-
ing a voice output of high quality and with a
high S/N ratio. The chip includes 7 steps to shift
the frequency of an input signal. The voice
modulation is selected and determined by the
SW0~SW2 inputs.
Input
Step Mode
Speed
R atio
SW2 SW1 SW0
1
1
1
Controlled by TGU
and TDG
Notes
1
1
0
UP3
2
1
0
1
UP2
8/5
1
0
0
UP1
4/3
0
1
1
NORMAL
1
0
1
0
DN1
8/9
0
0
1
DN2
4/5
0
0
0
DN3
2/3
Notes: The TGU switch elevates by one step
mode, and the TGD switch, on the other hand,
falls one step mode step by step as shown:
The system changes to the Robot state after
the ROB pin is triggered, regardless of what
state the system is in.
A voice output is accompanied with a vibrato
effect after the VIB pin is triggered, regard-
less of what state the system is in.
LED indicator
The HT8950 provides a LAMP pin to drive an
external LE D. The brightness of LE D changes
with the volume of the input voice signal.
HT8950
5
5th May ’98
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相關(guān)代理商/技術(shù)參數(shù) |
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|---|---|
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| HT8955 | 制造商:HOLTEK 制造商全稱:Holtek Semiconductor Inc 功能描述:Voice Echo |
| HT8955A | 制造商:HOLTEK 制造商全稱:Holtek Semiconductor Inc 功能描述:Voice Echo |
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