YOUDA INTEGRATED CIRCUIT
YD5020
LOW VOLTAGE COMPANDER—YD5020
DESCRIPTION
The YD5020 contains two variable gain circuits configured for compressing and expanding the dynamic range
of an audio signal. One circuit is configured as an expander, while the other circuit can be configured as a compressor
or expander. Each circuit has a full wave rectifier to provide average value information to a variable gain cell located
in either the input stage or the feedback path.
FEATURES
*Low voltage operation: Vopr=1.8�½�5.0V
*Decreasing external component
*Built in compressor and expander mute circuit
*Unity gain level set a 100mVrms
*Response time adjustable
BLOCK DIAGRAM
14
Vcc
13
12
11
10
9
8
_
Mute
Bais
+
_
Mute
+
VB
VB
Gain
RECT
Gain
RECT
Vref
1
2
3
VB
4
5
6
GND
7
WuXi YouDa Electronics Co., Ltd
Tel:
Add: No.5 Xijin Road, National Hi-Tech Industrial Development Zone, Wuxi Jiangsu China
86-510-85205117
86-510-85205106
Fax: 86-510-85205110
Website: www.e-youda.com
SHENZHEN OFFICE
Tel： 86-755-83740369
Fax： 86-755-83741418
1 of 4
2006-08-11
Ver 5.0
YOUDA [ WUXI YOUDA ELECTRONICS CO.,LTD ]
