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參數資料
| 型號： | THAT4311 |
| 廠商： | Electronic Theatre Controls, Inc. |
| 英文描述： | Low-voltage, Low-power Analog Engine?? Dynamics Processor |
| 中文描述： | 低電壓，低功耗模擬引擎？？動態處理器 |
| 文件頁數： | 1/12頁 |
| 文件大小： | 230K |
| 代理商： | THAT4311 |
THAT Corporation; 45 Sumner Street; Milford, Massachusetts 01757-1656; USA
Tel: +1 508 478 9200; Fax: +1 508 478 0990; Web: www.thatcorp.com
THAT
4311
Description
The THAT 4311 Low Power Dynamics Proces-
sor combines in a single IC all the active circuitry
needed to construct a wide range of dynamics
processors.
The 4311 includes a high perfor-
mance, voltage controlled amplifier, a log re-
sponding RMS-level sensor and three opamps,
one of which is dedicated to the VCA, while the
other two may be used for the signal path or con-
trol voltage processing.
The
exponentially-controlled
two opposing-polarity, voltage sensitive control
ports. Dynamic range exceeds 105 dB, and THD
is typically 0.09% at 0dB gain. The RMS detector
provides accurate RMS to DC conversion over an
VCA
provides
80 dB dynamic range.
Though originally designed for use in micro-
phone noise reduction systems, the 4311 is a use-
ful building block in a number of analog signal
processing applications. The combination of ex-
ponential VCA gain control and logarithmic detec-
tor
response
-
“decibel-linear”
simplifies the mathematics of designing the con-
trol paths of dynamics processors, making it easy
to develop audio compressors, limiters, gates, ex-
panders, de-essers, duckers, and the like.
high level of integration ensures excellent temper-
ature tracking between the VCA and the detector,
while minimizing the external parts count.
response
-
The
T H AT
Corporation
Low-voltage, Low-power
Analog Engine
Dynamics Processor
FEATURES
High Performance VCA, RMS-Level
Detector, and three 0pamps in one
package
Wide Dynamic Range: >105 dB
Low THD: <0.09%
Low Power: 7 mA typ.
Surface-Mount Package
5 VDC Operation
APPLICATIONS
Wireless microphone systems
Wireless in-ear monitors
Compressors and Limiters
Gates
De-Essers
Duckers
18
19
20
17
16
15
14
13
12
11
7
9
8
6
10
5
4
3
2
1
THAT4311
VREF
OA1
OA2
VEE
EC-
EC+
SYM
IN
OUT
IN
CT
OUT
IT
VCA
RMS
OA3
VCC
VREF
Figure 1. THAT 4311 equivalent block diagram
Pin Name
DMP20
RMS IN
1
IT (I
TIME
)
2
OA2 -IN
3
RMS OUT
4
CT (C
TIME
)
5
CLIP
6
OA2 OUT
7
CAP
8
VREF
9
VEE
10
VCC
11
OA3 OUT
12
VCA OUT
13
SYM
14
EC+
15
EC-
16
VCA IN
17
OA1 OUT
18
OA1 -IN
19
OA1 +IN
20
Table 1. THAT 4311 pin assignments
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