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SSM2000 Datasheet

  • SSM2000

  • HUSH Stereo Noise Reduction System with Adaptive Threshold

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a
HUSH Stereo Noise Reduction System
with Adaptive Threshold
SSM2000
PIN CONFIGURATION
24-Lead Plastic DIP
24-Lead SOIC
L IN 1
R IN 2
L VCF C1 3
L VCF C2 4
V+ 5
ACOM 6
24 L OUT
23 R OUT
22 R VCF C1
21 R VCF C2
FEATURES
Up to 25 dB of Noise Reduction from Virtually Any
Audio Source without Sonic Artifacts
鈥淪ingle-Ended鈥?Operation Eliminates Need for Encode-
Decode Process
Adaptive Threshold Dynamically Adjusts to Changing
Nominal Signal Levels
Effectively Decodes Dolby B
廬
Encoded Sources
Direct VCA Control Port Access for Additional Level
Control Functionality
Logic-Controllable Bypass and Muting
100 dB Dynamic Range (Noise Reduction OFF)
0.02% Typical THD+N (@ 1 kHz, Noise Reduction OFF)
+7 V to +18 V Operation
No Royalty Requirements
APPLICATIONS
Auto Radio Sound Processing
Multimedia PC Sound Cards
Television Sound Processing
Cassette Tape Players
AM/FM Receivers
Telephone & Wireless Links
Professional Audio
GENERAL DESCRIPTION
SSM2000
20 V鈥?/div>
TOP VIEW 19 DIGITAL GND
VCA PORT 7 (Not to Scale) 18 NC
VCF DET IN
SUM OUT
8
9
17 MUTE
16 DEFEAT
15 AUTO THRESHOLD CAP
14 DEFAULT THRESHOLD
13 NC
VCA DET IN 10
VCF DET CAP 11
VCA DET CAP 12
NC = NO CONNECT
6.8碌F
L IN
6.8碌F
1
2
3
1nF
24
23
22
1nF
L OUT
R OUT
R VCF CAP 1
R VCF CAP 2
V鈥?/div>
DIGITAL GND
DO NOT CONNECT
1
MUTE
DEFEAT
0.22碌F
R IN
L VCF CAP 1
L VCF CAP 2
V+
ANALOG COMMON (V+/2)
VCA CONTROL PORT
20nF
2nF
The SSM2000 is an advanced audio noise reduction system
based on proprietary HUSH
廬
circuitry. HUSH combines a dy-
namic filter and downward expander to provide a high level of
effectiveness without the sonic artifacts normally associated with
noise reduction systems. In addition, an Adaptive Threshold
circuit detects nominal signal levels and dynamically adjusts
both thresholds, thereby providing optimal results regardless of
program source. Since it is a single-ended system, HUSH can
be used on virtually any audio source, including audio and
video tapes, radio and television broadcasts, or any other source
with objectionable noise. The SSM2000 can be used with
Dolby B encoded sources with excellent results. A key feature is
direct access to the Voltage Controlled Amplifier port enabling
additional functions such as dc volume control, automatic level-
ing, compression, etc. with minimal external circuitry.
Dolby B is a registered trademark of Dolby Laboratories, Inc.
HUSH is a registered trademark of Rocktron Corporation.
4
5
21
20
SSM2000
6
7
8
500鈩?/div>
1k鈩?/div>
19
18
17
16
15
14
13
VCF DET IN
20nF
9
SUM OUT
VCA DET IN
1.0碌F
3碌F
10
VCF DET TC
3.3碌F
AUTO
THRESHOLD CAP
DEFAULT
THRESHOLD
2
DO NOT CONNECT
1
11
12
VCA DET TC
NOTES:
1
MAKE NO CONNECTION TO PINS 13 AND 18
2
DEFAULT THRESHOLD. NORMALLY CONNECTED TO ANALOG COMMON
Figure 1. Typical Basic Application
REV. 0
Information furnished by Analog Devices is believed to be accurate and
reliable. However, no responsibility is assumed by Analog Devices for its
use, nor for any infringements of patents or other rights of third parties
which may result from its use. No license is granted by implication or
otherwise under any patent or patent rights of Analog Devices. (See page 16.)
漏 Analog Devices, Inc., 1996
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 617/329-4700
Fax: 617/326-8703

SSM2000相關(guān)型號(hào)PDF文件下載

  • 型號(hào)
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    描述
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    下載
  • 英文版
    HUSH Stereo Noise Reduction System with Adaptive Threshold
    AD
  • 英文版
    HUSH Stereo Noise Reduction System with Adaptive Threshold
    AD [Analog...
  • 英文版
    Decoder 5.1-Channel Soundfield Generator
    AD
  • 英文版
    Decoder 5.1-Channel Soundfield Generator
    AD [Analog...
  • 英文版
    VOLTAGE CONTROLLED AMPLIFIER
    ETC
  • 英文版
    VOLTAGE CONTROLLED AMPLIFIER
    ETC [ETC]
  • 英文版
    OPERATIONAL VOLTAGE CONTROLLED ELEMENT
    ETC
  • 英文版
    OPERATIONAL VOLTAGE CONTROLLED ELEMENT
    ETC [ETC]
  • 英文版
    Self-Contained Audio Preamplifier
    AD
  • 英文版
    Self-Contained Audio Preamplifier
    AD [Analog...
  • 英文版
    Trimless Voltage Controlled Amplifiers
    AD
  • 英文版
    Trimless Voltage Controlled Amplifiers
    AD [Analog...
  • 英文版
    Self-Contained Audio Preamplifier
    AD
  • 英文版
    Self-Contained Audio Preamplifier
    AD [Analog...
  • 英文版
    DUAL LINEAR ANTILOG VOLTAGE CONTROLLED AMPLIFIER
    ETC
  • 英文版
    DUAL LINEAR ANTILOG VOLTAGE CONTROLLED AMPLIFIER
    ETC [ETC]
  • 英文版
    DUAL LINEAR ANTILOG VOLTAGE CONTROLLED AMPLIFIER
    ETC
  • 英文版
    DUAL LINEAR ANTILOG VOLTAGE CONTROLLED AMPLIFIER
    ETC [ETC]
  • 英文版
    QUAD CURRENT CONTROLLED AMPLIFIER
    ETC
  • 英文版
    QUAD CURRENT CONTROLLED AMPLIFIER
    ETC [ETC]

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