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參數(shù)資料
| 型號： | MC33111D |
| 廠商： | MOTOROLA INC |
| 元件分類： | 通信及網(wǎng)絡(luò) |
| 英文描述： | LOW VOLTAGE COMPANDER |
| 中文描述： | SPECIALTY TELECOM CIRCUIT, PDSO16 |
| 封裝： | PLASTIC, SO-16 |
| 文件頁數(shù)： | 1/12頁 |
| 文件大?。?/td> | 176K |
| 代理商： | MC33111D |
Device
Temperature
Range
Package
MC33111
SILICON MONOLITHIC
INTEGRATED CIRCUIT
P SUFFIX
PLASTIC PACKAGE
CASE 648
LOW VOLTAGE
COMPANDER
ORDERING INFORMATION
MC33111D
MC33111P
– 40
°
to + 85
°
C
SO-16
Plastic DIP
16
1
D SUFFIX
PLASTIC PACKAGE
CASE 751B
(SO-16)
16
1
CM
PT
Function
TRUTH TABLE
0
1
X
0
Normal
Comp. Mute
Expander Mute
Passthrough
EM
0
X
1
0
0
X
X
1
MOTOROLA
SEMICONDUCTOR
TECHNICAL DATA
Order this data sheet by MC33111/D
Motorola, Inc. 1994
This document contains information on a new product. Specifications and information herein are subject to change
without notice. This device contains 329 active transistors.
Advance Information
Low Voltage Compander
The MC33111 contains two variable gain circuits configured for
compressing and expanding the dynamic range of an audio signal. One
circuit is configured as an expander, and the other is configured as a
compressor. 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. An internal temperature stable bandgap reference provides
the necessary precision voltages.
Included in the MC33111 are controls for muting each section
independently, and for passthrough of both. Two uncommitted op amps
are available for peripheral functions.
The MC33111 will operate from a supply voltage of 3.0 V to 7.0 V, and
over a temperature range of – 40
°
to + 85
°
C. It is designed to
accommodate a 60 dB dynamic range; from – 40 dB to + 20 dB referenced
to 100 mVrms.
Applications include cordless telephone, CBs, walkie-talkies, and most
voice RF links, and any application where an improvement in the signal to
noise ratio is desired. Other applications include speakerphones and voice
activated intercoms, dictating machines, etc.
Operating Supply Voltage: 3.0 V to 7.0 V
Output Voltage Swing = 2.8 Vp-p with VCC = 3.0 V
No Precision External Components Required
60 dB Dynamic Range Compressed to 30 dB, Re-expandable to 60 dB
Unity Gain Level set at 100 mVrms
Attack and Decay Times Adjustable
Mute and Passthrough Controls
Two Uncommitted Op Amps
Temperature Compensated Reference
Available in Standard DIP and Surface Mount Packages
Simplified Block Diagram
MC33111
PT
CM
EM
VCC
Compressor
Output
Expander
Output
16
1
2
15
Mute/
Passthrough
Logic
Bias &
Reference
Generator
Vb
15 k
Rectifier
7.5 k
40 k
40 k
Vb
10 k
Gain
Rectifier
6
7
Vb
Vb
Microphone
V+
1.0
μ
F
1.0
μ
F
0.5
9
10
5
3
11
14
0.5
Compressor
Input
Expander
Input
Gain
8
4
12
20 k
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