900,000+ datasheet pdf search and download

Datasheet4U offers most rated semiconductors data sheet pdf






Signetics

NE649 Datasheet Preview

NE649 Datasheet

Low Voltage Dolby Noise Reduction Circuit

No Preview Available !

Signetics
Linear Products
NE649
Low Voltage Dolby Noise
Reduction Circuit
Product Specification
DESCRIPTION
The NE649 is an audio noise reduction
circuit designed for use in low voltage
entertainment systems. The circuit is
used to reduce the level of background
noise introduced during the recording
and playback of audio signals on mag-
netic tape and improve the noise
level in FM broadcast reception. The
circuit is intended for use in automotive
and portable cassette DolbyTM B-Type
noise reduction systems. This circuit is
available only to licensees of Dolby Lab-
oratories Licensing Corp., San Fran-
cisco.
PIN CONFIGURATION
N Package
Dolby is a trademark of Dolby Laboratories Licensing Corpo-
ration
FEATURE
• Low voltage operation
APPLICATION
• Tape decks
ORDERING INFORMATION
DESCRIPTION
TEMPERATURE RANGE
16-Pin Plastic DIP
ORDER CODE
NE649N
ABSOLUTE MAXIMUM RATINGS
SYMBOL
PARAMETER
Vcc Supply voltage
TA Operating temperature range
TSTG
TSOLD
Storage temperature range
Lead soldering temperature 10sec max
RATING
16
-40 to +85
-65 to + 150
+300
UNIT
V
°C
°C
°C
BLOCK DIAGRAM
16
October 7, 1987
INPUT AMP
185
853-1193 90826




Signetics

NE649 Datasheet Preview

NE649 Datasheet

Low Voltage Dolby Noise Reduction Circuit

No Preview Available !

Low Voltage Dolby· Noise Reduction Circuit
Product Specification
NE649
DC ELECTRICAL CHARACTERISTICS Vee = 9V, f = 20Hz to 20kHz. All levels referenced to 580mVRMS (OdB) at Pin 3,
TA = + 25°C, unless otherwise specified.
SYMBOL
PARAMETER
Vcc Supply voltage range3
Minimum voltage supply for
8dB headroom
10dB headroom
Icc Supply Current
Icc Supply Current1
Av Voltage gain (Pins 5 - 3)
TEST CONDITIONS
f = 1.4kHz
THO < 1%
f = 1kHz
(Pins 6 and 2 connected)
NE649
Min Typ Max
6 9 14
6.5
7.5
11
18
20
24.5 26 27.5
UNIT
V
V
V
mA
mA
dB
Av Voltage gain (Pins 3 - 7)
f = 1kHz, OdB at Pin 3,
noise reduction out
-0.5 0 +0.5
Distortion
f = 20kHz to 10kHz, OdB
f = 20Hz to 10kHz, + 10dB
0.05 0.2
0.2 0.5
Signal Handling
(See Performance Characteristics)
SIN Signal-to-noise rati02
Record
(Pins 6 and 2 connected)
Playback
(Pins 6 and 2 connected)
64 72
74 82
!f = 1.4kHz
OdB
-20dB
-30dB
-1.5 0 +1.5
-17.1 -15.6 -14.1
-24.0 -22.5 -21.0
Record mode frequency
response (at Pin 7) referenced to
encode
monitor pOint (Pin 3)
f = 5kHz
OdB
-20dB
-30dB
-40dB
-1.2
-18.3
-23.3
-30.2
+0.3
-16.8
-21.8
-29.7
+1.8
-15.3
-20.3
-28.2
f = 20kHz
OdB
-20dB
-30dB
-0.8 +0.7 +2.2
-18.8 -17.3 -15.8
-25.0 -23.5 -22.0
Back-to-back frequency response
Using typical record mode response
± 1.5
RIN Input resistance
Pin 5
Pin 2
35 50 65
3.1 4.2 5.3
ROUT
Output resistance
Pin 6
Pin 3
Pin 7
1.9 2.4 3.1
80 120
80 120
Record mode frequency response shift
vs temperature
vs vcc
o to 70°C
-40 to 85°C
6 to 14V
NOTES:
1. With electronic switching.
2. All noise levels are measured CCIR/ARM weighted using a 10k source with respect to Dolby level. See Dolby Laboratories Bulletin 19.
3. The circuit will function as low as Vcc =4.5V (i.e., output signal present). See graphs of Icc and signal handling vs Vcc.
dB
%
%
dB
dB
dB
dB
dB
dB
dB
dB
dB
dB
dB
dB
db
kn
kn
kn
n
n
dB
dB
dBN
October 7, 1987
186


Part Number NE649
Description Low Voltage Dolby Noise Reduction Circuit
Maker Signetics
Total Page 5 Pages
PDF Download

NE649 Datasheet PDF

View PDF for Mobile








Similar Datasheet

1 NE645 (NE646) Dolby Noise Reduction Circuit
NXP
2 NE64535 NPN SILICON LOW NOISE RF TRANSISTOR
Advanced
3 NE646 (NE645) Dolby Noise Reduction Circuit
NXP
4 NE649 Low Voltage Dolby Noise Reduction Circuit
Signetics





Part Number Start With

0    1    2    3    4    5    6    7    8    9    A    B    C    D    E    F    G    H    I    J    K    L    M    N    O    P    Q    R    S    T    U    V    W    X    Y    Z

Site map

Webmaste! click here

Contact us

Buy Components

Privacy Policy