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NE650 Datasheet Preview

NE650 Datasheet

Dolby B-Type Noise Reduction Circuit

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NE650
Dolby B-Type Noise Reduction
Circuit
Product Specification
DESCRIPTION
The NE650 is a monolithic audio noise
reduction circuit designed for use in
Dolby™B-Type noise reduction sys-
tems. The NE650 is used to reduce the
level of background noise introduced
during recording and playback of audio
signals on magnetic tape.
The NE650 features excellent dynamic
characteristics over a wide range of
operating conditions and is pin-compati-
ble with NE645/646. This circuit is avail-
able only to licensees of Dolby Labora-
tories Licensing Corp., San Francisco.
Dolby is a trademark of Dolby Laboratories Licens-
ing Corporation.
PIN CONFIGURATION
I N Package
ORDERING INFORMATION
i-DESCRIPTION
~Plastic DiP
I TEMPERATURE RANGE
o to +70°C
ORDER CODE
NE650N
ABSOLUTE MAXIMUM RATINGS
'---.
SYMBOL
PARAMETER
Vce Supply voltage
I
TA
TSTG
Temperature range
Operating ambient
Storage
TSOLD Lead soldering temperature (10 sec. max)
BLOCK DIAGRAM
RA;:NG~. r":'T I
o to + 70
-65 to + 150
+300
°C
°C
°C
--
16
November 14, 1986
191
853-0953 86554




Philips

NE650 Datasheet Preview

NE650 Datasheet

Dolby B-Type Noise Reduction Circuit

No Preview Available !

Dolby B-Type Noise Reduction Circuit
Product Specification
NE650
DC ELECTRICAL CHARACTERISTICS Vee = 12V, f = 20Hz to 20kHz. All levels referenced to 580mVRMS(Odb) at Pin 3,
TA = + 25°e, unless otherwise noted.
SYMBOL
PARAMETER
TEST CONDITIONS
NE650
Min Typ Max
UNIT
Vee Supply voltage range
lee Supply current
Av Voltage gain (Pins 5 - 3)
Electronic switching on
f = 1kHz (Pins 6 and 2 connected)
8 20
16 24
25.5 26 26.5
V
mA
dB
Av Voltage gain (Pins 3 - 7)
f = kHz, OdB at Pin 3, noise reduction out -0.5 0 +0.5
dB
Av Voltage gain (Pins 2 - 3)
f = 1kHz
13 dB
Distortion
THO: 2nd and 3rd harmonic
f=20Hz to 10kHz, OdB
f=20Hz to 10kHz, + 10dB
0.05 0.1
0.15 0.3
%
%
Signal handling
1% distortion at 1kHz
+12 +15
dB
SIN Signal-to-noise ratio'
Record mode
Playback mode
68 72
78 82
dB
dB
Back-to-back frequency response
Using typical record mode response
±0.5
dB
f = 1.4kHz
OdB
-20dB
-30dB
-0.5
-16.1
-23.5
0
-15.6
-22.5
+0.5
-15.1
-21.5
dB
dB
dB
Record mode frequency response
(at Pin 7) referenced to encode
monitor point (Pin 3)
f = 5kHz
OdB
-20dB
-30dB
-40dB
-0.7
-17.3
-22.3
-30.2
+0.3
-16.8
-21.8
-29.7
+1.3
-16.3
I-21.3
-29.2
dB
dB
dB
dB
f = 20kHz
OdB
-20dB
-30dB
-0.3
-18.3
-24.5
+0.7
-17.3
-23.5
+1.7
-16.3
-22.5
dB
dB
dB
RIN Input resistance
Pin 5
Pin 2
35 50 65
3.1 4.2 5.3
kn
kn
ROUT Output resistance
Pin 6
Pin 3
Pin 7
1.9 2.4 3.1
80 120
80 120
kn
n
n
Back-to-back frequency response
shift
vs TA
vs Vee
ooe to -70oe
8 to 20V
±0.4
±0.4
dB
dB
NOTE:
• All noise levels are measured CCIRtARM weighted using a 10k source with respect to Dolby level. See Dolby Laboratories Bulletin 19.
November 14, 1986
192


Part Number NE650
Description Dolby B-Type Noise Reduction Circuit
Maker Philips
Total Page 5 Pages
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