NTE799
Integrated Circuit
Four Channel "SQ" Decoder
Description:
The NTE799 consists of two high input impedance preamplifiers which are fed with left total, L
T
, and
right total, R
T
signals. The preamplifiers each feed two allphase networks which generate two L
T
signals in quadrature and two R
T
signals in quadrature. The four signals are matrixed to yield left front,
left back, right front, and right back signals (L
F
, L
B
, R
F
, R
B
).
Absolute Maximum Ratings: (T
A
= +25
C unless otherwise specified)
Power Supply Voltage, V
CC
25V
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Power Dissipation (T
A
= +25
C), P
D
750mW
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Derate Above +25
C
6.7mW/
C
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Operating Temperature Range, T
opr
0
to +75
C
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Storage Temperature Range, T
stg
65
to +150
C
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Electrical Characteristics: (V
CC
= +20V, V
in
= 0.5V
(RMS)
@ 1kHz, T
A
= +25
C unless otherwise
specified)
Parameter
Min
Typ
Max
Unit
Supply Current Drain
11
16
21
mA
Input Impedance
1.8
3.0
m
Output Impedance
5.0
k
Channel Balance (L
F
/R
F
)
1.0
0
+1.0
dB
Voltage Gain L
F
/L
T
or R
F
/R
T
1.0
0
+1.0
dB
Relative Voltage Gain L
B
'/L
F
' or R
F
/R
T
1.0
0
+1.0
dB
Maximum Input Voltage for 1% THD at Output R
T
or L
T
2.0
V
(RMS)
Total Harmonic Distortion R
T
or L
T
0.1
%
Signal to Noise Ratio (ShortCircuit Input V
O
= 0.5V
(RMS)
with Output Noise
Referenced to Output Voltage, V
O
) (BW = 20Hz to 20kHz)
80
dB
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