Audio Rmplifiers: Preamp
Circuits
'dly regulated, Pulse-Width Modulated power supply assures constant power delivery at
-
all battery voltages between 11.5~ and 14.4~.
Wrn
Custom designed, multi filar
CT
High-current
Multiple bypass capacitors on the incoming ILv
printed circuit card to reduce inductance on groun
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Pure totem-pole dridkrom the
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regulation of power supdlies for all low level circuits, using
filter cirLuits,
Compieherisive proteetion circuits assure reli~ble operation,
which guards against speaker damage,
failure.
Short
loads. Thermal protection, which shuts of
Reverse polarity fltotection, which
Dower lexds are connected
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Attiirk th'&rma!Managcr
and allow the
down.
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citcuit protection, which protects the
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internal amplifier circuitry) remote
the push-pull
2-
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PWM
,
-
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ir
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circuits continuously
1
10
operate over
-
controller
secondary ciriul~r.
in
the unllkely ever
an
pr
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a
m-lrhi
It-l
s,
to
the
in
muding
Kf
an
power supply failure
4
d~scre
DC
protection,
audio output stage
and mismatched
'
event that the
temperature,
tierma1 shut
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ely
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ume-delay
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turn-oq
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i
-:-
ensure
power and 8 gauge
an
abso-
Front end preamplifiers accept up to 8 volts of signal input.
compens
Audio Amplifiers:
a
Thermally-compensated constant-current circuits, which are optically-driven from the
power supply, control the front end differential stages. These circuits control
amplifier thermal drift, increase common mode rejection ratio, and lower the distortion
of the input differential amplifiers.
Locally-degenerated, fully-complementary Class D differential amplifiers have very wide
bandwidth, before global feedback is applied.
High gain bias tracking circuit controls idling current within tight tolerances over the full
operating temperature range of the amplifier.
Poluer
Amplifier
Circuits
and
#ate for
minimize
Specifications
--
MAX
THD
Signal-to-Noise Ratio, below rated power output
kequency Response,
Power, into 2 Ohms
at
1
Watt,
4
Ohm
at
rated
power,
4
Ohm
0.30%
-
lOOdB
20Hz
Crossover : Low Pass
Bass
Boost
rnase
~onmol
Input Sensitivity lOOmV
--
to
-
250Hz
to
2V
-
- - --
(+I-3dB)
-
-
-
-
pp
-
-
--
-
--
pp
Iaput Impedance
Peak Current mnsumption, at
Fuse
Rating
rated
power
into
1
Ohm
10K
-
120
Amperes
30x4
Ohm
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