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參數(shù)資料
| 型號： | CA3020A |
| 廠商： | INTERSIL CORP |
| 元件分類： | 音頻／視頻放大 |
| 英文描述： | 8MHz Power Amps For Military, Industrial and Commercial Equipment |
| 中文描述： | 1 W, 1 CHANNEL, AUDIO AMPLIFIER, MBCY12 |
| 封裝： | METAL CAN-12 |
| 文件頁數(shù)： | 7/9頁 |
| 文件大?。?/td> | 112K |
| 代理商： | CA3020A |
3-7
PROCEDURES:
1. Apply desired value of V
CC1
and V
CC2
.
2. Apply 1kHz input signal and adjust for e
IN
= 5mV
RMS
.
3. Record the resulting value of e
OUT
in dB (reference
value).
4. Vary input-signal frequency, keeping e
IN
constant at 5mV,
and record frequencies above and below 1kHz at which
e
OUT
decreases 3dB below reference value.
5. Record bandwidth as frequency range between -3dB
points.
FIGURE 8. MEASUREMENT OF BANDWIDTH AT -3dB POINTS
NOTE: Push-pull output transformer; load resistance (R
L
) should be
selected to provide indicated collector-to-collector load impedance
(R
CC
).
PROCEDURES:
1. Apply desired value of V
CC1
and V
CC2
and reduce e
IN
to
0V.
2. Record resulting values of I
CC1
and I
CC2
in mA as Zero-
Signal DC Current Drain.
3. Apply desired value of V
CC1
and V
CC2
and adjust e
IN
to
the value at which the Total Harmonic Distortion in the
output of the amplifier = 10%.
4. Record resulting value of I
CC1
and I
CC2
in mA as Maxi-
mum Signal DC Current Drain.
5. Determine resulting amplifier power output in watts and
record as Maximum Power Output (P
OUT
).
6. Calculate Circuit Efficiency (
η
) in % as follows:
.
where P
OUT
is in watts, V
CC1
and V
CC2
are in volts, and
I
CC1
and I
CC2
are in amperes.
7. Record value of e
IN
in mV
RMS
required in Step 3 as
Sensitivity (e
IN
).
8. Calculate Transducer Power Gain (G
p
) in dB as follows:
NOTE:
4. See Figure 10 for definition of R
IN(10)
.
FIGURE 9. MEASUREMENTS OF ZERO-SIGNAL DC CURRENT DRAIN, MAXIMUM-SIGNAL DC CURRENT DRAIN, MAXIMUM
POWER OUTPUT, CIRCUIT EFFICIENCY, SENSITIVITY, AND TRANSDUCER POWER GAIN
3
2
8
4
5
12
7
3
+V
CC2
6
+V
CC1
9
CA3020
CA3020A
SIGNAL
SOURCE
10
μ
F
1
μ
F
e
IN
e
OUT
50
50
50
3
8
4
2
6
7
10
+V
CC2
5
+V
CC1
9
SIGNAL
SOURCE
5
μ
F
0.01
μ
F
e
IN
510
k
3
12
5
μ
F
3k
1kHz
CA3020
CA3020A
T
(NOTE)
R
L
e
OUT
5
μ
F
5k
I
CC1
I
CC2
+
-
+
-
η
100
VCC2ICC2
--------------------------------+
=
Gp
10log10
=
-----------------
where PINin mW
)
)
Note 4
(
)
---------------+
=
CA3020, CA3020A
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