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參數(shù)資料
| 型號(hào)： | 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(yè)數(shù)： | 8/9頁(yè) |
| 文件大?。?/td> | 112K |
| 代理商： | CA3020A |
3-8
PROCEDURES
:
Input Resistance Terminal 10 to Ground (R
IN10
).
1. Apply desired value of V
CC1
and V
CC2
and set S in
Position 1.
2. Adjust 1kHz input for desired signal level of measurement
3. Adjust R for e
2
= e
1
/2.
4. Record resulting value of R as R
IN10
.
Input Resistance Terminal 3 to Ground (R
IN3
).
1. Apply desired value of V
CC1
and V
CC2
and set S in
Position 2.
2. Adjust 1kHz input for desired signal level of measurement
3. Adjust R for e
2
= e
1
/2.
4. Record resulting value of R as R
IN3
.
FIGURE 10. MEASUREMENT OF INPUT RESISTANCE
NOTE: Push-pull output transformer; load resistance (R
L
) should be selected to provide indicated collector-to-collector load impedance
(R
CC
).
PROCEDURES:
Signal-to-Noise Ratio
1. Close S
1
and S
3
; open S
2
.
2. Apply desired values of V
CC1
and V
CC2
.
3. Adjust e
IN
for an amplifier output of 150mW and record re-
sulting value of E
OUT
in dB as e
OUT1
(reference value).
4. Open S
1
and record resulting value of e
OUT
in dB as e
OUT2
5.
.
Total Harmonic Distortion
1. Close S
1
and S
2
; open S
3
.
2. Apply desired values of V
CC1
and V
CC2
.
3. Adjust e
IN
for desired level amplifier output power.
4. Record Total Harmonic Distortion (THD) in %.
FIGURE 11. MEASUREMENT OF SIGNAL-TO-NOISE RATIO AND TOTAL HARMONIC DISTORTION
3
8
2
10
+V
CC2
+V
CC1
9
SIGNAL
SOURCE
5
μ
F
e
1
510k
3
1kHz
CA3020
CA3020A
5
μ
F
6
4
7
12
5
e
2
1
μ
F
R
1
2
1
2
5k
S
0.01
μ
F
3
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
R
L
5
μ
F
5k
600
S
1
DISTORTION
ANALYZER
BAND-PASS
FILTER:
50Hz
TO
15kHz
e
OUT
RMS
VOLTMETER
S
3
S
2
T (NOTE)
Signal-to-Noise Ratio S N
(
)
20log
10
=
--------------------
CA3020, CA3020A
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