BCW72LT1 데이터 시트보기 (PDF) - Leshan Radio Company
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BCW72LT1 Datasheet PDF : 6 Pages
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LESHAN RADIO COMPANY, LTD.
TYPICAL NOISE CHARACTERISTICS
(V CE = 5.0 Vdc, T A = 25°C)
BCW72LT1
20
IC=1.0 mA
300µA
10
7.0
100µA
5.0
BANDWIDTH = 1.0 Hz
R S ~ ~ 0
3.0 10µA 30µA
2.0
10 20
50 100 200 500 1.0k 2.0k 5.0k 10 k
f, FREQUENCY (Hz)
Figure 3. Noise Voltage
100
50
IC=1.0mA
20
10
5.0
300µA
BANDWIDTH = 1.0 Hz
R S~ ~
100µA
2.0
1.0
0.5
0.2
0.1
10
30µA
10µA
20
50 100 200 500 1.0k 2.0k
5.0k 10 k
f, FREQUENCY (Hz)
Figure 4. Noise Current
NOISE FIGURE CONTOURS
(V = 5.0 Vdc, T = 25°C)
CE
A
500k
200k
100k
50k
20k
10k
5.0k
2.0k
1.0k
500
200
100
50
10
BANDWIDTH = 1.0 Hz
2.0 dB
3.0 dB 4.0dB
6.0 dB
10 dB
20 30 50 70 100
200 300 500 700 1.0K
I C , COLLECTOR CURRENT (µA)
Figure 5. Narrow Band, 100 Hz
1.0M
500k
200k
100k
50k
20k
10k
5.0k
2.0k
1.0k
500
200
100
10
BANDWIDTH = 1.0 Hz
1.0 dB
2.0 dB
3.0 dB
5.0 dB
8.0 dB
20 30 50 70 100
200 300 500 700 1.0K
I C , COLLECTOR CURRENT (µA)
Figure 6. Narrow Band, 1.0 kHz
500k
200k
100k
50k
20k
10k
5.0k
2.0k
1.0k
500
200
100
50
10
10 Hz to 15.7KHz
1.0 dB
2.0 dB
3.0 dB
5.0 dB
8.0 dB
20 30 50 70 100
200 300 500 700 1.0K
I C , COLLECTOR CURRENT (µA)
Figure 7. Wideband
Noise Figure is Defined as:
( –––––––––––––––) NF = 20 log
10
e
n
2
+4KTRS
+I
2
n
R
2
S
4KTR S
1/ 2
e n = Noise Voltage of the Transistor referred to the input. (Figure 3)
I n = Noise Current of the Transistor referred to the input. (Figure 4)
K = Boltzman’s Constant (1.38 x 10 –23 j/ °K)
T = Temperature of the Source Resistance ( °K)
R s = Source Resistance ( Ω )
M14–3/6
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