BCW69LT1 Просмотр технического описания (PDF) - Leshan Radio Company
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BCW69LT1 Datasheet PDF : 6 Pages
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LESHAN RADIO COMPANY, LTD.
BCW69LT1 BCW70LT1
TYPICAL NOISE CHARACTERISTICS
(V CE = – 5.0 Vdc, T A = 25°C)
10
7.0
5.0
3.0
2.0 1.0mA
IC=10 µA
BANDWIDTH = 1.0 Hz
R S~ ~ 0
30µA
100µA
300µA
1.0
10
20
50 100 200 500 1.0k 2.0k
f, FREQUENCY (Hz)
Figure 1. Noise Voltage
5.0k 10k
10.0
7.0
5.0
3.0
2.0
1.0
0.7
0.5
0.3
0.2
0.1
10 20
I =1.0mA
C
BANDWIDTH = 1.0 Hz
R S ~ ~
300µA
100µA
30µA
10µA
50 100 200 500 1.0k 2.0k 5.0k 10k
f, FREQUENCY (Hz)
Figure 2. Noise Current
NOISE FIGURE CONTOURS
(V CE = – 5.0 Vdc, T A = 25°C)
1.0M
500k
200k
100k
50k
20k
10k
5.0k
2.0k
1.0k
500
200
100
10
BANDWIDTH = 1.0 Hz
0.5 dB
1.0 dB
2.0dB
3.0 dB
5.0 dB
20 30 50 70 100
200 300 500 700 1.0K
I C , COLLECTOR CURRENT (µA)
Figure 3. 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
0.5 dB
1.0dB
2.0 dB
3.0 dB
5.0 dB
20 30 50 70 100
200 300 500 700 1.0K
I C , COLLECTOR CURRENT (µA)
Figure 4. Narrow Band, 1.0 kHz
1.0M
500k
200k
100k
50k
20k
10k
5.0k
2.0k
1.0k
500
200
100
10
10 Hz to 15.7KHz
0.5dB
1.0dB
2.0dB
3.0 dB
5.0 dB
20 30 50 70 100
200 300 500 700 1.0K
I C , COLLECTOR CURRENT (µA)
Figure 5. Wideband
Noise Figure is Defined as:
NF = 20 log 10 ( –e–n–2 –+–44K–KT–TR–RS–+–I–n2–R–S–2 –)1/ 2
S
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 )
M13–3/6
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