參數(shù)資料
型號: MPSA20G
廠商: ON SEMICONDUCTOR
元件分類: 功率晶體管
英文描述: Amplifier Transistor NPN Silicon
中文描述: 100 mA, 40 V, NPN, Si, SMALL SIGNAL TRANSISTOR, TO-92
封裝: CASE 29-11, TO-226AA, 3 PIN
文件頁數(shù): 3/7頁
文件大小: 113K
代理商: MPSA20G
MPSA20
http://onsemi.com
3
NOISE FIGURE CONTOURS
(V
CE
= 5.0 Vdc, T
A
= 25
°
C)
Figure 3. Noise Voltage
f, FREQUENCY (Hz)
5.0
7.0
10
20
3.0
Figure 4. Noise Current
f, FREQUENCY (Hz)
2.0
10
20
50
100
200
500
1k
2k
5k
10k
100
50
20
10
5.0
2.0
1.0
0.5
0.2
0.1
BANDWIDTH = 1.0 Hz
R
S
= 0
I
C
= 1.0 mA
100 A
e
I
30 A
BANDWIDTH = 1.0 Hz
R
S
≈ ∞
10 A
300 A
I
C
= 1.0 mA
300 A
100 A
30 A
10 A
10
20
50
100
200
500
1k
2k
5k
10k
Figure 5. Narrow Band, 100 Hz
I
C
, COLLECTOR CURRENT ( A)
500k
Figure 6. Narrow Band, 1.0 kHz
I
C
, COLLECTOR CURRENT ( A)
10
2.0 dB
BANDWIDTH = 1.0 Hz
R
R
Figure 7. Wideband
I
C
, COLLECTOR CURRENT ( A)
10
10 Hz to 15.7 kHz
R
Noise Figure is defined as:
NF
20 log10
en2
4KTRS
4KTRS
In2RS2
1 2
= Noise Voltage of the Transistor referred to the input. (Figure 3)
= Noise Current of the Transistor referred to the input. (Figure 4)
= Boltzman’s Constant (1.38 x 10
23
j/
°
K)
= Temperature of the Source Resistance (
°
K)
= Source Resistance (Ohms)
e
n
I
n
K
T
R
S
3.0 dB4.0 dB
6.0 dB
10 dB
50
100
200
500
1k
10k
5k
20k
50k
100k
200k
2k
20
30
50 70
100
200 300
500 700
1k
10
20
30
50 70
100
200 300
500 700
1k
500k
100
200
500
1k
10k
5k
20k
50k
100k
200k
2k
1M
500k
50
100
200
500
1k
10k
5k
20k
50k
100k
200k
2k
20
30
50
70
100
200 300
500 700
1k
BANDWIDTH = 1.0 Hz
1.0 dB
2.0 dB
3.0 dB
5.0 dB
8.0 dB
1.0 dB
2.0 dB
3.0 dB
5.0 dB
8.0 dB
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