bcx70klt1 Freescale Semiconductor, Inc, bcx70klt1 Datasheet - Page 3

• Manufacturer Part Number: bcx70klt1
• Description: General Purpose Transistors
• Manufacturer: Freescale Semiconductor, Inc

Motorola Small–Signal Transistors, FETs and Diodes Device Data
500 k
200 k
100 k
500 k
200 k
100 k
7.0
5.0
3.0
2.0
50 k
20 k
10 k
50 k
20 k
10 k
20
10
500
200
100
500
200
100
5 k
2 k
1 k
5 k
2 k
1 k
50
50
10
10
10
10 A
I C = 1.0 mA
20
2.0 dB
30 A
100 A
20
20
300 A
Figure 5. Narrow Band, 100 Hz
50
30
30
Figure 3. Noise Voltage
I C , COLLECTOR CURRENT ( A)
I C , COLLECTOR CURRENT ( A)
100
Figure 7. Wideband
50 70 100
f, FREQUENCY (Hz)
50 70 100
3.0 dB 4.0 dB
200
1.0 dB
500
BANDWIDTH = 1.0 Hz
1 k
200 300
200 300
BANDWIDTH = 1.0 Hz
TYPICAL NOISE CHARACTERISTICS
6.0 dB
10 Hz to 15.7 kHz
5.0 dB
R S = 0
8.0 dB
2 k
2.0 dB
NOISE FIGURE CONTOURS
(V CE = 5.0 Vdc, T A = 25 C)
(V CE = 5.0 Vdc, T A = 25 C)
500 700 1 k
500 700 1 k
10 dB
5 k
3.0 dB
10 k
500 k
200 k
100 k
Noise Figure is defined as:
NF
e n
I n
K
T
R S
50 k
20 k
10 k
100
1 M
500
200
100
5.0
2.0
1.0
0.5
0.2
0.1
5 k
2 k
1 k
50
20
10
= 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)
+
10
10
20 log 10
20
BCX70GLT1 BCX70JLT1 BCX70KLT1
I C = 1.0 mA
30 A
20
Figure 6. Narrow Band, 1.0 kHz
e n 2
50
30
1.0 dB
Figure 4. Noise Current
I C , COLLECTOR CURRENT ( A)
)
100
4KTR S
50 70 100
f, FREQUENCY (Hz)
4KTR S
200
300 A
10 A
)
I n 2 R S 2
500
2.0 dB
100 A
200 300
BANDWIDTH = 1.0 Hz
1 k
BANDWIDTH = 1.0 Hz
3.0 dB
1 2
R S
2 k
500 700 1 k
5.0 dB
8.0 dB
5 k
3
10 k