BFR30LT1 Datasheet, PDF (3/6 Pages) Motorola, Inc – JFET Amplifiers(N-Channel)

TYPICAL CHARACTERISTICS
BFR30LT1 BFR31LT1
5
VDS = 15 V
4
W VGS = 0
RS = 1 M
3
2
1
0
0.01
0.1
1.0
10
100
f, FREQUENCY (kHz)
Figure 1. Noise Figure versus Frequency
^ 1.2
VGS(off) –1.2 V
1.0
VGS = 0 V
0.8
– 0.2 V
0.6
– 0.4 V
0.4
– 0.6 V
0.2
– 0.8 V
– 1.0 V
0
0
5
10
15
20
25
VDS, DRAIN – SOURCE VOLTAGE (VOLTS)
Figure 3. Typical Drain Characteristics
14
12
VDS = 15 V
VGS = 0
10
f = 1 kHz
8
6
4
2
0
0.001
0.01
0.1
1.0
10
RS, SOURCE RESISTANCE (Megohms)
Figure 2. Noise Figure versus Source
Resistance
^ 1.2
VGS(off) –1.2 V
1.0
0.8
VDS = 15 V
0.6
0.4
0.2
0
– 1.2
– 0.8
– 0.4
0
VGS, GATE – SOURCE VOLTAGE (VOLTS)
Figure 4. Common Source Transfer
Characteristics
Motorola Small–Signal Transistors, FETs and Diodes Device Data
3