J308 Datasheet, PDF (7/7 Pages) ON Semiconductor – JFET VHF/UHF Amplifiers

J/SST/U308 Series
Vishay Siliconix
TYPICAL CHARACTERISTICS (T_A = 25_C UNLESS OTHERWISE NOTED)
Reverse Admittance vs. Frequency
10
T_A = 25_C
V_DG = 10 V
I_D = 10 mA
Common–Gate
Output Admittance vs. Frequency
100
T_A = 25_C
V_DG = 10 V
I_D = 10 mA
Common–Gate
1
–b_rg
+g_rg
0.1
–g_rg
10
b_og
1
g_og
0.01
100
200
500
f – Frequency (MHz)
1000
Equivalent Input Noise Voltage vs. Frequency
20
V_DS = 10 V
16
12
I_D = 1 mA
8
4
I_D = 10 mA
0
10
100
1k
10 k
f – Frequency (Hz)
100 k
0.1
100
200
500
f – Frequency (MHz)
1000
Output Conductance vs. Drain Current
150
V_GS(off) = –3 V
V_DS = 10 V
f = 1 kHz
120
90
60
30
0
0.1
T_A = –55_C
25_C
125_C
1
10
I_D – Drain Current (mA)
Document Number: 70237
S-04028—Rev. G, 04-Jun-01
www.vishay.com
7-7