Silicon and germanium transistors
(often marked with Q1, Q2 etc, in schematics)
3LQRXWV&ROOHFWRU &%DVH %(PLWWHU (
131 1
3133
&ROOHFWRU&&ROOHFWRU
%DVH%
%DVH
(PLWWHU((PLWWHU
JFET transistors (N-channel)
3LQRXWV'UDLQ '*DWH *6RXUFH 6
*DWH
'UDLQ
6RXUFH
MOSFET transistor (n-channel)
*DWH'UDLQ
6RXUFH
:KDWWKH\ORRNOLNH
JHUPDQLXPJHJHUPDQLXPZLWKKHDWVLQN³ROGHU´VLOLFRQPHWDOFDQ
³PRGHUQ´VLOLFRQPRVIHWMIHW
7KLVLVWKHSLQRXWKRZ\RX³UHDG´WKHP
7UDQVLVWRUV%LSRODU6LOLFRQ
"A", "B" or "C" digit at the end means; "A" = low gain, "B" = medium gain, "C" = high gain ([DPSOH%&%
%&131metal can)
%&131metal can)
%&131
036$131'DUOLQJWRQNPN
036$ NPN 1NPN (metal can)
1NPN 1NPN
1NPN
1NPN 1PNP 1NPN
1PNP
1NPN
1PNP
1PNP 1 NPN 1 NPN 1NPN
1PNP
1'DUOLQJWRQNPN
1'DUOLQJWRQNPN E
B
C
E
B
C
B
C
E
C
B
E
C
B
E
E
B
C
B
C
E
B
C
E
E
B
C
C
B
E
C
C
C
C
B
B
B
B
E
E
E
E
C
B
E
C
C
B
B
E
E
C
E
B
B
E
C
E
B
C
B
C
E
B
C
E
7UDQVLVWRUV)(7VDQG026)(7V
"A", "B" or "C" digit at the end means; "A" = low gain, "B" = medium gain, "C" = high gain ([DPSOH%)$
%))(7 %))(7 %6026)(7
-)(7
03))(7 1)(7 1)(7 13FKDQQHO)(7
1)(7 1)(7 1)(7
D
D
S
G
G
G
G
G
S
G
S
S
S
S
S
G
D
D
D
D
D
G
G
D
D
D
S
S
G
S
D
G
S