
Gain in Cascade Amplifiers 277
RFC3
1 pH
V+
C9
I IO.~
~_/~ 4.7/~F
RFC4
lpH
C4 C5 C6
0.001 pF 0.1/~F 0.001/~F
II = ',1 II
R1
RFC 1
C2
R2
C7
0.1/~F
-
II
F.B.
RFC2
C1 C3
IN >
II II
II - il
~ OUT
Figure
14-5 Cascade MMIC amplifiers for lower frequencies.
pacitor C9, shown in Fig. 14-5 as a feedthrough capacitor. Such a capacitor is usu-
ally mounted on the shielded enclosure housing the amplifier. Capacitors C5 and
C7 are used to bypass signals in the HF region. Because these capacitors are likely
to exhibit substantial series inductance, they will form undesirable resonances
within the amplifier passband. Ferrite ...