Page 154 - The Art and Science of Analog Circuit Design

Who Wakes the Bugler?

Two Types of Lossy Capacitor T-coils

ROSS CONSTANT-RESISTANCE T-COIL

LT I J I-T2

I'*
2
,, v3 C
> RL
A>2_ _1
(3 = damping/actor of quadratic response
vi
-T-=/?L The Constant-Resistance property
V2
Two Pole Response

HALLEN MINIMUM VSWR T-COIL

For the Hallen and the Ross T-coils

As RB gets bigger .the input coil inductance
gets smaller.
With a finite RB, the response at RL is not
allpass

ReC cTt(R c+2RB) _ 2RBT t+R eR cCc
l

2R BR cC cT t LiL 2
r =
T t+R eC c+RcCc Ll+L2

Figure 10-11.
Two Types of Lossy
Capacitor T-coils.

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