!NP
INPUT
Fff'LITUIE
AO.JUST
CONTROL
I
NPUT
N . C .
NORM/COl"PL
OF"f"SET
ADJUST
2 1
SELECT
SYP+£TRY
AP'F'LITUOC
ADJUST
CONTROL VOL TAG£
NORWCO.-F'L
/ "
VERNIER
SELECT
POS
t£G
ADJUST
N.C.
+SV -5 . 2. V
RfoFl.... ITUOC
RD.JUST
Figure 1 0.4-1. Shaper IC Block Diagram
Table 1 0.4-1. Shaper IC Output Modes
Inputs
Input
Output
WFl WF2
Selected
Signal
LO
LO
Differential
Linear
LO
HI
Differential
Shaped
HI
LO
Not used
---
HI
HI EECL (0 V, -0.6 V)
Fast Pulse
The main inputs are differential current inputs INP or INP. The
single-ended EECL voltage input (0 V to -0.6
V)
generates an output
pulse with fast, but fixed, transition times.
Wave Forming
In Linear transition mode, the waveform block within the shaper IC
acts as a linear amplifier upon the input from the slope generator
(See Chapter 10.3).
In shaped (Gaussian) mode, the linear slopes of the input pulses are
given gaussian characteristics controlled by the inputs on pins 1 and
24
of the shaper IC.
For fixed transitions, the single ended EECL input is used to provide
fast, fixed mode output pulses having a fixed transition of
4.5
ns.
10.4-2 Servicing the Shaper and Output Amplifier
Summary of Contents for 8112A
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