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Long Line Switch Driver @I
The long Line Switch Driver provides level translation from the TTL signal LLL to the gate
signals for Q7 and QS. A high on LLL turns on Q7 and QS.
Line Generator liming
Figure 3 shows the timing relationship between the X and Y Line Generator outputs and the
drive signals. Changes in the X Register, Y Register, and Expand Register Occur only during
the drawing period; that is, when the Sample and Hold circuit is holding. Changes in the LLL
signal occur only during the setup period; that is, when the Integrator is holding. The length
of the drawing period (either 4 or 19 ,US) is determined by A3A2 Intensity Control.
LGX
OR LGY
SMPL
O R
I NTG
OR HLDX
O R H L D Y
I
(
M P
E )
S E T U P
S A
L
( 1
Figure 3. Line Generator Timing
(
T
R
T E )
D R A W
I N
E G
A
( 4 O R 1 9 uSEC)
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