ITT - Index of

_ .
ITT
SEMICONDUCTORS
TBA940
HORIZONTAL DEFLECTION PROCESSOR
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HORIZONTAL DEFLECTION PROCESSOR
FOR THYRISTOR (SCR) OUTPUT STAGES
Monolithic integrated circuit for pu'lse separation
and line synchronization in television
receivers with thyristor line output stages
(SeR). The TBA940 comprises the sync separator
with noise suppression, the frame pulse
integrator, the phase comparator, a switching
stage fOr automatic change-over of noise immunity,
the line oscillator with frequency range
limiter, a phase control circuit, the output stage
and a supply voltage stabilizer. It delivers a
prepared frame sync pulse for triggering the
frame oscillator. Its phase comparator may be
switched over for video recording operation.
Due to large scale integration only a few external
components are needed. Fig. 1 shows
the block diagram.
Fig.2- .
"A" in Plastic Dual In-Line
TO-116 package·
Dimensions in mm
I
.. -7.62
Upon request there is also available a
quad in-line version TBA 940 "B".
Fig. 1 -
Block diagram and Test Circuit
'.7M
, . I
9 V JLJlFrame P,iS'S HI-'+9: 3
,----""""-------
o so 390 +Z4V
TBA 940-~ --------'--,
+ ,
I
I
2 Output
Input Ilgnal
(vidl.o)
Line flyback
pull" IOV
IOn
Sfyr.
Phase
8-22