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STV2050A Datasheet(PDF) 52 Page - STMicroelectronics

Part # STV2050A
Description  AUTOMATIC MULTISCAN DIGITAL CONVERGENCE PROCESSOR
PDF  83 Pages
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Manufacturer  STMICROELECTRONICS [STMicroelectronics]
Direct Link  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

STV2050A Datasheet(HTML) 52 Page - STMicroelectronics

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STV2050A - CONVERGENCE
Figure 28. Convergence Channel Structure
Calibrated sources are used to generate the reference current for all CONVERGENCE and
FOCUS DACs.
The reference current is defined as
. (Refer to Section 13 "CURRENT REFERENCE" on
page 61.)
The outputs can be disabled using the CDO bit in the E3 register.
Notes:
1. The CDO bit is a common control for the convergence AND the focus outputs.
2. The CDN bit must be set to 1 for normal operation. Refer to Section 9.7 "MANUFACTURING, AFTER-
SALES SERVICE, LAB TRIAL MODES" on page 49.
In order to perform a “soft” start of the convergence to avoid damaging the amplifiers, a “Soft
Switch On” of the DACs is carried out digitally by applying a reduced digital gain (reduction by
factor 2) for at least 1 field after the DACs have been switched on from high impedance to
normal operation (using the CDO bit) or when the DACs have been previously switched to the
offset values by the slave bus.
CDO
0: High impedance
1: Normal operation.
DAxx
DNxx
+
-
Iref
2
---------



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