LM1295 National Semiconductor, LM1295 Datasheet - Page 6

• Manufacturer Part Number: LM1295
• Description: DC Controlled Geometry Correction System for Continuous Sync Monitors
• Manufacturer: National Semiconductor

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Typical Performance Characteristics
Circuit — Figure 2 (Continued)
H Dyn Cntr Output (Pin 14)
V Dyn Focus Output (Pin 16)
−V Drive Output (Pin 23)
Circuit Description
(See Figure 3 , Block Diagram)
The LM1295 has outputs which provide signals for correct-
ing the following CRT distortions: Vertical de-focusing,
East-West pincushion, horizontal trapezoid, horizontal paral-
DS012324-21
DS012324-17
DS012324-19
T
H Dyn Cntr Output (Pin 14)
V Dyn Focus Output (Pin 16)
+V Drive Output (Pin 24)
6
A
= 25˚C, F = 100 Hz, V
lelogram and horizontal bow. The amount and polarity of the
corrections are controlled by voltages between 0V and 4V.
The corrections track the vertical output amplitude.
The LM1295 has five major sections: the vertical oscillator/
amplifier, the parabolic function generator and three
voltage-controlled channels with the correction term outputs.
Height
= 4V, V
Dyn Height
DS012324-22
DS012324-18
DS012324-20
= 3V, Test