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Voltage Controlled Asymmetric Linearity

IP.com Disclosure Number: IPCOM000035174D
Original Publication Date: 1989-Jun-01
Included in the Prior Art Database: 2005-Jan-28

Publishing Venue

IBM

Related People

Authors:
Stone, CD [+details]

Abstract

In a CRT display, an S-shaped current waveform is required through the vertical yoke to provide an undistorted character display. This shaped ramp is generated by adding an exponential charging waveform to an integrated ramp waveform. In the circuit disclosed a variable DC voltage input is used to control the level of correction applied to a vertical ramp generator. The DC voltage may be set up by electronic control.