Gary D Nichols

US Patent:

48870110, Dec 12, 1989

Filed:

Feb 23, 1989

Appl. No.:

7/314601

Inventors:

Carl R. Haynie - Carmichael CA
Kirk P. Gipson - Roseville CA
Gary H. Nichols - Auburn CA

International Classification:

H01J 2970
H01J 2976

US Classification:

315403

Abstract:

A signal generator which generates an amplified yoke signal for application to a vertical yoke of a cathode ray tube monitor is presented. The signal generator includes a linear ramp generator and a correction generator. The linear ramp generator has an output on which is placed a ramp signal. The linear ramp generator also has a first input which receives a clock signal. The frequency of oscillation of the clock signal determines the frequency of oscillation of the ramp signal. The linear ramp generator additionally has a second input for receiving a height adjustment signal. The linear ramp generator varies the maximum voltage range of the ramp signal responsive to the height adjustment signal. The maximum voltage range is varied independent of the frequency of oscillation of the ramp signal. The correction generator receives the ramp signal from the linear ramp generator and generates an "S" correction signal.