Geometry correction waveform synthesizer

Details Geometry correction waveform synthesizer Geometry correction waveform synthesizer

1992-10-30

1994-11-22

Callahan, Timothy P.

Miscellaneous active electrical nonlinear devices, circuits, and

Signal converting, shaping, or generating

Synthesizer

315370, 327133, 327317, 327306, H03L 716

Patent

active

053672127

ABSTRACT:
A geometry correction waveform synthesizer includes a plurality of DC controlled multipliers each coupled to respective sources of complimentary geometry correction signals. The DC controlled multipliers are coupled to respective gain control voltage sources as well as null adjustment voltage sources to provide a variable amplitude and polarity correction signal output. The individual correction signal outputs of the DC controlled multipliers are combined to form a composite geometry correction signal which is applied to a gain control circuit. The individual gain control signals used by the DC controlled multipliers are added to form a combined gain control signal which is used to control the composite correction signal amplitude and maintain correction signal amplitude within a predetermined range. An overall gain control couples the composite geometry correction signal to the scan system.

REFERENCES:
patent: 3825796 (1974-07-01), Bello
patent: 3997845 (1976-12-01), Wegstedt
patent: 4403199 (1983-09-01), Blackmer

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