Sweep circuit for oscilloscope

Details Sweep circuit for oscilloscope Sweep circuit for oscilloscope

1987-04-29

1989-03-14

Blum, Theodore M.

Electric lamp and discharge devices: systems

Cathode ray tube circuits

Cathode-ray deflections circuits

315408, H01J 2970, H01J 2972

Patent

active

048127175

ABSTRACT:
The oscilloscope sweeping circuit includes a first D/A converter which converts sweep rate step digital data into a charge current under the weighting of a reference current applied thereto. The charge current charges a capacitor and the amount of the charge determines the sweep rate. The reference current is produced by a second D/A converter which converts fine step digital data into an analog current.

REFERENCES:
patent: 4642531 (1987-02-01), Jobling et al.
patent: 4686432 (1987-08-01), Berland et al.
patent: 4698556 (1987-10-01), Jobling et al.

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