Oscilloscope for the image display of sectional planes of a body

Details Oscilloscope for the image display of sectional planes of a body Oscilloscope for the image display of sectional planes of a body

1976-11-26

1978-10-10

Farley, Richard A.

Electric lamp and discharge devices: systems

Cathode ray tube circuits

Cathode-ray deflections circuits

315397, 315402, H01J 2970

Patent

active

041198913

ABSTRACT:
A line sweep magnetic deflection system is triggered to display ultrasonic echo impulses during line by line scanning of a body region. Each trigger impulse produces a nonlinear saw-tooth voltage waveform as a function of time which when converted to a corresponding current waveform in the deflection coil produces a constant line deflection velocity for accurate display of echo signals in spite of nonlinearities in the electron optics of the oscilloscope, for example. High gain differential amplifier means force the coil current to conform to the voltage waveform during active line trace, and deviations during retrace intervals cause the application of an overvoltage to the coil driver stage, blocking a normal operating supply voltage therefor, and rapidly driving the coil to its initial energy state, thereby enabling a higher line sweep frequency with consequent optimum display resolution.

REFERENCES:
patent: 3646393 (1972-02-01), Tarr
patent: 3781589 (1973-12-01), Brockmann
patent: 3786303 (1974-01-01), Hilburn
patent: 3887829 (1975-06-01), Owens, Jr.
patent: 3887842 (1975-06-01), Owens, Jr. et al.
patent: 3890542 (1975-06-01), Zimmermann
patent: 3902357 (1975-09-01), Soldner et al.
patent: 3965390 (1976-06-01), Spencer, Jr.
patent: 4031411 (1977-06-01), Schat et al.
Wilcox, "A Complete Monolithic Vertical-Deflection System for Television", IEEE Transactions on Broadcast and Television Receivers, vol. BTR-17, No. 4, pp. 256-262, Nov. 1971.

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