Digital time base with corrected analog interpolation

Details Digital time base with corrected analog interpolation Digital time base with corrected analog interpolation

1987-12-07

1989-06-20

Miska, Vit W.

Horology: time measuring systems or devices

Time interval

Electrical or electromechanical

368117, 341120, H03K 1320

Patent

active

048414972

ABSTRACT:
A digital time base with analog interpolation provides a variable reference voltage to assure that the period of an analog ramp between a zero value and a maximum value is equal to the time interval between range clock pulses. A time base error is determined by establishing a zero reference level on a test pulse rising edge corresponding to the zero value of the analog ramp, and then establishing a maximum level on the test pulse corresponding to the maximum value of the analog ramp initiated one clock pulse prior to the test pulse. The difference between the two levels on the test pulse represents the time base error. A microprocessor provides a corrected reference voltage as the maximum value so that the maximum delay of the analog ramp equals the time interval between clock pulses.

REFERENCES:
patent: 3493961 (1970-02-01), Hansen
patent: 3750142 (1973-07-01), Barnes et al.
patent: 3949393 (1976-04-01), Bjornsen et al.
patent: 4214234 (1980-07-01), Cunningham, Jr.
patent: 4581585 (1986-04-01), Bristol

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