Apparatus for digitally subdividing analog periodic signals

Details Apparatus for digitally subdividing analog periodic signals Apparatus for digitally subdividing analog periodic signals

1983-01-20

1986-06-10

Sloyan, T. J.

Communications: electrical

Audible indication

Percussion-type sound producer

318605, 340347M, H03K 1302, G08C 1916

Patent

active

045945799

ABSTRACT:
An incremental length measuring instrument generates analog scanning signals S.sub.1, S.sub.2 with a certain period P which are applied to a comparator in conjunction with two reference signals R.sub.S1, R.sub.S2. The measuring instrument causes the scanning signals S.sub.1, S.sub.2 to change as a function of relative displacement to two components of the measuring instrument. The comparator generates an analog control signal S.sub.D as a function of the difference of the momentary values of the signals applied as inputs to the comparator. The analog control signal S.sub.D is applied as an input to a signal generator which includes an oscillator. The oscillator generates a number of pulses in dependence on the momentary value of the analog control signal S.sub.D. These pulses cause the reference signals R.sub.S1, R.sub.S2 to be modified by the signal generator. In addition, the pulses are fed in a direction dependent manner into an incremental counter which includes a numerical display. The counter maintains a count which is displayed as an indication of the relative position of the two components of the measuring instrument. The reference signals R.sub.S1, R.sub.S2 are modified by the pulses generated by the oscillator until their momentary values correspond to the momentary values of the scanning signals S.sub.1, S.sub.2. When this occurs, the difference between these momentary values is zero and the comparator no longer delivers the control signal S.sub.D, thereby causing the pulse generation by the oscillator to cease. When this happens, the displayed counter state on the incremental counter and the reference signals R.sub.S1, R.sub.S2 remain in their momentary states.

REFERENCES:
patent: 3594783 (1971-07-01), Bullock
patent: 3634838 (1972-01-01), Granqvist
patent: 3914760 (1975-10-01), Logue
patent: 4134106 (1979-01-01), Hungerford
patent: 4156234 (1979-05-01), Molnar
patent: 4225931 (1980-09-01), Schwefel
patent: 4486845 (1984-12-01), Duckworth

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