Excavating
Patent
1981-05-18
1983-06-21
Heyman, John S.
Excavating
371 27, 328 58, H03K 370, H03K 378, H03K 386, H03K 506
Patent
active
043896146
ABSTRACT:
In a method for the generation, without dead time, of pulses appearing in successive pulse intervals, with a high time resolution of the pulse intervals and of the pulses, the signals characterizing start (IIN1A, IIN2A) and end (IIN1E, IIN2E) of a pulse interval are generated under storage control by an oscillator (1) for giving coarse time raster values, and a delay circuit (3, 4) series-arranged with the oscillator (1) and with selective (7, 8) delay circuit taps (5, 6) for giving fine time raster values. The signals characterizing the pulse intervals are alternatingly applied to one of two paths (path I, path II), such that the signal characterizing the respective pulse interval start coincides with the coarse time raster predetermined by the oscillator (1). For each path, the leading and trailing edge of a pulse to be generated within a pulse interval is derived via oscillator clock-driven counters (45, 47, 46 and 48) loadable with a count, upon a specific count being reached. Series-arranged to the counters for generating the leading and trailing edges ( 45, 46 and 47, 48) a respective common delay circuit (51 and 52) is provided with storage-controlled (43, 44) selectable delay line taps (62 and 79) for a fine time raster. The pulse information generated on both paths is joined on a common line (65).
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DeBruin Wesley
Heyman John S.
International Business Machines - Corporation
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