Timing signal generator

Details Timing signal generator Timing signal generator

1987-09-04

1989-09-05

Miller, Stanley D.

Electrical transmission or interconnection systems

Nonlinear reactor systems

Parametrons

307600, 307601, 328 63, 328 72, 371 27, 364569, H03K 513, H03K 117, G01R 3128, G04F 0000

Patent

active

048641600

ABSTRACT:
A timing generator for generating timing signals representing the leading and trailing edges of test pulses. In one embodiment of the invention, a period circuit repetitively measures time intervals, or periods, based on signals from a clock circuit, and a marker circuit generates timing signals representing leading edge and trailing edge markers precisely within each period. The period circuit comprises a period-end memory having a plurality of storage locations which are addressed by a modulo(n) counter. To support multiple timing sets, or timing cycles, one or more of the most significant bits of the address field for the period-end memory may be reserved for designating each timing signal. The time interval measured by the period-end memory may be selectively extended by delaying the clocking signal used for incrementing the modulo(n) counter. The marker circuit comprises leading edge and trailing edge marker memories for storing values indicating where in a period a leading edge or a trailing edge marker is generated. The marker circuit further comprises extended cycle leading edge and trailing edge marker memories for storing values indicating where in a later timing cycle a marker is to be generated. Leading edge and trailing edge marker vernier memories are provided for storing values used to indicate the exact placement of markers within the time interval. Leading edge and trailing edge end-of-cycle marker memories are used for generating leading edge and trailing edge markers at the end of a particular timing cycle. Leading edge and trailing edge marker inhibit memories are used for inhibiting marker generation within a particular timing cycle.

REFERENCES:
patent: 4165459 (1979-08-01), Curtice
patent: 4367051 (1983-01-01), Inoue
patent: 4598375 (1986-07-01), Hiramatsu et al.

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