Differential time interpolator

Details Differential time interpolator Differential time interpolator

1996-04-16

1997-12-02

Roskoski, Bernard

Horology: time measuring systems or devices

Time interval

Electrical or electromechanical

G04F 800

Patent

active

056943776

ABSTRACT:
The disclosed apparatus includes first and second delay lines, the first delay line having an input tap and a set of n output taps F.sub.1, F.sub.2, . . . F.sub.n, and the second delay line having an input tap and a set of n output taps S.sub.1, S.sub.2, . . . S.sub.n, and each of the output taps has an associated delay interval. A first signal representative of a first event is applied to the input tap of the first delay line, and a second signal representative of a second event is applied to the input tap of the second delay line. The disclosed apparatus further includes a set of n latches L.sub.1, L.sub.2, . . . L.sub.n, and a set of n delay units D.sub.1, D.sub.2, . . . D.sub.n. The output signals generated by taps F.sub.i and S.sub.i are applied to a first input terminal and a second input terminal, respectively, of latch L.sub.i. Each of the latches generates a latch signal by using one of the signals applied to its first and second input terminals to latch the signal applied to the other of its first and second input terminals. The latch signal generated by latch L.sub.i is applied to the delay unit D.sub.i. Each of the delay units delays its latch signal by an associated latch delay interval and thereby generates a code signal. The associated latch delay interval of delay unit D.sub.i is at least as large as a difference between the output delay intervals associated with the nth and ith output taps S.sub.n and S.sub.i of the second delay line.

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