Time counting circuit, sampling circuit, skew adjusting circuit,

Details Time counting circuit, sampling circuit, skew adjusting circuit, Time counting circuit, sampling circuit, skew adjusting circuit,

1998-06-18

1999-07-06

Wambach, Margaret R.

Miscellaneous active electrical nonlinear devices, circuits, and

Specific signal discriminating without subsequent control

By amplitude

327 93, 327 94, 327 95, 327 96, 327 77, H03K 190175

Patent

active

059202092

ABSTRACT:
There is provided a time counting circuit which measures a pulse spacing of a pulse signal with a high accuracy and exhibits high resistance to variations in power-source voltage.
A delay circuit ring consists of a plurality of delay circuits connected in a ring configuration and signal transition is caused to circulate around the delay circuit ring by oscillation. A switch-signal generating circuit outputs first and second switch signals based on the time at which a pulse signal to be measured rises. A row of sampling circuits consists of a plurality of sampling circuits connected to the output terminals of the respective delay circuits and samples the output signals from the delay circuits in response to a direction indicated by the first switch signal. A row of holding circuits consists of a plurality of holding circuits connected to the output terminals of the respective sampling circuits and holds the output signals from the sampling circuits in response to a direction indicated by the second switch signal. An operating circuit calculates the pulse spacing of the pulse signal to be measured based on a logic level signal outputted from the row of holding circuits.

REFERENCES:
patent: 5410269 (1995-04-01), Ohie et al.
patent: 5481212 (1996-01-01), Shima
patent: 5625304 (1997-04-01), Azadet et al.
patent: 5659497 (1997-08-01), Ueno et al.
patent: 5666075 (1997-09-01), Schinzel
Technical Report of Ieice, "A Time-to-Digital Converter LSI", IDC 93-77, pp. 37-43, 1993-08.

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