Time measuring apparatus

Details Time measuring apparatus Time measuring apparatus

1987-05-29

1988-09-20

Salce, Patrick R.

Electricity: battery or capacitor charging or discharging

Serially connected batteries or cells

With discharge of cells or batteries

3281291, 368120, H02J 1500

Patent

active

047728434

ABSTRACT:
In order to accurately measure time interval Tx from time t.sub.j to time t.sub.k, the pulse widths of a start interpolation pulse and a stop interpolation pulse must be measured accurately. The invention uses two time-to-voltage converters, one for the start interpolation pulse and the other for the stop interpolation pulse, to convert these pulses to corresponding voltage signals to thereby measure the pulse widths. These converters each comprises a high speed circuit which comprises a current switch, a capacitor, a constant current source and a diode. Advantageously, even though the start and stop interpolation pulses occur close to each other, the pulses can be measured accurately. Also, even though the pulses occur at short intervals, the time interval Tx can be measured accurately.

REFERENCES:
patent: 4002979 (1977-01-01), Giori et al.
patent: 4090141 (1978-05-01), Leblanc
patent: 4362394 (1982-12-01), Menlove
patent: 4613950 (1986-09-01), Knierim et al.
patent: 4637733 (1987-01-01), Charles et al.

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