Circuit for detecting a level or a variation of an input direct

Details Circuit for detecting a level or a variation of an input direct Circuit for detecting a level or a variation of an input direct

1997-02-28

1999-01-26

Tso, Edward

Electricity: battery or capacitor charging or discharging

Battery or cell discharging

With charging

H01M 1046

Patent

active

058642196

ABSTRACT:
A circuit for detecting a level of an input direct voltage comprises a comparator for comparing the input direct voltage with a reference signal, which by means of an integrator is derived from pulses whose charge quantity is variable in dependence on a comparator direct voltage. The reference voltage has a d.c. component and an a.c. component. The comparator supplies comparator pulses of a given pulse duration when the d.c. component of the reference voltage is substantially equal to the input direct voltage. The level of the input direct voltage is determined from the charge quantity of the pulses and from the pulse duration of the comparator pulses.

REFERENCES:
patent: 4153867 (1979-05-01), Jungfer et al.
patent: 5296797 (1994-03-01), Bartlett
patent: 5313208 (1994-05-01), Bellini
patent: 5570382 (1996-10-01), Miyamoto
patent: 5598085 (1997-01-01), Hasler
patent: 5642027 (1997-06-01), Windes et al.
Patent Abstract of Japan, 8-23326 (Oki Electric Ind Co Ltd), 23 Jan. 1996.

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