Voltage measuring apparatus

Details Voltage measuring apparatus Voltage measuring apparatus

2006-04-04

2006-04-04

Tibbits, Pia (Department: 2838)

Electricity: battery or capacitor charging or discharging

Serially connected batteries or cells

Reexamination Certificate

active

07023178

ABSTRACT:
The voltage measuring apparatus includes a voltage measuring unit2being connected to a battery1, a voltage converting unit3connected to the voltage measuring unit2, and a controller4which controls the operation of the voltage measuring unit2based on output of the voltage converting unit3. The voltage measuring unit2includes Pch-MOSFET elements P1and P2constituting a first switch group connected to both terminals of a voltage source Vcn in the battery1, a capacitor Cn connected between the elements P1and P2, and Nch-MOSFET elements N3and N4constituting a second switch group connected to both terminals of the capacitor Cn and to both terminals of the voltage output terminal. A source and a back gate of the Nch-MOSFET element N3of the second switch group are connected to each other.

REFERENCES:
patent: 4833459 (1989-05-01), Geuer et al.
patent: 5818201 (1998-10-01), Stockstad et al.
patent: 6020717 (2000-02-01), Kadouchi et al.
patent: 6147499 (2000-11-01), Torii et al.
patent: 6157165 (2000-12-01), Kinoshita et al.
patent: 6362627 (2002-03-01), Shimamoto et al.
patent: 19605481 (1997-06-01), None
patent: 2001-116777 (2001-04-01), None

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