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Voltage translator circuitry may include a path including a first resistor, a current controlling device, and a second resistor coupled in series. The voltage translator circuitry may further include an operational amplifier having a positive supply terminal to accept a positive supply voltage and a

Voltage translator circuitry may include a path including a first resistor, a current controlling device, and a second resistor coupled in series. The voltage translator circuitry may further include an operational amplifier having a positive supply terminal to accept a positive supply voltage and a negative supply terminal to accept a negative supply voltage, neither the positive or negative supply voltage at ground voltage. The first resistor may further be coupled to a positive terminal of the battery cell to be monitored. The operational amplifier may have an input coupled to a negative terminal of the battery cell to be monitored. The voltage translator circuitry may further include an output terminal coupled to a node of the path between the current controlling device and the second resistor. The output terminal may be configured to provide the ground referenced cell voltage for the battery cell.

대표청구항 ▼

What is claimed is: 1. Voltage translator circuitry for translating a floating cell voltage of at least one of a plurality of battery cells to a ground referenced cell voltage, said voltage translator circuitry comprising:a single operational amplifier comprising:a positive supply terminal configure

What is claimed is: 1. Voltage translator circuitry for translating a floating cell voltage of at least one of a plurality of battery cells to a ground referenced cell voltage, said voltage translator circuitry comprising:a single operational amplifier comprising:a positive supply terminal configured to receive a positive supply voltage,a negative supply terminal configured to receive a negative supply voltage,an inverting input coupled to a path wherein said path is configured to be individually coupled to a positive terminal of each battery cell to be monitored, anda noninverting input configured to be individually coupled to a corresponding negative terminal of each said battery cell to be monitored wherein a voltage, Vcell-, between said non-inverting input and a ground terminal depends on which of the plurality of battery cells is being monitored;a first circuitry configured to adjust said negative supply voltage in response to Vcell- so that said negative supply voltage is less than Vcell- for each battery cell to be monitored, wherein said first circuitry comprises a first voltage regulating device, a first current source and a first transistor; anda second circuitry configured to adjust said positive supply voltage in response to Vcell- so that said positive supply voltage is greater than Vcell- for each battery cell to be monitored, wherein said second circuitry comprises a second voltage regulating device, a second current source and a second transistor.