Electrical circuit for driving a load

Details Electrical circuit for driving a load Electrical circuit for driving a load

2005-06-21

2005-06-21

Nguyen, Vinh (Department: 2829)

Electricity: measuring and testing

Measuring, testing, or sensing electricity, per se

With rotor

C324S537000

Reexamination Certificate

active

06909275

ABSTRACT:
The electrical circuit for driving a load comprises a transistor (12;14;22) having a load current flowing therethrough, a measurement device (30,32) for determining the voltage drop across this transistor (12;14;22), a device (42) for impressing a measuring current into the transistor (12;14;22), and a device for determining the resistance value of the transistor (12;14;22) in its ON state, this resistance value being between a known maximum value (RXMAX) and a known minimum value (RXMIN). The device for determining the resistance value is provided with a measuring bridge (36) having the transistor (12;14;22) and a known reference resistor (RR) arranged in its first bridge arm (38) and having three respectively known resistors (R1,R2,R3) arranged in its second bridge arm (40).

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patent: 1050965 (2000-11-01), None
patent: 58135471 (1983-08-01), None
patent: 61065167 (1986-04-01), None

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