Simple electronic resistance bridge with µOhm resolution at low current

• A simple electronic resistance bridge is described. The bridge compares an unknown four-terminal resistor in the mOmega range with a precision resistance decade in the kOmega range. A lock-in amplifier is used as zero detector. With 10-mA exciting current a resolution better than one part in 3000 is obtained for unknown resistors in the range 3–100 mOmega. Experimental results are shown for a gold sample under pressure in the range 0–35° C and 0–1.3 GPa.

Ämnesord

TEKNIK OCH TEKNOLOGIER  -- Elektroteknik och elektronik -- Reglerteknik (hsv//swe)

ENGINEERING AND TECHNOLOGY  -- Electrical Engineering, Electronic Engineering, Information Engineering -- Control Engineering (hsv//eng)

Nyckelord

Bridge

resistance

sensitivity

high pressure

gold

Au

Electronic measurement and instrumentation

Elektronisk mät- och apparatteknik

Electronics

elektronik

Publikations- och innehållstyp

ref (ämneskategori)

art (ämneskategori)