GEN7iB
338
UNDERSTANDING INPUTS AND USAGE OF PROBES
UNDERSTANDING INPUTS AND USAGE OF PROBES
15
Differentampliers–ProsandCons
Single-ended(toground)ampliers
● Cost effective and small
● High bandwidth
● Easy to use with probes
● Potential ground problems
● No safety problems
● No CMRR and no CMV
Single-endedisolatedamplier–unbalanceddifferential
● Can perform differential measurements
● Expensive and large
● Diculttousewithprobes
● Limited CMRR, best CMV
● Avoids ground loops
● High level of safety
Differentialamplier(withcommonground)
● Widely used in DAQ
● Good CMRR, limited CMV
● No (safety) isolation and potential ground loops will remain present
Differentialamplierwithisolatedcommon
● Safe
● Expensive and large
● Good CMRR, best CMV
● Morediculttousewithprobes