D Understanding Inputs And Usage Of Probes; Overview Of Inputs - HBM Genesis GEN5i User Manual

D Understanding Inputs and usage of Probes

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D.1

Overview of inputs

Balanced Vs Unbalanced
A balanced input describes an amplifier input stage where both input terminals
exhibit the same electrical behaviour – like resistance and capacitance.
Unbalanced electrical input properties are different.
Symmetrical Vs Unsymmetrical
Symmetrical (similar to balanced) describes the input properties; if both input
terminals are built up using the same component in a mirrored way, they are
symmetrical; (this will result in a balanced input)
Differential
A differential amplifier is a type of electronic amplifier that multiplies the
difference between two inputs by a constant factor.
Very often a differential amplifier is treated to be isolated – which is wrong.
Single ended
An amplifier where one input is fixed to (measurement) ground.
Note A differential amp can be turned into a single ended one by connecting the
- Ve input to ground.
Isolated
An amplifier where both inputs are isolated from (earth) ground or has infinite
resistance to ground.
Note Isolation can be combined with any of the above mentioned amplifier variants.
GEN5i
I2679-4.0 en