Differential amplifier box

Prototype version of Voltage Amplifier module for SMS/IVVI-rack.
FET-cmos inputs (lemo pin 4/2)
supply: battery unit with regulators

Rin 		>100Gohm (for both dc AND ac-coupling)
Ibias		<1pA
Gain		1-10-100-1000-10000
coupling	ac/dc
drift		1uV/c
Voltage noise	10nV/sqrtHz