Voltage Controlled Current Source with Active Common Mode Rejection
The AMS220 is preferentially designed for low-noise / low-level resistance measurements using lock-in amplifiers, but it can be used also in combination with DAQ devices in many types of DC or AC electrical measurements, where well defined current excitation of D.U.T. is required.
- ensures active rejection of common mode voltage in resistance measurements,
- allows routine measurements of very low resistances (less than 1 mΩ) even in the most demanding conditions (e.g., temperatures below 500 mK),
- can operate as an external module of a lock-in amplifier to extend its functionality to that of an ac-resistance (impedance) bridge.
The AMS560 Preamplifier (Gain=1000) is designed for use with the AMS220 to perform very-low resistance measurements...Read More