Ultra low noise current preamplifier for lock-ins

• 1 V/nA fixed gain
• 5 fA/√Hz input noise
• Bias voltage input
• Powered by SRS lock-in amplifiers

Low noise current preamplifier for lock-ins

• 10V/µA fixed gain
• 120 kHz bandwidth
• Bias voltage input
• Powered by SRS lock-in amplifiers

• 5 fA/√Hz input noise
• 1 MHz maximum bandwidth
• 1 pA/V maximum gain
• Adjustable bias voltage
• Two configurable signal filters
• Variable input offset current
• Line or battery operation
• RS-232 interface

• 4 nV/√Hz input noise
• 1 MHz bandwidth
• Variable gain from 1 to 50,000
• AC or DC coupled
• Two configurable signal filters
• Differential and single-ended inputs
• Line or battery operation
• RS-232 interface

• Transformer-coupled input
• 0.1 nV/√Hz input noise
• 0.1 Hz to 40kHz bandwidth
• Gain of 100 or 500
• Single-ended and differential inputs
• >40 dB isolation from DC to 500 MHz
• Powered by SRS lock-in amplifiers

• 1.4 nV/√Hz input noise
• BJT input, 100 MΩ input impedance
• Gain of 10, 20, 50 or 100
• Single-ended and differential inputs
• AC coupled input
• Powered by SRS lock-in amplifiers

• 3.6 nV/√Hz input noise
• FET input, 100 MΩ input impedance
• Gain of 1, 2, 5 or 10
• Single-ended and differential inputs
• AC coupled input
• Powered by SRS lock-in amplifiers
• High common mode rejection

• 4 independent channels
• DC to 350 MHz bandwidth
• 1 ns rise/fall time
• 6.4 nV/√Hz input noise
• Voltage gain to 625
• 50 Ω input and output impedance
• 3 ns overload recovery
• Excellent phase linearity