The FEMTO series of miniaturized lock-in amplifiers have settings – e.g. phase, gain, time constant – controlled either by switches directly on the amplifier module or externally.  The lock-in amplifiers are well suited for amplifying signals from high impedance sources like photodiodes or PMTs while the voltage input can be used to measure signals from low impedance sources like pyros or coils.  These amplifiers include:

• LIA-MV-150 series Compact Lock-In Amplifiers
• LIA-MV(D) series Lock-in Amplifier Modules
• LIA-BV(D) series Plug-in Board

FEMTO has a broad range of the lowest noise signal recovery amplifiers including:

• Current Amplifiers
• Voltage Amplifiers 
• High Speed GHz Amplifiers
• Photoreceivers and Balanced Photoreceivers
• Custom Amplifiers