The 474 transformer and amplifier module is used as the lock-in amplifier front-end in AC systems for use with current generating detectors including large DC component.
Given a signal having both AC and DC components, the 474 transformer allows de-coupling of the two, with the DC being blocked. Gain can then be applied to the sought after AC signal to ensure optimal recovery.
Voltage biasing of the detector used can be achieved by applying voltage across the primary coil of the transformer.
Core benefits
- Optimal AC signal recovery from detectors having DC signal component
- Ultra-low noise gain
- Facility to permit detector voltage-biasing
Features
- Free-standing transformer unit
- Single width module housed within the 417 unit
- Signal gain provided by transformer and low noise amplifier
- Decouples DC bias source generated photocurrent
- Signal gain provided by transformer and low noise amplifier
- Near-short circuit device operation