474 Transformer & Amplifier Module

  • 474 Preamplifier Module
  • 474 Transformer Module
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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

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

Electrical

Amplifier voltage Gain500
Amplifier bandwidth (-3dB)5Hz to >100kHz
Amplifier short circuit input noise <1nV Hz-1/2 at 1kHz
Amplifier maximum output10V
Transformer DC resistance0.05Ω
Transformer gain~100
Optimal transformer frequency600Hz

Interface & Mechanical

DimensionsSingle width module, 3U high
ConnectorBNC

Ordering Information

S400_474474 transformer
S400_474_PREAMP474 fixed gain low noise voltage amplifier module

The Bentham Standard

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