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Cryogenic Amplifiers
FT-ICR · Shot-Noise · QPC · STM/AFM
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We offer customized cryogenic amplifiers e.g. for STM/AFM applications, FT-ICR ion traps and
QPC measurements. Our cryogenic low noise amplifiers are developed with focus on small
shot noise signals.
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Dual Cryogenic Amplifier HFC 50
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Our latest device, the HFC 50 (please click images to enlarge) is a low noise cryogenic amplifier
for the 0.3 to 40MHz range. It has been developed with special focus on shot noise,
tunneling current and QPC measurements at liquid Helium temperature.
It features
- 2 channels with good channel matching
- low noise
- small size
- and high input impedance (1MOhm)
The device has been developed in close collaboration with a
 University group
for low temperature shot noise measurements on quantum point contacts beyond
the 1/f noise kink in the noise spectra.
For more details please refer to the data sheet:
 pdf, 1.24 MB
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NexGen3 KC 05 du V.09 module
The NexGen3 KC 05 du V.09 module comprises 2 highly sensitive voltage
preamplifier channels, and is intended for lowtemperature,
low-noise applications. The circuit can be used directly inside a cryogenic vacuum setup.
GaAs (Gallium-Arsenide)-FET technology allows for operation in strong magnetic fields up to several
Tesla, as they are present in NMR, FT-ICR or solid state research applications. Featuring two
independent channels, the amplifier module covers a frequency range of 10kHz....3MHz and has very
high input impedance, ideally suited for sensing induced image currents or semiconductor noise
measurements.
The module is delivered as printboard-stack with aluminium lids. Bias- and signal lines can be
connected by normal soft-soldering procedures by the user.
The device version V.09 (Version 2009) supersedes the former version KC 05 and features a smaller
case size, lowered voltage- and current noise and a further increased input impedance.
The usable temperature range covers the whole span from room temperature (300K) to liquid Helium
temperature (4.2K).
For more details please refer to the data sheet:
pdf, 1.14 MB
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Cryogenic Amplifier & Biasing Module A3-5b
The "A3-5b" amplifier unit consists of three main blocks, which are useful to operate
cryogenic preamplifiers, especially our NexGen3-Series amplifiers e.g. the NexGen3 KC 05 du V.09. The supply section feeds a cryogenic device with energy,
another section provides low noise post-amplification of the signals coming from the
cryogenic stage. The third section allows monitoring the biasing conditions (DC values)
and assists to analyse possible malfunctions in the cryogenic region, which is often
helpful, since the cold parts are usually difficult to access because they are located in
vacuum or inside a liquid Helium can.
The device is housed inside a shielded aluminium case, which needs to be powered up
by an external +/-5V supply.
For more details please refer to the data sheet:
pdf, 2.34 MB
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Customized single channel version of our NexGen3 amplifiers
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Picture:
single channel version NexGen3 KC05c
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Our 3rd generation drift-compensated GaAs-preamplifier shows outstanding noise performance
and versatility.
For more details please refer to the short form data sheet:
pdf, 280 KB
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