Very low noise amplifier

Kurzfassung

A German freelance development engineer offers an amplifier (procedure and electronic circuit) for high-precision measurement of small signals at very low noise. It can be used for thermal analysis with thermocouples. The amplifier combines simple technology and low-cost manufacturing. The engineer is looking for companies with small-scale as well as with large-scale demand. Analogue hardware can get ordered, know-how may be transferred.

Details

When small voltages are to be measured with high precision at DC or at low frequencies there is a need to use amplifiers with low noise at high gain. A typical application is the measurement of temperatures with thermocouples. An even more challenging application is thermo-analysis, where important information must get filtered out of the gradients of the amplified signals.
Comparable applications can be found in all sciences where high resolutions of the amplified signals are called for. As noise of usual amplifiers reduces the resolution of analogue signals, there is a need for special technologies to save the resolution of the original signal fed into the input of the amplifier.
The innovation identifies the main noise source and realises the reduction of elimination.
Its technical data as well as the economic advantages suggest the replacing of chopper amplifiers by the new product in ambitious tasks.

Innovative Aspects:
The prevailing technology to minimise noise is the chopper amplifier. Its manufacturing requires high competence and expense, its technical performance is limited to noise values that can get reached or even exceeded by operational amplifiers nowadays; even though large efforts are to be done for selections.
A comparison between the chopper C 101 M, which has been the leading product till today, and the first issue type FBF-01 of the innovation shows the following typical dates at Gain = 100

TypeLimiting frequency/kHzNoise/nV
C 101 M2,5 50
FBF-0120 25

The technology may be applied in the same way as an operational amplifier. The staff skilled to use Ops needs no additional knowledge.
To interested companies with small or middle demand there are offered complete products (Module FBF-01) with DIL (Direct Inward Line) pinning and the geometrical dimensions 30 x 30 x 15 mm³.
To interested companies with large-scale demand there is an offer for licenses.
On special demand noise values of 20 nV at G = 100 can get realised.
There is a high flexibility in all aspects of the innovation to create individual solutions.