31 Jan 2014 HVA-Series: True DC-coupled voltage amplifiers with zero output offset
The series manufactured by FEMTO Messtechnik GmbH is available with bandwidths to suit specific requirements avoiding the addition of unnecessary wideband noise, 10MHz, 200MHz and 500MHz.
True DC-Coupling is extremely important for accurate pulse amplification and analysis especially when different pulse lengths for example digital codes or transients with durations in the micro- to millisecond time-scale. The DC component is related to the average signal, from for example the duty cycle, if this changes to, for example 1:100 then the baseline would shift by 1% and with the HVA-Series this can now be measured and compensated for.
If the amplifier is AC coupled or has a large output offset to be de-coupled by the AC setting of the oscilloscope there will be significant undershoots and baseline shifts in the measurements. Therefore, all HVA Amplifiers offer a true DC coupling and an adjustable output offset control.
Low input noise is very important for a good signal-to-noise ratio, especially when amplifying small signals. All HVA-Series amplifiers are optimised for minimum input noise reaching excellent values as low as 0.9 nV/√Hz.
HSA-Series: When DC-coupling is unimportant and a fast response of >500MHz is essential
If a true DC coupled amplifier is required and measured bandwidth is >100MHz in general we suggest the HSA-Series GHz amplifier series, with unrivalled voltage noise of 670 pV/√Hz for the ultra-wide bandwidth response range of 10kHz to 2GHz.
For more information visit our website at
http://www.lasercomponents.com/uk/product/wideband-series-hva/
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