100/200MHz Broadband Voltage Amplifier

Features

Bandwidth DC to 200

Fixed or variable gain up to 40 dB

Noise as low as 1.2 nV/√Hz

True DC-coupled, switchable to AC

50 Ω bipolar or 1 MΩ FET input stage

Up to 40 dB gain, 1.2 nV/√Hz input noise

For optimal signal-to-noise ratio performance, select an amplifier with sufficient bandwidth corresponding to the desired signal bandwidth. However, note that unnecessarily high bandwidth introduces more broadband noise. Therefore, FEMTO offers HVA voltage amplifiers with three different upper cutoff frequencies to meet various measurement needs. Like all FEMTO adjustable gain amplifiers, bandwidth remains constant when switching between different gain settings, which is crucial for measuring fast signals and pulses.

True DC-coupled, zero output offset

True DC coupling is essential for precise pulse amplification and analysis, especially when dealing with varying pulse lengths (such as digital codes or transients lasting from microseconds to milliseconds). If the amplifier is AC-coupled or has a significant output offset that requires decoupling through the oscilloscope's AC setting, the measurement results will exhibit noticeable undershoot and baseline drift. Therefore, all HVA amplifiers provide true DC coupling and adjustable output offset control, even the 500 MHz models.

Output impedance 50 Ω. Offset adjustable via trim potentiometer. Output short-circuit protection. Device includes matching connectors. Optional PS-15 power supply available.