Laser cutting quality is more sensitive to the driving signal than many engineers expect. Aigtek's ATA-1000 series wide band amplifier is specified around one specific finding: higher AC driving frequency reduces burr formation on the cut surface, which means the amplifier's available bandwidth directly affects cut quality, not just cut speed.
Why Frequency Affects Burr Formation
In laser cutting systems using AC-driven components (such as certain beam modulation or assist-gas control mechanisms), a higher drive frequency produces cleaner, more consistent cutting action with less burr left on the cut edge. This makes the amplifier's bandwidth a genuine cut-quality parameter, not just a speed parameter — which is why the ATA-1000 series is built for wideband performance up to 25MHz rather than optimised purely for power.
The Three Models
| Model | Bandwidth | Voltage | Current | Power |
|---|---|---|---|---|
| ATA-1220E | DC~21MHz | 60Vp-p (±30Vp) | 1Ap | 30W |
| ATA-1372A | DC~3MHz | 70Vp-p (±35Vp) | 2Ap | 70Wp |
| ATA-1200C | DC~25MHz | 30Vp-p (±15Vp) | 1Ap | 15W |
The ATA-1200C reaches the highest bandwidth in the series at the lowest voltage and power; the ATA-1372A trades bandwidth for higher voltage and current where a stronger drive signal matters more than frequency headroom. Whichever model you choose, the adjustable input/output resistance shared across the series (50Ω or 1MΩ input, matched output) lets it interface directly with standard signal generator outputs without an external matching network.
Beyond Laser Cutting
The same wideband, general-purpose design that suits laser cutting drive signals also fits any application needing lossless amplification well beyond the audio range — ultrasonic transducer excitation, RF-adjacent sensor driving, and general wideband circuit test all draw on the same bandwidth and impedance-matching capability.
Finch Electronic Solutions — Melbourne, Australia
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