PA120A

• Bandwidth: DC-1.5MHz
• Slew-Rate: 250V/µs
• Load current: > 10A_P
• Offset: < 3mV
• Sophisticated limiting and protection concept

 
Applications

• Research
• Development (in particular power electronics)
• Pulse physics
• Component testing
• Quality assurance
• Measurement and test engineering

 
PA120A is a high speed DC-coupled power amplifier featuring power bandwidth of 1.5MHz.

The output stage of PA120A provides output voltages ranging from -30V to +30V, whereas load currents of ±4A and peak load currents up to ±10A are available.

The amplifier comes with two input channels; their signals are added together. This allows e.g. for providing an AC-signal with a DC-offset. Another example would be superimposing of the wanted signal by a disturbing signal. Input resistance (50Ω / 10kΩ) as well as coupling mode (AC / GND / DC) and gain (x1 / x10) can be set for each input channel separately.

LED indicators at the inputs (LIMIT + / LIMIT -) signalise overmodulation of the input stage.

The power output stage is protected against overload and overtemperature.
The supply voltage of the output stage is varied depending on junction temperature of its transistors (Tj LIMIT + / Tj LIMIT -). This method allows for achieving high output currents even at small output voltages.

Monitoring of the junction temperature also makes a fast current limitation unnecessary, thus allowing for very high peak output currents (> 10A). If either the junction temperature exceeds 125°C (Tj OVER) or the maximum heatsink temperature is exceeded (Ths OVER), the output of the amplifier will be disconnected.

If the output voltage level exceeds its positive or negative limit, the appropriate output limit indicator LED lights up (LIMIT + / LIMIT -). The output voltage will be then reduced, preventing overmodulation of the power output stage.