Fast High-Voltage Linear Power Amp Circuit
The Apex PB50 Booster Amplifier is designed for high-voltage applications, enabling the amplification of low-level analog signals to significantly higher voltage levels. The integration of an operational amplifier (op-amp) allows for precise control and manipulation of the input signal, ensuring that the output accurately reflects the desired characteristics of the input.
In the described circuit, the operational amplifier is responsible for processing the input signal, which may come from various sources such as sensors or transducers. The op-amp amplifies this signal before it reaches the PB50 booster amplifier. The PB50 then further amplifies the signal, stepping it up to a high voltage output suitable for driving specific types of loads, such as capacitive or resistive loads.
The output voltage of 180 V peak-to-peak is particularly useful in applications that require significant signal strength, such as driving high-power RF amplifiers or providing bias voltages for photomultiplier tubes. The 90-ohm load specification indicates that the circuit is designed to match the impedance of the load, ensuring maximum power transfer and minimizing signal reflections.
Powering the circuit with a 100-V supply provides sufficient headroom for the PB50 to operate effectively, allowing it to reach the desired output voltage without distortion. Careful consideration must be given to the power supply design to ensure stability and low noise, which are critical for maintaining signal integrity in high-voltage applications.
Thermal management is also a crucial aspect of the design, as both the op-amp and the booster amplifier will generate heat during operation. Adequate heat sinking and ventilation should be implemented to prevent thermal runaway and ensure reliable long-term performance.
Overall, this configuration demonstrates the capability of combining a booster amplifier with an operational amplifier to achieve high-voltage signal amplification, suitable for various demanding electronic applications. An Apex PB50 Booster Amplifier, plus an IC op amp, can be used in a high-voltage op amp that converts a small analog signal to a 180-V p-p signal.Apex Microtechnology manufactures a number of power op amps. The above circuit uses a PB50 booster amplifier to deliver a 180-V p-p signal into a 90- load, from a 100-V supply.
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