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Driver Amplifiers

RF driver amplifiers raise an intermediate RF or microwave signal to the level needed by a following power amplifier, converter, modulator or test path. They sit between small-signal stages and higher-power output hardware.

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RF driver amplifier module
Transmitter Power Amplifier ChainA transmitter power amplifier chain raises a controlled RF or microwave drive signal to the output level required by an antenna, load or test interface.

FAQ

What should be compared before selecting an RF amplifier family?

Choose the RF amplifier family from its signal-chain role first; then compare band, gain, noise or linearity, output, waveform, interfaces and thermal limits under equivalent conditions.

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RF driver amplifiers

Driver amplifiers provide the controlled drive level between low-power RF stages and a following power device or subsystem. They are used when a signal source, converter or modulator cannot directly drive the next stage with enough margin, or when the transmit chain needs a stable gain block before the final PA.

What defines the driver stage

The driver stage is not the final output amplifier and it is not a receiver LNA. Its value is the usable drive power delivered with predictable gain, compression behavior and linearity. Output level, gain flatness, P1dB or compression margin, bias current, stability, thermal rise and interface impedance determine whether the following stage receives a clean and repeatable input.