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PDFA bridged amplifier is the result of taking two bridgeable amplifiers and using two of their channels (one from each) to drive a common load. Essentially, a bridged amplifier will cut the total number of channels in half, but double the power of each channel. This results in two amplifiers working together as one to double what would be their individual output power.
Amplifiers can be bridged in two different ways, parallel or series. Parallel bridging doubles the current in the channel, whereas series bridging will double the voltage.
Bridging amplifiers are most commonly used in audio applications.
Additional Information:
Wikipedia.com: Bridged and Paralleled Amplifiers
Refer to the RF & Communications Resources page for additional information about RF terminology, fundamentals, and National Instruments RF products.
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