本帖最后由 Divingbear 于 2016-6-2 18:08 编辑

BTL (bridge-tied load) — an output configuration for power amplifiers, used mainly in audio applications.
The load (for example, a speaker) is connected between two amplifier outputs, bridging the two output
terminals. This can double the voltage swing at the load (compared with SE amplifier operation) if the
outputs are driven in opposite phases.
SE (single-ended) — signaling that is the simplest method of transmitting electrical signals over wires.
One wire carries a varying voltage that represents the signal, while the other wire is connected to a
reference voltage, usually ground. The alternative to single-ended output configuration is the bridge-tied
load (BTL) configuration. SE signaling is less expensive to implement; however the signal cannot be
transmitted over long distances or quickly, it has poorer low-frequency response, and a smaller voltage
swing (compared to the BTL amplifier operation).