| 摘要 |
<p>A microphone power supply (10) for use with precision microphones having an attached pre-amplifier, connects to an analyzer (12) with a coaxial cable (14) and is powered by an ICP current source (13) in the analyzer. The power supply provides a polarization voltage and a pre-amplifier power voltage to a microphone and pre-amplifier assembly (20). The power supply receives an AC audio signal produced by the microphone, buffers the AC signal, and provides the AC signal to the analyzer through the coaxial cable. <IMAGE></p> |
