| 摘要 |
A signal conditioning circuit having an input stage that receives inputs from at least one pair of conductors and processes the input signal through an input filter and a buffer amplifier. Each input filter and buffer amplifier are powered by independent power sources whose power return reference potentials are independently determined by the potential of the corresponding input signal potential reference conductor. The outputs of the buffer amplifiers, the power return reference potentials, and the power return reference potential of the conditioning circuit output are all appropriately added or subtracted in an output stage. The output stage consists of an amplifier buffer having low output impedance which is powered by a separate independent power source whose power return reference potential is independently determined by the potential of the output signal reference conductor. The output of this circuit stage is connected to an output inductor circuit which in turn drives the output signal conductor. The output stage further includes a filter which is designed to maintain stability and reject external influences on the output of the output amplifier buffer. The invention also includes means that connect the reference potential of the destination of the output conductors to the system power ground potential. The invention also applies to arrays of such signal conditioning apparatus.
|
