Patent ID: 7773015
Filing Date: 2010-08-10
Classification: H03M

Abstract:
1. A multi-channel measurement data acquisition apparatus comprising: at least one analog input assembly having a plurality of analog inputs, each of said plurality of analog inputs associated with an individual channel of a plurality of channels; a controllable electronic analog signal switch device; and a central controllable analog-digital converter, wherein the plurality of channels associated with the plurality of analog inputs are configured to be successively switched through by the controllable electronic analog signal switch device so that analog signals received at the analog inputs of the individual channels are successively applied as input signals to the central controllable analog-digital converter, and wherein the controllable electronic analog signal switch device and/or the central controllable analog-digital converter have control inputs connected to associated control lines; wherein a supply voltage of the at least one analog input assembly, the control lines of the controllable electronic analog signal switch device and of the central controllable analog-digital converter, and an output of the central controllable analog-digital converter are respectively galvanically decoupled from ground so that after an analog signal is switched through to the central controllable analog-digital converter the at least one analog input assembly assumes ground reference of the switched-through analog signal.