Current-voltage converter for measuring appts. - has parallel electronic circuit paths acting as voltage divider and regulated voltage divider with centre tap-offs providing positive and negative output voltage nodes

摘要

The current/voltage converter allows a live-zero signal current (IE) to be converted into a non-live-zero signal voltage (Ua) with a constant offset for the signal voltage range. It has an electronic circuit with two parallel signal paths (3,4) receiving the signal current (IE) via a branch connection; one signal path (3) acting as a voltage divider and the other as a regulated voltage divider. The regulator (8) for the latter branch (4) is coupled to a centre tap-off (9) of the first signal path (3). A third voltage divider signal path (5) across the branch connection nodes (6,7) has a centre tap-off (11) providing the positive input voltage node (11), the negative output voltage node (10) provided by the centre tap-off of the regulated voltage divider. ADVANTAGE - Circuit operates without auxiliary voltage source.