| US 7,538,539 B1 | ||
| Current meter with reduced range switching and load transients | ||
| Christian Balke, Munich (Germany) | ||
| Assigned to Teradyne, Inc., North Reading, Mass. (US) | ||
| Filed on May 08, 2008, as Appl. No. 12/117,034. | ||
| Int. Cl. G01R 15/08 (2006.01) | ||
| U.S. Cl. 324—115 [324/123 R; 324/126] | 26 Claims |
| 1. A circuit for measuring current to a load, comprising:
an output node for coupling to the load;
an amplifier having an output, a first power supply node, and a second power supply node;
a first current measuring circuit, coupled to the first and second power supply nodes of the amplifier and having an output
for providing a first indication of current to the load; and
a second current measuring circuit, coupled between the output of the amplifier and the output node and having an output for
providing a second indication of current to the load.
|