Variable gain current-to-voltage amplifier with gain independent test mode operation
The patent describes a precision current-to-voltage amplifier having a normal amplification mode wherein an input current is amplified by an adjustable gain to produce an output voltage corresponding thereto and also having a test mode wherein the output voltage is independent of the normal amplification gain. It comprises: an active component; a first switch means connected between the input current and the active component; a first adjustable amplification means connected in an amplifier configuration to the active component; a test input divider connected to the output voltage such that the adjustable amplification means is connected to the output voltage through a portion of the test input divider; and a second switch means connected between a test input and the test input divider. The second switch means and the first switch means not both being closed at the same time.
- Assignee:
- Westinghouse Electric Corp., Pittsburgh, PA
- Patent Number(s):
- US 4896118; A
- Application Number:
- PPN: US 7-262846A
- OSTI ID:
- 6923995
- Country of Publication:
- United States
- Language:
- English
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