Current-to-voltage converters with dynamic feedback
AssigneeBaker Hughes Incorporated
InventorsStanislav W. Forgang, Luis M. Pelegri
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Abstract
An apparatus for modifying an output signal indicative of a downhole parameter that may include a carrier conveyable in a wellbore; a negative error compensator; and an output signal device. The negative error compensator may be configured to modify the output of the device to increase or decrease a characteristic of the output signal from the output signal device. Also, a method for modifying an output signal indicative of a downhole parameter that may include modifying a characteristic of an output signal produced by a output signal device in a wellbore using a negative error compensator.
Claims18
An apparatus for modifying an output signal indicative of a downhole parameter, comprising:
- a carrier conveyable in a wellbore in an earth formation;
- an output signal device disposed on the carrier, the device configured to produce the output signal;
- a negative error compensator in communication with the output signal device, the negative error compensator configured to dynamically modify, responsive to the output signal, a characteristic of the same output signal;
- wherein the output signal device comprises a current-to-voltage converter
- wherein the current-to-voltage converter comprises an amplification module having a non-inverting input and an inverting input, and wherein the negative error compensator dynamically modifies the potential difference between the inverting and non-inverting inputs of the current-to-voltage converter to be closer to zero.
A method for modifying an output signal indicative of a downhole parameter, comprising:
- using a negative error compensator to dynamically modify, responsive to the output signal, a characteristic of the same output signal produced by an output signal device in a wellbore
- wherein the output signal device comprises a current-to-voltage converter
- wherein the current-to-voltage converter comprises an amplification module having a non-inverting input and an inverting input, and wherein the negative error compensator dynamically modifies the potential difference between the inverting and non-inverting inputs of the current-to-voltage converter to be closer to zero.
Dependencies are inferred from the claim text.