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US 9,660,621 B1Granted
Large dynamic range analog signal conditioning method and device with active accuracy enhancement
AssigneeTechnology for Energy Corporation
InventorsKevin Christopher Omoumi, Allen Vaughn Blalock, Kai Bouse
Life of this patent
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Abstract
An analog signal conditioning device and method employing a multi-path feedback mechanism to actively minimize the error of the overall desired signal conditioning transfer function to produce a corrected output signal, initially and over temperature, by exploiting characteristics of resistances manufactured simultaneously on a common thermally conductive substrate.
Claims48
An active analog signal conditioning circuit comprising:
- an input signal node to receive an input signal;
- an output signal node to output an output signal;
- a reference signal node to output a reference signal;
- an error correction signal node to output an error correction signal;
- a forward module configured to condition and sum the input signal and the error correction signal to present the output signal at the output signal node such that the input signal is applied to a first forward sensitivity between the input signal node and the output signal node, and the error correction signal is applied to a second forward sensitivity between the error correction signal node and the output signal node;
- a reference module configured to condition and sum the output signal and the error correction signal to present the reference signal at the reference signal node such that the reference signal is inverted in sign to the output signal, the output signal is applied to a first reference sensitivity between the output signal node and the reference signal node, and the error correction signal is applied to a second reference sensitivity between the error correction signal node and the reference signal node;
- and
- a correcting comparison module configured to condition and sum the output signal and the reference signal to present the error correction signal at the error correction signal node such that the output signal is applied to a first comparison sensitivity between the output signal node and the error correction signal node, and the reference signal is applied to a second comparison sensitivity between the reference signal node and the error correction signal node;
- wherein the second forward sensitivity and the first and second reference sensitivities are configured such that error correction signal components of the reference signal from the respective first and second reference sensitivities are equal in magnitude and inverted in sign;
- and
- wherein the forward module and the reference module are configured to each include at least one passive element formed on a same first substrate.
8 more elements
A method of active analog signal conditioning, the method comprising:
- receiving an input signal at an input signal node;
- outputting an output signal as a conditioned signal to an output signal node;
- outputting a reference signal to a reference signal node;
- outputting an error correction signal to an error correction signal node;
- conditioning and summing the input signal and the error correction signal through a forward module to present the output signal at the output signal node by applying the input signal to a first forward sensitivity between the input signal node and the output signal node, and applying the error correction signal to a second forward sensitivity between the error correction signal node and the output signal node;
- conditioning and summing the output signal and the error correction signal through a reference module to present the reference signal at the reference signal node, such that the reference signal is inverted in sign to the output signal, by applying the output signal to a first reference sensitivity between the output signal node and the reference signal node, and applying the error correction signal to a second reference sensitivity between the error correction signal node and the reference signal node;
- and
- conditioning and summing the output signal and the reference signal through a correcting comparison module to present the error correction signal at the error correction signal node by applying the output signal to a first comparison sensitivity between the output signal node and the error correction signal node, and applying the reference signal to a second comparison sensitivity between the reference signal node and the error correction signal node;
- wherein the second forward sensitivity and the first and second reference sensitivities are configured such that error correction signal components of the reference signal from the respective first and second reference sensitivities are equal in magnitude and inverted in sign;
- and
- wherein the forward module and the reference module each include at least one passive element formed on a same first substrate.
8 more elements
Dependencies are inferred from the claim text.