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bidirectional current sensor

A bidirectional current, sensor circuit technology, applied in the direction of only measuring current, electric solid device, current indicating direction, etc., can solve the problem of current sensor power consumption and other issues

Active Publication Date: 2018-07-17
ANALOG DEVICES INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, resistor-based current sensors can dissipate a significant amount of power and can introduce unnecessary resistance in the circuit path

Method used

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Embodiment Construction

[0016] A bidirectional current sensor circuit may be configured to provide a voltage signal or a current signal indicative of one or more characteristics of the load current. For example, a current sensor circuit can provide information about the frequency, magnitude, polarity, or phase of the load current. The current sensor circuit can be configured to consume a minimum amount of power from the load current to reduce power loss and loading effects. In one example, the current sensor circuit can be configured to provide an output signal substantially proportional to the load current.

[0017] Certain devices can operate with current signals having different characteristics, such as different magnitudes or polarities. For example, a thermoelectric heating or cooling device (TEC) may be configured to transfer heat at a first rate in a first direction in response to a current signal having a first magnitude and a first polarity, and the TEC may be configured to respond to Heat...

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Abstract

The bidirectional current sensor circuit may be configured to generate a scaled version of the load current using a first transistor of a power regulator output stage and a second transistor that is a mirrored or scaled version of the first transistor. Trim circuitry may be provided to correct for gain errors under current sinking or current initiated regulation. In one example, a bidirectional current sensor circuit can be configured to detect the polarity or magnitude of a current signal used to operate the thermoelectric element.

Description

technical field [0001] This document generally relates, but not by way of limitation, to circuits configured to provide information about the polarity or magnitude of an electrical signal. Background technique [0002] A current sensor circuit may include one or more circuit elements arranged to detect a current and provide a corresponding output signal, such as an output voltage signal. In one embodiment, the current sensor circuit can be configured to provide an output voltage signal that is proportional to the detected or measured current signal. Current sensor circuits can be optimized to detect different ranges of current signal amplitude or frequency, or to operate under different environmental conditions. [0003] An example of a current sensor may include a resistor configured as a current-to-voltage converter. According to Ohm's law V=IR, a current I passes through a resistor R to generate a voltage V. Thus, the resistor provides a substantially linear voltage re...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01R19/04G01R19/14G05D23/19
CPCG01R19/14G05F3/262H01L23/38H01L2924/0002H01L2924/00G01R19/0092
Inventor H·L·超P·A·布鲁考
Owner ANALOG DEVICES INC