APPARATUS, SYSTEM AND METHOD FOR HIGH RESOLUTION IDENTIFICATION WITH TEMPERATURE DEPENDENT RESISTIVE DEVICE
First Claim
1. A voltage translation circuit comprising a detection port configured to connect to an identification device, of a plurality of identification devices, comprising a voltage clamping network connected in parallel with a temperature sensing element;
- when the identification device is connected to the detection port, the translation circuit further configured to;
present, at the detection port and in response to a first control signal level, an identification measuring voltage sufficiently high to invoke a clamping function of the clamping circuit;
present, at the detection port and in response to a second control signal level, a temperature measuring voltage sufficiently low to avoid invoking the voltage clamping function,present, at an output and in response to the first control signal level, a normalized voltage corresponding to a clamped voltage at the detection port and within normalization voltage range; and
present, at the output and in response to the second control signal level, a temperature measuring voltage within the normalized voltage range and corresponding to a temperature of the identification device.
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Accused Products
Abstract
A temperature measuring and identification (TMID) device obtains identification information and temperature information of a connected device having a temperature sensing circuit (TSC). The TSC includes a temperature sensing element (TSE) connected in parallel with a voltage clamping network (VCN) that limits the voltage across the TSE to an identification voltage within an identification voltage range when the voltage is greater than or equal to a lower voltage of the identification voltage range. When a voltage below the lower range is applied to the TSC, the VCN appears as an open circuit and the resistance of the TSC corresponds to temperature. A translation circuit within the TMID shifts TSC voltages within the identification voltage range to a normalization voltage range. Accordingly, voltages corresponding to temperature as well as voltages corresponding to identification are within the normalization voltage range. As a result, the resolution of a voltage sensing device used for measuring the temperature and identification voltages is maximized. In addition, the translation circuit maintains a minimal current during a rest state. For cost or other concerns, a first TSC may omit the VCN to provide a maximum identification voltage and other TSCs may include VCNs with lower identification voltage ranges.
34 Citations
18 Claims
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1. A voltage translation circuit comprising a detection port configured to connect to an identification device, of a plurality of identification devices, comprising a voltage clamping network connected in parallel with a temperature sensing element;
when the identification device is connected to the detection port, the translation circuit further configured to; present, at the detection port and in response to a first control signal level, an identification measuring voltage sufficiently high to invoke a clamping function of the clamping circuit; present, at the detection port and in response to a second control signal level, a temperature measuring voltage sufficiently low to avoid invoking the voltage clamping function, present, at an output and in response to the first control signal level, a normalized voltage corresponding to a clamped voltage at the detection port and within normalization voltage range; and present, at the output and in response to the second control signal level, a temperature measuring voltage within the normalized voltage range and corresponding to a temperature of the identification device. - View Dependent Claims (2, 3, 4, 5)
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6. A temperature measuring and identification (TMID) device comprising:
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a detection port configured to connect to an identification device of a plurality identification devices, the identification device comprising a voltage clamping network in parallel with a temperature sensing element; a translation circuit configured to provide; a normalized voltage within a normalization voltage range at a translation circuit output during an identification state, the normalized voltage corresponding to a clamped voltage at the detection port; and a temperature measuring voltage within the normalized voltage range at the translation circuit output, the temperature measuring voltage resulting from a current flowing through the temperature sensing element during a temperature measuring state; and an analog to digital converter (ADC) configured to convert an output voltage at the translation circuit output to generate a digital identification voltage during the identification state and to generate a digital temperature measuring voltage during the temperature measuring state; and a controller configured to determine an identification value of the identification device based on the digital identification state and to determine the temperature of the identification device based on the digital temperature measuring voltage. - View Dependent Claims (7, 8, 9, 10, 11, 12, 13, 14, 15)
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16. A temperature measuring and identification (TMID) device for determining an identification value and a temperature of an identification device comprising a voltage clamping network in parallel with a temperature sensing element, the voltage clamping network configured to limit a voltage at the connector to an identification voltage range when the voltage is greater than or equal to a lower voltage of the identification voltage range, the TMID device comprising:
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a translation circuit configured to shift the voltage to a normalized identification voltage within a temperature measuring voltage range during an identification state, the temperature measuring voltage range having an upper temperature measuring voltage less than the clamped voltage; and a controller for determining the identification value based on the normalized identification voltage. - View Dependent Claims (17, 18)
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Specification