Apparatus, system and method for high resolution identification with temperature dependent resistive device
First Claim
1. 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 a detection port 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:
- a translation circuit, operatively coupled to the detection port, 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 a clamped voltage resulting from the voltage clamping network limiting the voltage; and
a controller, operatively coupled to the translation circuit, for determining the identification value based on the normalized identification voltage.
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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.
22 Citations
15 Claims
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1. 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 a detection port 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, operatively coupled to the detection port, 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 a clamped voltage resulting from the voltage clamping network limiting the voltage; and a controller, operatively coupled to the translation circuit, for determining the identification value based on the normalized identification voltage. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
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Specification