Multi-range platinum resistor temperature measurement circuit and method
A technology of temperature measurement circuit and platinum resistance, which is applied to thermometers, thermometers, and measuring devices that use electric/magnetic elements that are directly sensitive to heat.
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[0034] The present invention will be described in detail below in conjunction with the specific embodiments shown in the accompanying drawings, but these embodiments do not limit the present invention, those of ordinary skill in the art make structural, method, or functional changes based on these embodiments All are included in the scope of protection of the present invention.
[0035] Such as figure 1 with figure 2 A multi-range platinum resistance temperature measuring circuit is shown, which includes a constant current source 1, a single-pole double-throw switch 2, a reference circuit, a circuit to be tested, a temperature measuring chip 10 and a microcontroller 11;
[0036] The constant current source 1 provides a constant and the same current signal for the reference circuit and the circuit to be tested through the single-pole double-throw switch 2. The temperature measurement chip 10 has two input terminals and one reference input terminal, and is connected to the mic...
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