Measurement circuit and operation method therefor

The patent applies dynamics by making the circuit configuration changeable through switching elements. The circuit can dynamically switch between different connection states: one state connects the thermistor in the voltage divider for temperature detection, while another state connects a fixed reference resistor for voltage calibration. This dynamic reconfiguration allows the same circuit to perform multiple functions at different times, resolving the contradiction between temperature detection and voltage calibration.

The patent segments the measurement function by separating temperature detection and voltage calibration into distinct operational modes. Instead of attempting to perform both functions simultaneously with a single fixed circuit configuration, the circuit is divided into different functional states that are activated sequentially through control signals, allowing each function to be performed with the appropriate circuit configuration.

The patent extends the temperature monitoring range by dynamically switching between different resistor configurations. At different temperature ranges, different resistors are connected to the voltage divider circuit through switching elements. This allows the circuit to maintain accurate measurements across a wide temperature range while keeping the overall circuit structure relatively simple, as the same basic voltage divider topology is reused with different resistor selections.

The patent makes the voltage divider circuit universal by enabling it to handle multiple temperature ranges and perform multiple functions (temperature detection, voltage calibration, floating state detection) using the same basic circuit structure. The switching elements allow the circuit to adapt its configuration based on the required function or temperature range, increasing versatility without requiring completely separate circuits for each function.

The patent reduces circuit complexity by designing a multi-functional voltage divider circuit that performs temperature detection, voltage calibration, and floating state detection using a single unified structure. The same voltage divider core circuit is used for all functions, with switching elements that route different resistors to the same measurement node. This universal approach avoids the need for separate dedicated circuits for each function, thereby limiting the increase in overall complexity.

The patent merges multiple functions (temperature detection, voltage calibration, floating state detection) into a single integrated circuit module. By combining these functions that share common circuit elements and using the same voltage divider infrastructure for multiple purposes, the patent reduces the total number of independent circuit blocks required, thereby limiting complexity growth despite the added versatility.