Temperature calculation parameter providing circuit, temperature calculation parameter providing method and temperature monitoring method
A technology for calculating parameters and circuits, which is applied in the field of providing circuits for temperature calculation parameters, can solve problems such as calculation errors, increase complexity, and reduce temperature monitoring action speed, and achieve the effect of reducing bandwidth and complexity
Active Publication Date: 2021-12-21
REALTEK SEMICON CORP
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Problems solved by technology
[0003] However, known temperature monitoring systems have some disadvantages
For example, the conventional temperature monitoring system will need the sensed voltage value of the speaker, the sensed current value and the temperature of some components of the temperature monitoring system or the speaker to monitor the temperature, so more transmitting and receiving terminals (such as pins) are required. bit) to transmit and receive the sensing voltage value, sensing current value, and temperature, which will increase the area of the integrated circuit and the complexity of related wiring
In addition, the transmission and reception of the sensed voltage value, sensed current value, and temperature must be synchronized, otherwise errors in subsequent calculations will occur
Moreover, the conventional temperature monitoring system must calculate the temperature of the voice coil according to three parameters, which increases the complexity of the calculation, and the transmission of the temperature will also occupy the bandwidth of the data transmission, reducing the speed of the temperature monitoring action
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[0029] The content of the present invention will be described below with multiple embodiments. However, please note that under the premise of maintaining the same function, the components in each embodiment can be divided into more components or integrated into fewer components. In addition, the following embodiments are described by sensing the temperature of the speaker voice coil as an example, but the content provided by the present invention can be applied to any target electronic device that has a resistance value that varies with temperature. The target electronic device can include a single A component (such as a resistor) or a plurality of components.
[0030] figure 1 A block diagram of a circuit for providing temperature calculation parameters according to an embodiment of the invention is shown. Such as figure 1 As shown, the speaker SP includes a voice coil, and the voice coil resistance Rv is the equivalent resistance of the voice coil. Since the voice coil c...
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A temperature calculation parameter supply circuit for generating a sensing voltage value and a correction voltage value as a temperature calculation parameter of a target electronic device, comprising: a parameter calculation circuit for calculating a reference voltage to generate a reference voltage value, The reference voltage is a cross-voltage of a reference resistor connected in series with the target electronic device, and the sensing voltage of a cross-voltage of the target electronic device is calculated to generate the sensing voltage values; a reference temperature sensing circuit is used to sense a current reference temperature of the reference resistor; and a calibration circuit for calibrating the reference voltage values according to a calibration function and the current reference temperature to generate the calibration voltage values. The correction function corresponds to a resistance temperature change function of the reference resistor.
Description
technical field [0001] The present invention relates to a circuit for providing temperature calculation parameters, a method for providing temperature calculation parameters, and a method for monitoring temperature, and particularly relates to a circuit for providing temperature calculation parameters, a method for providing temperature calculation parameters, and a method for temperature monitoring that can immediately correct voltage changes caused by temperature. Background technique [0002] The volume of modern electronic devices is getting smaller and smaller, so the volume of speakers in the electronic devices is also getting smaller and smaller correspondingly. However, in a state where the volume becomes smaller, the loudspeaker still needs to have a certain degree of performance, so its power (such as its operating voltage or operating current) is often adjusted higher. In order to prevent the voice coil in the speaker from being damaged due to high temperature cau...
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IPC IPC(8): G01K7/18
CPCG01K7/18
Inventor 陈信豪杜益昌
Owner REALTEK SEMICON CORP