Power and temperature detection circuit and earphone
A technology of temperature detection circuit and electric quantity detection, applied in thermometer, measurement of electrical variables, application of thermometer, etc., can solve the problems of high cost and disadvantageous circuit miniaturization, etc.
Active Publication Date: 2021-02-12
NANJING ZGMICRO CO LTD
View PDF5 Cites 0 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
In the implementation of the prior art, two sets of circuits are required to detect the battery power and battery temperature respectively, which requires high cost and is not conducive to the miniaturization of the circuit.
Method used
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View moreImage
Smart Image Click on the blue labels to locate them in the text.
Smart ImageViewing Examples
Examples
Experimental program
Comparison scheme
Effect test
Embodiment Construction
[0023] In order to make the above objects, features and advantages of the present invention more comprehensible, the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.
[0024] Reference herein to "one embodiment" or "an embodiment" refers to a particular feature, structure or characteristic that can be included in at least one implementation of the present invention. "In one embodiment" appearing in different places in this specification does not all refer to the same embodiment, nor is it a separate or selective embodiment that is mutually exclusive with other embodiments.
[0025] The present invention proposes an improved power and temperature detection circuit, which does not need to use two sets of detection circuits and two analog-to-digital converters, and only uses one digital-to-analog converter to realize power detection and temperature detection at the same time, which is low in cost an...
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More PUM
Login to View More Abstract
The present invention provides a power and temperature detection circuit and earphones. The power and temperature detection circuit includes a power detection terminal, a temperature detection terminal, a processor, a detection input gating circuit, a basic reference voltage gating circuit, a counter, and a digital-to-analog conversion Adder, Adder, Comparator. When the processor needs to perform power detection, each circuit module can jointly operate as a power detection circuit, and after the counter stops counting, the processor can obtain the power detection value based on the current count value read. When the processor needs to perform temperature detection, each circuit module can jointly operate as a temperature detection circuit, and after the counter stops counting, the processor can obtain the temperature detection value based on the current count value read. In this way, there is no need to use two sets of detection circuits, but only one set of detection circuits can realize power detection and temperature detection at the same time, which is low in cost and conducive to miniaturization.
Description
【Technical field】 [0001] The invention relates to the field of circuit design, in particular to an earphone and a new electric power and temperature detection circuit arranged in the earphone. 【Background technique】 [0002] Lithium batteries are generally required in Bluetooth headsets, and their power needs to be displayed. In addition, the temperature of the batteries needs to be monitored to ensure battery safety. In the prior art, two sets of analog-to-digital converters are used to detect battery power and battery temperature respectively, which will increase the cost. [0003] Existing techniques such as figure 1 shown. Such as figure 1 As shown, BAT1 is a lithium battery, R11 is a resistor with a fixed resistance value, Rntc is a temperature sensitive resistor with a negative temperature coefficient, which is used to detect the temperature of the battery, and the fuel gauge contains an analog-to-digital converter for detecting the power detection terminal VBAT1 T...
Claims
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More Application Information
Patent Timeline
Login to View More Patent Type & Authority Patents(China)
IPC IPC(8): G01R31/36G01K13/00G01K7/22
Inventor 王钊
Owner NANJING ZGMICRO CO LTD