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Bluetooth circuit

A circuit and bluetooth technology, applied in transducer circuits, electronic circuit testing, measuring electricity, etc., can solve the problem of high OTP voltage, and achieve the effect of helping miniaturization and reducing the number of chip pins

Active Publication Date: 2018-06-29
NANJING ZGMICRO CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Generally, when the temperature of the battery core is too high, the resistance value of Rntc is too small, causing the voltage of OTP to be higher than the protection threshold

Method used

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  • Bluetooth circuit
  • Bluetooth circuit
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Embodiment Construction

[0021] 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.

[0022] 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. Unless otherwise specified, the words connected, connected, and joined in this document mean that they are electrically connected directly or indirectly.

[0023] Please refer to figure 2 As shown, it is a schematic circuit diagram of a Bluetooth circuit in an embodiment of the present invention, which can multiplex an input...

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PUM

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Abstract

The invention provides a Bluetooth circuit comprising a Bluetooth chip with an input pin OTP_RST, a crash reset switch, a first voltage terminal, a second voltage terminal, a first resistor and a second resistor, wherein the first resistor and the second resistor are connected in series between the second voltage terminal and a ground terminal, a connection node between the first resistor and thesecond resistor is called as an intermediate node, and the intermediate node is connected with the input pin OTP_RST; one end of the crash reset switch is connected with the first voltage terminal, and the other end of the same is connected with the input pin OTP_RST; and the Bluetooth chip judges whether to start crash reset based on the voltage of the input pin OTP_RST, and judges whether the Bluetooth chip is in an over-temperature state based on the voltage of the input pin OTP_RST. Compared with the prior art, the Bluetooth circuit can share the input pin to perform battery cell temperature detection and crash reset, so that the number of the chip pins is reduced, and the miniaturization of the chip and the system is facilitated.

Description

【Technical field】 [0001] The invention relates to the technical field of electronic circuits, in particular to a bluetooth circuit with shared input pins for temperature detection and crash reset. 【Background technique】 [0002] High-quality Bluetooth headsets and Bluetooth speaker systems require both a crash reset function and a battery temperature detection function. In traditional designs, the crash reset function requires an input pin, and the battery temperature detection function requires another input pin. [0003] Please refer to figure 1 As shown, it is a schematic circuit diagram of a bluetooth circuit with temperature detection function and crash reset function in the prior art. It can be seen that the bluetooth chip (Bluetooth Chipset) 110 needs two pins to realize crash reset and battery temperature detection. Features. Among them, the RST pin is used to realize the crash reset function; the OTP pin is used to realize the battery temperature detection functio...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04R3/00H04R29/00G01R31/28G06K9/00H04B5/00
CPCH04R3/00H04R29/00G01R31/282G06V40/172H04B5/00
Inventor 王钊
Owner NANJING ZGMICRO CO LTD