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Interface unit coupled to auxiliary device, mobile device and method thereof

A technology of interface unit and auxiliary equipment, which is applied in the direction of branch office equipment, electrical components, instruments, etc., and can solve problems such as interruption of digital data communication

Active Publication Date: 2020-12-04
QUALCOMM INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the presence of FB may interrupt the communication of digital data between the mobile device and auxiliary devices such as headsets

Method used

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  • Interface unit coupled to auxiliary device, mobile device and method thereof
  • Interface unit coupled to auxiliary device, mobile device and method thereof
  • Interface unit coupled to auxiliary device, mobile device and method thereof

Examples

Experimental program
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Embodiment Construction

[0015] As explained above, the presence of the ferrite bead (FB) interrupts digital data communication between the mobile device and an accessory coupled to the mobile device. Accordingly, there is a need for a scheme for providing uninterrupted digital data communication between a mobile device and an auxiliary device in the presence of interfering elements, such as ferrite beads. One approach is to bypass FB with a switch that offers relatively low on-resistance (eg, less than 1Ω to maintain low dropout voltage) while also providing relatively low off-capacitance (eg, less than 20pF) to maintain FM sensitivity. However, switches with such tight specifications are relatively expensive. Therefore, a new design for mobile devices includes two sets of relatively low-cost switches, one set for data communication, which bypasses the FB, and the other set for power transmission.

[0016] After reading this specification it will become apparent that the disclosure can be practiced ...

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PUM

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Abstract

An interface unit for a mobile device coupled to an auxiliary device, the interface unit comprising: a first plurality of switches configured for power delivery to the auxiliary device; at least one isolation unit coupled to the first plurality of switches, at least one an isolation unit configured to isolate a plurality of signals and prevent interruption of data communication between the mobile device and the auxiliary device; and a second plurality of switches configured for data communication between the mobile device and the auxiliary device, the second plurality of The switch is configured to bypass at least one isolation unit.

Description

technical field [0001] Embodiments of the present disclosure relate generally to mobile devices having multiple communication capabilities, and more particularly to interface units of mobile devices. Background technique [0002] Mobile devices can provide a variety of communication capabilities, including digital data communication between the mobile device and auxiliary devices coupled to the mobile device. In one example, the auxiliary device may be a headset. The various communication capabilities may also include frequency modulation (FM) radio operation using a connected headset as an antenna (eg, a long cord connecting the headset to the mobile device as the antenna). Thus, the ground of the headset can be coupled to the FM receiver residing on the mobile device. [0003] Mobile devices with FM receivers may require Ferrite Beads (FB) or Radio Frequency Chokes (RFC) to isolate the FM signal and ensure the sensitivity of the FM receiver. However, the presence of the...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04B1/3805
CPCG06F13/4022G06F13/4068H04B1/3805H04M1/0202
Inventor M·亚津V·达纳塞卡兰H-y·L·尼尔森B·S·古斯塔维森P·J·谢
Owner QUALCOMM INC
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