Systems and methods for detection of load impedance of a transducer device coupled to an audio device
A load impedance, transducer technology, applied in transducer circuits, audio amplifiers, amplifiers with impedance circuits, etc., can solve problems such as low power efficiency, and achieve the effect of eliminating shortcomings and problems
Active Publication Date: 2016-10-26
CIRRUS LOGIC INC
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However, because the worst case is assumed in this approach, when no worst case exists (for example, the load impedance is different from the worst case load impedance), the supply voltage provided by the charge pump supply in some modes may be higher than that provided by The voltage required for sufficient voltage margin is much higher, resulting in power inefficiency
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[0031] figure 1 An exemplary personal audio device 1 is shown according to an embodiment of the present disclosure. figure 1 A personal audio device 1 is shown coupled to a headset 3 in the form of a pair of earbud speakers 8A and 8B. figure 1 The headset 3 is shown by way of example only, and it should be understood that the personal audio device 1 can be used with a variety of audio transducers, including but not limited to headphones, earbuds, earphones, and external speakers. The plug 4 can connect the headset 3 to the electrical terminals of the personal audio device 1 . The personal audio device 1 may provide a display to the user and use the touch screen 2 to receive user input, or alternatively, a standard LCD may interface with various buttons, sliders and / or Dial combination. Such as figure 1 Also shown in , the personal audio device 1 may include an audio integrated circuit (IC) 9 for generating an analog audio signal that is transmitted to the headset 3 and / or ...
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In accordance with systems and methods of the present disclosure, an audio device may include an electrical terminal, an audio circuit, and a transducer load detection circuit. The electrical terminal may couple a transducer device to the audio device. The audio circuit may generate an analog audio signal, wherein the analog audio signal is coupled to the electrical terminal. The transducer load detection circuit may detect a load impedance of the transducer device when the transducer device is coupled to the audio device from characteristics measured at the electrical terminal.
Description
[0001] related application [0002] This disclosure claims priority to U.S. Nonprovisional Patent Application Serial No. 14 / 036682, filed September 25, 2013, which is U.S. Nonprovisional Patent Application Serial No. 14, filed September 25, 2013 / 036136, U.S. Nonprovisional Patent Application 14 / 036136 claims priority to U.S. Provisional Patent Application Serial No. 61 / 878138, filed September 16, 2013, all three of which are incorporated herein by reference in their entirety. [0003] This disclosure claims priority to U.S. Nonprovisional Patent Application Serial No. 14 / 031287, filed September 19, 2013, which claims priority to U.S. Provisional Patent Application Serial No. 61 / , filed September 16, 2013. 878138, the above two applications are incorporated herein by reference in their entirety. technical field [0004] The present disclosure relates generally to circuitry of personal audio devices, such as wireless phones and media players, and more particularly, to systems ...
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IPC IPC(8): H03F1/02G01R31/28H03F1/52H03F3/181H03F3/183H04R3/00
CPCH03F1/0211H03F3/181H03F3/52G10K2210/1081G10K2210/30232G10K2210/3045G10K2210/3049H03F1/0227H03F1/52H03F3/183H04R5/04G10K11/17881G10K11/17854G10K11/17885H04R2420/05H03F2200/03H03F1/0233H04R29/001H03F3/185H03F2200/462H03F2200/471H04R3/007
Inventor 阿南德·易兰革丹尼尔·约翰·艾伦维维克·金达尔阿尼鲁达·萨托斯卡B·K·桑德里
Owner CIRRUS LOGIC INC