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On-chip inductor with audio headphone amplifier

A source voltage, converter technology, used in audio amplifiers, low frequency amplifiers, inductors, etc., can solve the problem of switch mode power converters that cannot be switched

Pending Publication Date: 2022-07-15
CIRRUS LOGIC INT SEMICON
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, a disadvantage of many implementations of this type of topology is that the switch-mode power converter cannot switch with sufficient bandwidth to effectively track the output signal driven by the linear amplifier across the entire audio bandwidth

Method used

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  • On-chip inductor with audio headphone amplifier
  • On-chip inductor with audio headphone amplifier
  • On-chip inductor with audio headphone amplifier

Examples

Experimental program
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Embodiment Construction

[0013] figure 1 is an illustration of an exemplary mobile device 1 according to an embodiment of the present disclosure. figure 1 The mobile device 1 is depicted coupled to a headset 3 in the form of a pair of earbud speakers 8A and 8B. figure 1 The headset 3 depicted in is merely an example, and it will be appreciated that the mobile device 1 may be used in connection with a variety of audio transducers, including but not limited to headphones, earbuds, in-ear headphones, and external speakers. The plug 4 may provide electrical terminals for connecting the headset 3 to the mobile device 1 . The mobile device 1 may provide a display to the user and receive user input using the touch screen 2, or alternatively, a standard liquid crystal display (LCD) may be combined with various buttons, sliders, and / or sliders provided on the surface and / or sides of the mobile device 1 and / or dial combination. Also as figure 1 As shown, the mobile device 1 may include an audio integrated c...

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PUM

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Abstract

A single integrated circuit (9) may comprise: a signal path configured to generate an output signal (VOUT) from an input signal (VIN), where the signal path comprises an amplifier (16) configured to drive the output signal (VOUT); a direct current-direct current (DC-DC) power converter (10) having a power inductor integrated in a single integrated circuit (9) and configured to generate a supply voltage (VSUPPLY) from the source voltage to the DC-DC power converter (10) to the amplifier; and a control circuit for controlling operation of a converter switch of the DC-DC power converter (10) such that the supply voltage (VSUPPLY) tracks at least one of the input signal (VIN) and the output signal (VOUT).

Description

technical field [0001] The present disclosure relates generally to circuits for audio devices, including but not limited to personal audio devices, such as wireless phones and media players, and more particularly to systems and methods related to on-chip inductors with audio headphone amplifiers. Background technique [0002] Mobile devices, including wireless phones such as mobile / cellular phones, cordless phones, mp3 players and other consumer audio devices, are in widespread use. Such mobile devices may include circuitry for driving transducers, including but not limited to earphones, speakers, linear resonant actuators or other vibration actuators, and / or any other suitable transducers. [0003] In many audio systems, linear amplifiers can drive transducers, and such linear amplifiers can be powered by a variable supply voltage that tracks the envelope of the output signal driven by the linear amplifier to the transducer. For example, power supplies used to implement su...

Claims

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Application Information

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IPC IPC(8): H03F1/02H03F3/187H02M3/156
CPCH02M1/0054H02M3/158H03F1/0227H03F1/0238H03F3/187H03F2200/03H03F2200/321H01L28/10Y02B70/10H03F1/0272H01L23/5227
Inventor 约翰·L·梅兰森朱磊沈威信费晓凡约翰·G·加博里欧
Owner CIRRUS LOGIC INT SEMICON
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