Title:
METHOD FOR LIMITING AMPLIFIER INPUT CURRENT TO AVOID LOW VOLTAGE CONDITIONS
Document Type and Number:
WIPO Patent Application WO/2017/214149
Kind Code:
A3
Abstract:
A predictive brownout prevention system may be configured to prevent brownout of an audio output signal. Particularly, the brownout prevention system may be configured to receive information indicative of an amplitude of the audio input signal, receive information indicative of a condition of the power supply, receive information indicative of one or more of the following: 1) adaptive estimates of power supply conditions; 2) anticipated effects of power supply capacitance; and 3) condition of a load impedance, determine from the received information whether a brownout condition exists, and responsive to determining the brownout condition exists, generate the selectable attenuation signal to reduce an amplitude of the audio output signal such that the signal path attenuates the audio input signal or a derivative thereof in order to prevent brownout prior to propagation to the audio output of a portion of the audio input signal having the brownout condition.
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Inventors:
LAWRENCE JASON W (US)
AZRAI FIRAS (US)
AZRAI FIRAS (US)
Application Number:
PCT/US2017/036157
Publication Date:
February 15, 2018
Filing Date:
June 06, 2017
Export Citation:
Assignee:
CIRRUS LOGIC INT SEMICONDUCTOR LTD (GB)
SERWY ROGER (US)
SERWY ROGER (US)
International Classes:
H03G3/00; H03G3/30
Domestic Patent References:
| WO2016040177A1 | 2016-03-17 |
Foreign References:
| US20150263688A1 | 2015-09-17 | |||
| US20160126899A1 | 2016-05-05 | |||
| US20010048292A1 | 2001-12-06 |
Attorney, Agent or Firm:
PREWITT, Brian K. et al. (100 Congress AvenueSuite 110, Austin Texas, US)
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