Invention Grant
- Patent Title: Tone detector
- Patent Title (中): 音色检测器
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Application No.: US11810507Application Date: 2007-06-05
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Publication No.: US08379838B2Publication Date: 2013-02-19
- Inventor: Amit Burstein
- Applicant: Amit Burstein
- Applicant Address: US MA Woburn
- Assignee: Skyworks Solutions, Inc.
- Current Assignee: Skyworks Solutions, Inc.
- Current Assignee Address: US MA Woburn
- Agency: Weide & Miller, Ltd.
- Main IPC: H04M1/00
- IPC: H04M1/00

Abstract:
A tone detector is disclosed that is realizable in digital embodiment on a single integrated circuit die and does not require external components, such as a discrete capacitor. An input connects to a comparator, which in turn connects to one or more edge detectors and a flip flop. The edge detector outputs a pulse responsive to a detected edge. A counter is reset by the pulses from the edge detectors thereby preventing the counter from reaching a maximum value, which would otherwise be output from the counter and provided to a flip flop to clock in the comparator output at the D input to the flip flop. In operation, the comparator generates a rail to rail signal responsive to a received tone, which in turn is clocked through the flip flop as a logic high output indicating presence of a tone.
Public/Granted literature
- US20080303555A1 Tone detector Public/Granted day:2008-12-11
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