Invention Grant
- Patent Title: High current low-cost DC coupled DAC follower low pass filter headphone amplifier
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Application No.: US15606211Application Date: 2017-05-26
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Publication No.: US10141898B2Publication Date: 2018-11-27
- Inventor: Sebastiaan de Vries
- Applicant: Tymphany HK Limited
- Applicant Address: CN Hong Kong
- Assignee: TYMPHANY HK LIMITED
- Current Assignee: TYMPHANY HK LIMITED
- Current Assignee Address: CN Hong Kong
- Agency: Cantor Colburn LLP
- Main IPC: H03F1/56
- IPC: H03F1/56 ; H03F3/183 ; H03F3/45 ; H04R3/00 ; H03F1/32 ; H03F3/185 ; H03F1/02 ; H03F1/08 ; H03F3/08 ; H03F3/60 ; H04R5/033 ; H04R5/04 ; H03F3/187 ; H03F3/68

Abstract:
A digital-to-analog converter (DAC) circuit includes a pair of output stages, each including a DAC configured to convert a digital audio signal into an analog audio signal. A low-pass filter circuit includes an operational amplifier in signal communication with the DAC. The operation amplifier generates a filtered analog signal based on the analog audio signal. An amplifier network generates an amplified audio signal based on the filtered analog signal. The operational amplifier includes a feedback circuit path including a first node connected to the output of the amplifier network and a second node connected to the input of the operational amplifier. The amplifier network is electrically nested in the feedback circuit path.
Public/Granted literature
- US20170347195A1 HIGH CURRENT LOW-COST DC COUPLED DAC FOLLOWER LOW PASS FILTER HEADPHONE AMPLIFIER Public/Granted day:2017-11-30
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