Invention Grant
- Patent Title: Audio amplifier with integrated filter
-
Application No.: US16584327Application Date: 2019-09-26
-
Publication No.: US10938357B2Publication Date: 2021-03-02
- Inventor: Owen Jones
- Applicant: THX LTD.
- Applicant Address: US CA San Fransisco
- Assignee: THX LTD.
- Current Assignee: THX LTD.
- Current Assignee Address: US CA San Fransisco
- Agency: Schwabe, Williamson & Wyatt, P.C.
- Main IPC: H03F3/68
- IPC: H03F3/68 ; H03F3/183 ; H03F3/45 ; H03H7/01 ; H03M1/66 ; H03G3/30

Abstract:
Embodiments provide an audio amplifier circuit with integrated (built-in) filter (e.g., a digital-to-analog converter (DAC) filter). The audio amplifier circuit may have a non-flat (e.g., low-pass) closed loop frequency response. The audio amplifier circuit may include a low pass filter coupled between an input terminal that receives the input analog audio signal and the input of the gain stage of the amplifier. In some embodiments, additional impedance networks may be included to produce a desired low-pass filter response, such as a second order filter, a third order filter, and/or another suitable filter response. Other embodiments may be described and/or claimed.
Public/Granted literature
- US1650314A Dir Public/Granted day:1927-11-22
Information query