- Patent Title: High-order passive filter with capacitive inner tapping technique
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Application No.: US18461303Application Date: 2023-09-05
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Publication No.: US12009796B2Publication Date: 2024-06-11
- Inventor: Ahmed F. Aref Mahmoud
- Applicant: Apple Inc.
- Applicant Address: US CA Cupertino
- Assignee: Apple Inc.
- Current Assignee: Apple Inc.
- Current Assignee Address: US CA Cupertino
- Agency: Kowert, Hood, Munyon, Rankin & Goetzel, P.C.
- Agent Dean M. Munyon
- Main IPC: H03H7/01
- IPC: H03H7/01 ; H01F21/12 ; H03H7/09 ; H03H7/42

Abstract:
A high-order filter with a capacitive inner tapping technique is disclosed. The filter includes an inductor and a first resonant circuit including a first portion of the inductor and a first capacitor. The first resonant circuit is configured to attenuate first frequency components of an input signal above a cutoff frequency to generate a filtered signal. The filter further includes a second resonant circuit coupled in parallel with the first resonant circuit and including the first portion of the inductor and a second capacitor. The second resonant circuit is configured to attenuate the first frequency components of the input signal to generate the filtered signal. A third resonant circuit includes a second portion of the inductor and a third capacitor, wherein the third resonant circuit is configured to attenuate second frequency components of the filtered signal above the cutoff frequency to generate an output signal.
Public/Granted literature
- US20240063769A1 High-Order Passive Filter with Capacitive Inner Tapping Technique Public/Granted day:2024-02-22
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