Invention Application
- Patent Title: SYSTEMS AND METHODS FOR IMPEDANCE STABILIZATION
- Patent Title (中): 阻尼稳定的系统和方法
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Application No.: US13893239Application Date: 2013-05-13
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Publication No.: US20130250640A1Publication Date: 2013-09-26
- Inventor: Brian Land , Steve P. Hotelling , Gus Pabon , Benjamin B. Lyon
- Applicant: Apple Inc.
- Applicant Address: US CA Cupertino
- Assignee: Apple Inc.
- Current Assignee: Apple Inc.
- Current Assignee Address: US CA Cupertino
- Main IPC: H02M7/04
- IPC: H02M7/04

Abstract:
a An AC-to-DC adapter may be provided in order to increase the sensitivity of a touch-sensitive surface. Such an AC-to-DC adapter may include a rectifying circuit to rectify incoming AC signals. The rectifying circuit may take the form of a diode bridge network that includes four diode branches. Stabilization circuits may be provided in parallel with each diode branch in order to decrease the impedance of the diode bridge network during particular periods of operation. The stabilization circuits may be configured such that the impedance of the diode bridge network is substantially constant during all periods of operation. As a result, the impedance of the AC-to-DC adapter may be relatively constant during all periods of operation. In turn, the sensitivity of a touch-sensitive surface of a device being powered by such an AC-to-DC adapter may increase.
Public/Granted literature
- US09325253B2 Systems and methods for impedance stabilization Public/Granted day:2016-04-26
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