Invention Grant
- Patent Title: System and method for detecting the presence and type of capacitive loads
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Application No.: US14440783Application Date: 2013-10-21
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Publication No.: US09857405B2Publication Date: 2018-01-02
- Inventor: Adrian Nastase , Manny DelValle
- Applicant: NEWPORT CORPORATION
- Applicant Address: US CA Irvine
- Assignee: Newport Corporation
- Current Assignee: Newport Corporation
- Current Assignee Address: US CA Irvine
- Agency: Loza & Loza, LLP
- Agent George Fountain
- International Application: PCT/US2013/065935 WO 20131021
- International Announcement: WO2014/074290 WO 20140515
- Main IPC: G01R27/26
- IPC: G01R27/26 ; H01L41/04 ; H02N2/14 ; G01R31/34

Abstract:
System and method for detecting the presence and type of capacitive load that may be coupled to a power driver. The system includes a detection circuit to determine the presence and type of load based on a measured characteristic of the load in response to a drive voltage. The characteristic may be the load capacitance as measured by the current flow between the driver and load. The circuit may include a differential amplifier to generate a current-related voltage, comparators to generate pulses when the voltage exceeds respective thresholds, registers to output logic levels in response to the comparators, and a microcontroller to make the determination based on the logic levels. Alternatively, the circuit includes a differential amplifier to generate a current-related voltage, a rectifier to rectify the voltage, a peak and hold circuit to hold the peak voltage, an ADC to digitize the peak voltage, and a microcontroller to make its determination based on the digitized voltage.
Public/Granted literature
- US20150301094A1 SYSTEM AND METHOD FOR DETECTING THE PRESENCE AND TYPE OF CAPACITIVE LOADS Public/Granted day:2015-10-22
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