Colby Matthew Keith

US Patent:

20090224776, Sep 10, 2009

Filed:

Mar 4, 2008

Appl. No.:

12/042217

Inventors:

Colby KEITH - Santa Clara CA, US

Assignee:

SYNAPTICS INCORPORATED - Santa Clara CA

International Classification:

G01R 27/26

US Classification:

324686

Abstract:

A touch sensor device and method is provided that determines measurable capacitances for object detection. The systems and methods measure capacitance by controllably transferring charge from a storage capacitor, and determining the measurable capacitance by measuring the residual voltage remaining on the storage capacitor after the transfer. The systems and methods thus provide an accurate determination of the measurable capacitance that can be used for object proximity sensing.

US Patent:

20130271193, Oct 17, 2013

Filed:

Jun 25, 2012

Appl. No.:

13/532241

Inventors:

Colby Keith - Santa Clara CA, US

Assignee:

INTERSIL AMERICAS LLC - Milpitas CA

International Classification:

H03L 7/08

US Classification:

327158

Abstract:

A delay locked loop (DLL) includes a phase detector (PD), a lock assistor (LA), a control voltage generator, and a voltage controlled delay line (VCDL). The PD determines a phase difference between of a reference clock and a delayed version of the reference clock and produces a pair of phase detector output signals in dependence on the determined phase difference. The LA receives the pair of phase detector output signals and produces a pair of lock assist output signals by selectively swapping the phase detector output signals. The control voltage generator receives the pair of lock assist output signals and produces a control voltage signal in dependence on thereon. The VCDL receives the control voltage signal and the reference clock (or a buffered version thereof) and outputs the delayed version of the reference clock, with a delay through the VCDL being dependent on the received control voltage signal.