Cypress Semiconductor Corporation

Silicon Light Machines Corporation

Parade Technologies, Ltd.

Kevin J Gallagher

Hans Klein

Denis Ellis

Daniel O'Keeffe

Gerald Donal Murphy

Andrew J Walker

Anthony G Dunne

Bruce E Byrkett

Marc D Hartranft

Michael J Duewake

An apparatus includes a reconfigurable charge pump including charge pump cells configurable into multiple different arrangements. The apparatus includes a control device configured to select a first arrangement of the charge pump cells from the multiple different arrangements based, at least in part, on an input voltage received by the reconfigurable charge pump and requested parameters of a drive signal for a touch screen panel. The reconfigurable charge pump can boost the input voltage based, at least in part, on the first arrangement of the charge pump cells. The control device can generate the drive signal according to the requested parameters based on the boosted input voltage.

Reconfigurable charge pump

A circuit for generating a voltage is disclosed. The voltage has an amplitude greater than an available power supply. The circuit includes a driver to supply the voltage on an output terminal to an electrode of a touch sense array. The circuit also includes a charge pump array coupled to the driver. The charge pump array includes an array of charge pumps to supply an input voltage to the driver. The circuit also includes a feedback circuit coupled to the charge pump array. The feedback circuit is configured to measure the input voltage and to select different combinations of the array of charge pumps to maintain the voltage on the output terminal.

Circuit to provide signal to sense array

An apparatus includes a charge pump array including multiple charge pump cells. The charge pump array is configurable into a first arrangement of the charge pump cells coupled in series or a second arrangement of the charge pump cells coupled in parallel. The apparatus can include reconfiguration circuitry configured to select the first arrangement of the charge pump cells or the second arrangement of the charge pump cells. The charge pump array is configured to alter a voltage level of a signal based, at least in part, on the selected arrangement of the charge pump cells.

One example of an ESD protection circuit () can include a p-channel field effect transistor (PFET) () having a source-drain path connected between a pad () and a protected circuit (). In an ESD event, PFET () can provide an ESD discharge path between pad () and a high power supply node () or low power supply node ().

Electrostatic discharge (ESD) circuit and method that includes P-channel device in signal path

An architecture and method are provided for preventing snapdown in a voltage controlled MEMS device having a movable actuator with an actuator electrode coupled to a high voltage power supply (HVPS) through a drive circuit, the movable actuator suspended over a cavity electrode formed on a substrate and coupled to a common backplane supply (VssC). Generally, the circuit includes a number of first diodes coupled between the HVPS and the actuator electrode and/or the cavity electrode to provide a forward-biased path to transfer a positive charge to the HVPS when the accumulated charge exceeds a predetermined threshold. Preferably, the drive circuit further includes second diodes to provide a low impedance path to transfer a positives charge from the actuator electrode and/or the cavity electrode to a substrate ground when the accumulated charge results in or exceeds a predetermined threshold voltage. Other embodiments are also disclosed.

Snapdown prevention in voltage controlled MEMS devices

The present invention concerns an apparatus comprising a first circuit and a second circuit. The first circuit may be configured to generate a reference output voltage in response to a plurality of reference voltages. The second circuit may be configured to generate an output voltage in response to the reference output voltage and an unknown voltage. The output voltage may comprise accurately controlled hysteresis.

Reference -switch hysteresis for comparator applications

An apparatus comprising a first circuit and a second circuit. The first circuit may be configured to regulate an output voltage generated in response to an input signal and a feedback of the output voltage. The second circuit may be configured to further regulate the output voltage in response to the input signal.

Feed-forward control for DC-DC converters

An apparatus comprising an output connected to a plurality of inputs through a tree of connections. Each of one or more branches of the tree may be equidistant between the output and each of the plurality of inputs.

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Co. Cork, Ireland

Kevin J Gallagher