公开(公告)号：EP4344059A1

公开(公告)日：2024-03-27

申请号：EP22306381.9

申请日：2022-09-21

申请人： NXP B.V.

发明人： Geffroy, Vincent

IPC分类号： H03F1/52 ,  H03F3/45 ,  G05F1/56

摘要： An error amplifier including a differential pair circuit, a resistive device, a low voltage capacitor, and a protection device. The differential pair circuit is coupled between an upper supply node and a lower supply node with first and second intermediate nodes and is responsive to a difference between a reference voltage and a feedback voltage for driving a control voltage developed on the second intermediate node. The resistive device is coupled between the second intermediate node and a low voltage node, and the low voltage capacitor and the protection device are coupled between the low voltage node and the lower supply node. The protection device is dynamically controlled by the first intermediate node to prevent the low voltage node from exceeding a predetermined maximum level. The protection device may be a transistor having size parameters based on voltage characteristics of the first intermediate node during expected operating conditions.

公开(公告)号：EP4428663A1

公开(公告)日：2024-09-11

申请号：EP23305301.6

申请日：2023-03-07

申请人： NXP B.V.

发明人： Goussin, Franck ,  Darthenay, Frederic ,  Tourret, Jean-Robert ,  Geffroy, Vincent

IPC分类号： G06F3/041 ,  G06F3/044

CPC分类号： G06F3/04166 ,  G06F3/0446

摘要： A touch panel system that includes drivers for providing detection signals on a first plurality of electrodes of a touch panel where each detection signal includes one or more frequency signal components with each frequency signal component having a frequency and at least three phase offsets for at least one frequency of the frequency signal components. Each detection signal has a unique frequency-phase offset combination of the one or more frequency signal components. The unique combinations allow for the determination of a touch at specific locations on the panel by sensing signals on a second set of electrodes.

公开(公告)号：EP4428662A1

公开(公告)日：2024-09-11

申请号：EP23305300.8

申请日：2023-03-07

申请人： NXP B.V.

发明人： Darthenay, Frederic ,  Tourret, Jean-Robert ,  Goussin, Franck ,  Geffroy, Vincent

IPC分类号： G06F3/041 ,  G06F3/044

CPC分类号： G06F3/04166 ,  G06F3/0446

摘要： A touch panel includes a first plurality of electrodes and a second plurality of electrodes. A plurality of transmitters generate a plurality of transmit signals by modulating a common sine wave signal with a set of orthogonal modulation signals, and drive each transmit signal onto a corresponding electrode of the first plurality of electrodes. Each transmit signal is generated by modulating the common sine wave signal with a unique orthogonal modulation signal of the set of orthogonal modulation signals. At least two of the plurality of transmit signals are not orthogonal. Each receiver of a plurality of receivers senses a receive signal on a corresponding electrode of the second plurality of electrodes and generates a set of correlation signals by correlating the receive signal with each transmit signal of the plurality of transmit signals. The sets of correlation signals are used to detect a touch event on the touch panel.