Touch sensing display device

Abstract

A touch sensing display device includes: a first touch block including a plurality of first RX electrodes and a first TX electrode pattern dividing the plurality of first RX electrodes; a second touch block including a plurality of second RX electrodes and a second TX electrode pattern dividing the plurality of second RX electrodes; a TX driving circuit connected to the first TX electrode pattern through a first TX driving line and connected to the second TX electrode pattern through a second TX driving line; and an RX sensing circuit connected to the first RX electrodes and the second RX electrodes through a plurality of RX sensing lines, where each of the plurality of RX sensing lines is commonly connected to one of the plurality of first RX electrodes and one of the plurality of second RX electrodes.

Description

Technical Field

[0001] The present disclosure relates to a touch-sensing display device. Background Art

[0002] A touch-sensing display device includes a display panel including a touch sensor. Since the number of touch electrodes and touch lines increases as the size of the display panel increases, there is a limitation in that the production yield of the display panel decreases or the manufacturing cost increases.

[0003] Furthermore, in a multi-touch input in which a display panel is simultaneously touched by a finger and a stylus pen or two or more fingers, there may be a limitation in which a point that is not actually touched is abnormally recognized as a touched position due to a ghost phenomenon. Summary of the Invention

[0004] To overcome the above-mentioned limitations of the related art, the present disclosure may provide a touch sensing display device in which touch electrodes are connected to a touch sensing circuit in a multi-connection type to reduce the number of touch channels.

[0005] Furthermore, the present disclosure may provide a touch sensing display device that may sequentially sense touch electrodes connected to each other in a multi-connection type to reduce or prevent the occurrence of a ghost touch.

[0006] To achieve these and other advantages, and in accordance with the purposes of the present disclosure, as embodied and broadly described herein, a touch-sensing display device includes: a first touch block including a plurality of first RX electrodes and a first TX electrode pattern dividing the plurality of first RX electrodes; a second touch block including a plurality of second RX electrodes and a second TX electrode pattern dividing the plurality of second RX electrodes; a TX driving circuit connected to the first TX electrode pattern through a first TX driving line and to the second TX electrode pattern through a second TX driving line; and an RX sensing circuit connected to the first RX electrode and the second RX electrode through a plurality of RX sensing lines, wherein each of the plurality of RX sensing lines is commonly connected to one of the plurality of first RX electrodes and one of the plurality of second RX electrodes. BRIEF DESCRIPTION OF THE DRAWINGS

[0007] The accompanying drawings are included to provide a further understanding of the present disclosure and are incorporated in and constitute a part of this application. The drawings illustrate embodiments of the present disclosure and, together with the description, serve to explain the principles of the present disclosure. In the drawings:

[0008] Figure 1 is a diagram schematically illustrating a touch-sensing display device according to the present disclosure;

[0009] Figure 2 is a diagram illustrating an example of a touch sensing operation in a touch sensing display device;

[0010] Figure 3 is a diagram illustrating a separate connection type touch electrode array that can be included in a display panel in a comparative example;

[0011] Figure 4 is a diagram illustrating a multi-connection type touch electrode array that can be included in a display panel according to the present disclosure;

[0012] Figure 5 and Figure 6 is a diagram illustrating an example in which a touch electrode is divided into a TX electrode and an RX electrode for mutual touch sensing;

[0013] Figure 7 is a diagram illustrating a touch block driving signal for sequentially driving a multi-connection type touch electrode array in units of touch blocks;

[0014] Figure 8 is a diagram illustrating an example in which RX electrodes are connected to an RX sensing circuit in a multi-connection type; and

[0015] Figure 9 FIG. 4 is a diagram illustrating a waveform of a touch sensing result based on a touch block based on a touch block driving signal. DETAILED DESCRIPTION

[0016] Hereinafter, the present disclosure will be described more fully with reference to the accompanying drawings which illustrate exemplary embodiments of the present disclosure. However, the present disclosure may be embodied in many different forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided to make this disclosure thorough and complete and to fully convey the concepts of the present disclosure to those skilled in the art.

[0017] The advantages and features of the present disclosure and their implementation methods will be illustrated by the following embodiments described with reference to the accompanying drawings. However, the present disclosure can be implemented in different forms and should not be construed as limited to the embodiments set forth herein. Instead, these embodiments are provided to make the present disclosure thorough and complete and to fully convey the scope of the present disclosure to those skilled in the art. Furthermore, the present disclosure is limited only by the scope of the claims.

[0018] The shapes, sizes, ratios, angles, quantities, etc. disclosed in the drawings for describing the various embodiments of the present disclosure are merely exemplary, and the present disclosure is not limited thereto. Similar reference numerals always refer to similar elements. Throughout the specification, the same reference numerals are used to represent the same elements. When used herein, unless the term "only" is used, the terms "including," "having," "comprising," etc. imply that other components may be added. When used herein, unless the context clearly indicates otherwise, the singular forms "a," "an," and "the" are also intended to include the plural forms.

[0019] Even if not explicitly stated, elements in the various embodiments of the present disclosure should be construed as including a range of errors.

[0020] When describing a positional relationship, for example, when the positional relationship between two components is described as "on," "over," "below," and "beside," one or more other components may be disposed between the two components unless "just" or "directly" is used.

[0021] It will be understood that although the terms "first," "second," etc. may be used herein to describe various elements, these elements should not be limited by these terms. These terms are only used to distinguish one element from another. For example, a first element may be referred to as a second element, and similarly, a second element may be referred to as a first element without departing from the scope of this disclosure.

[0022] In the following description, when it is determined that the detailed description of related known functions or configurations unnecessarily obscures the main points of the present disclosure, the detailed description will be omitted or may be briefly provided. Hereinafter, embodiments of the present disclosure will be described in detail with reference to the accompanying drawings.

[0023] Figure 1 is a diagram schematically illustrating a touch-sensing display device 100 according to the present disclosure.

[0024] Reference Figure 1 , the touch-sensing display device 100 according to the present embodiment can provide a display function of reproducing an input image on its screen and a touch sensing function of sensing a user's touch input.

[0025] The touch-sensing display device 100 may include a display panel 110 in which data lines and gate lines are provided, and a display driving circuit 120 for driving the display panel 110 .

[0026] In terms of function, the display driving circuit 120 may include a data driving circuit for driving data lines, a gate driving circuit for driving gate lines, and a controller for controlling the data driving circuit and the gate driving circuit. The display driving circuit 120 may be implemented as one or more integrated circuits (ICs).

[0027] The touch sensing display device 100 may include a touch screen panel TSP in which a plurality of touch electrodes TE are provided for touch sensing, and a touch circuit 200 that performs driving and sensing processes of the touch screen panel TSP.

[0028] The touch screen panel TSP may be an external type in which the touch screen panel TSP is manufactured independently from the display panel 110 and bonded to the display panel 110, or may be an internal type in which the touch screen panel TSP is manufactured together with the display panel 110 in the manufacturing process and is disposed in the display panel 110. In the touch-sensing display device 100 according to the present disclosure, the touch screen panel TSP may be an independent panel including a touch sensing function, or may represent the display panel 110 having both a touch sensing function and a display function. Hereinafter, an internal type in which the touch screen panel TSP is located in the display panel 110 will be described as an example.

[0029] The touch circuit 200 can provide a touch drive signal to the display panel 110, can receive a touch sensing signal from the display panel 110, and can detect touch coordinates and the presence of a touch based on the touch sensing signal. The touch circuit 200 can be implemented as one element or two or more elements (e.g., an integrated circuit (IC)) and can be implemented independently of the display driver circuit 120. In addition, all or part of the touch circuit 200 can be integrated and implemented in the display driver circuit 120 or its internal circuits. For example, a portion of the touch circuit 200 can be implemented as an IC together with the data driver circuit of the display driver circuit 120.

[0030] The touch-sensing display device 100 may include a microcontroller unit (MCU) 150 that controls a touch circuit 200. The microcontroller unit 150 may be provided with a control synchronization signal Csync from a timing controller (TCON) 140, and may generate a touch synchronization signal Tsync for controlling the touch circuit 200 based on the control synchronization signal Csync.

[0031] Based on the interface defined between the touch circuit 200 and the micro control unit 150, the micro control unit 150 can transmit or receive the touch synchronization signal Tsync. The micro control unit 150 can be formed as one IC type together with the touch controller of the touch circuit 200, or can be implemented as one IC type together with the timing controller 140.

[0032] The touch-sensing display device 100 may include a timing controller (TCON) 140 that controls the display driving circuit 120 and the micro control unit 150. The timing controller 140 may be provided with a data signal Vdata of an input video and timing signals such as a vertical synchronization signal, a horizontal synchronization signal, a data enable signal, and a dot clock from a host system (not shown).

[0033] The timing controller 140 can control the gate drive timing of the display driving circuit 120 based on scan timing control signals such as a gate start pulse, a gate shift clock, and a gate output enable signal. In addition, the timing controller 140 can control the data drive timing of the display driving circuit 120 based on data timing control signals such as a source sampling clock and a source output enable signal.

[0034] The touch-sensing display device 100 may sense touch coordinates and whether a touch exists based on a capacitance difference occurring in the touch electrodes TE.

[0035] The touch-sensing display device 100 may be various types of devices such as a liquid crystal display (LCD) device, an organic light emitting display device, a plasma display panel, and a quantum dot display device.

[0036] For example, when the touch-sensing display device 100 according to an embodiment of the present disclosure is an LCD device, the plurality of touch electrodes TE may be provided in the display panel 110 and may be common electrodes to which a common voltage for display driving is applied.

[0037] Figure 2 is a diagram illustrating an example of a touch sensing operation in the touch sensing display device 100 according to the present disclosure.

[0038] Reference Figure 2 , the touch sensing display device 100 according to the present disclosure may include a plurality of touch electrodes TE performing a function of a touch sensor and a touch circuit 200 sequentially driving the plurality of touch electrodes TE to sense a touch input, thereby providing a touch sensing function.

[0039] The touch circuit 200 may sequentially perform driving and sensing of the plurality of touch electrodes TE in a touch sensing period in which touch sensing is performed, and thus, may sense whether there is a touch input and touch coordinates of a position to which the touch input is applied.

[0040] The touch circuit 200 can select at least one of the plurality of touch electrodes TE as a touch electrode TEs to be sensed, and can provide a touch block drive signal TDS to the selected touch electrode TEs. Subsequently, based on the touch sensing signal TSS received from the unselected touch electrode TEo and the selected touch electrode TEs, the touch circuit 200 can calculate the amount of change in capacitance (or amount of change in voltage or amount of change in charge voltage) of each touch electrode TE, can sense whether a touch input is present, and can calculate the touch coordinates of the location where the touch input is applied.

[0041] For example, the touch circuit 200 may include a touch sensing circuit 210 and a touch controller 220, the touch sensing circuit 210 supplies a touch block drive signal TDS to the display panel 110 and receives a touch sensing signal TSS from the touch electrodes TEs at positions corresponding to the touch block drive signal TDS, the touch controller 220 controls the generation of signals related to touch sensing, and performs touch processing of receiving the touch sensing signal TSS from the touch sensing circuit 210 to detect whether there is a touch and calculate the touch coordinates.

[0042] Here, a touch sensing period in which touch sensing is performed may be separated in time from a display driving period in which an image is displayed on the display panel 110, and may be performed simultaneously with the display driving period. In the touch sensing period, an alternating current (AC) signal having the same or substantially the same phase and amplitude as the touch block driving signal TDS may be supplied to the data lines and gate lines of the display panel 110, and thus, no-load driving for reducing the adverse effects of the parasitic capacitance of the touch electrode TE on the touch sensing result may be performed.

[0043] The size of the touch electrode TE provided in the display panel 110 may correspond to the area size of one sub-pixel, or may correspond to the area size of two or more sub-pixels. In addition, each touch electrode TE may be a plate type without an opening, or may be a grid type including one or more openings. For example, in the case where one touch electrode TE is a grid type and has a size corresponding to the area size of two or more sub-pixels, one touch electrode TE may include two or more openings, and the position and size of each of the two or more openings may correspond to the position and size of the light-emitting area of the corresponding sub-pixel.

[0044] Figure 3 is a diagram illustrating a separate connection type touch electrode array that can be included in the display panel 110 in a comparative example.

[0045] Reference Figure 3 In the separate connection type touch electrode array TEA according to the comparative example, each touch electrode TE can be individually connected to a touch line TL through a contact hole CNT. Multiple touch electrodes TE can be arranged in the active area. Depending on the situation, some of the multiple touch electrodes TE (for example, the outermost touch electrodes) can be arranged in the outer area (or external area) surrounding the active area, or can extend from the active area to the outer area. Here, the active area can be an area where an image is displayed, or it can be an area where touch sensing can be performed.

[0046] The plurality of touch lines TL may all be arranged to have the same or similar lengths from a point connected to the touch sensing circuit 210 to an opposite point. In each of the plurality of touch lines TL, only the position electrically connected to the corresponding touch electrode TE (i.e., the position of the contact hole CNT) may be changed.

[0047] As described above, in the touch electrode array TEA of the separate connection type, since one touch electrode TE should be electrically connected to one touch line TL, the number of touch lines TL may need to be equal to the number of touch electrodes TE. Here, the number of touch lines TL may correspond to the number of sensing channels for signal input / output of the touch sensing circuit 210. Figure 3 As shown, in the case where the touch electrode array TEA of the separation connection type is configured with 4*4 touch electrodes TE, sixteen touch lines TL respectively connected to the sixteen touch electrodes TE may be provided in the touch electrode array TEA, and therefore, sixteen touch channels may be required.

[0048] In other words, in the separate connection type touch electrode array TEA, the number of touch electrodes TE and the number of touch lines TL may increase as the size of the display panel 110 increases to ensure touch performance, and therefore, the manufacturing yield of the display panel may be low or the manufacturing cost may increase.

[0049] Figure 4 is a diagram illustrating a multi-connection type touch electrode array TEA that can be included in the display panel 110 according to the present disclosure. Figure 5 and Figure 6 is a diagram illustrating an example in which a touch electrode is divided into a TX electrode and a RX electrode for mutual touch sensing.

[0050] Reference Figures 4 to 6 According to the present disclosure, a multi-connection type touch electrode array TEA can be divided into a plurality of touch blocks TBLK1 to TBLKj (where j can be a natural number of 2 or greater), touch electrodes for mutual capacitance type touch sensing can be divided into TX electrodes and RX electrodes, and touch lines can be divided into TX drive lines TXL and RX sensing lines RXL. Each of the touch blocks may include one TX electrode pattern (one of TX1 to TXj) and k*i (where k and i can both be natural numbers) RX electrodes S11 to Ski.

[0051] The TX electrode pattern can be implemented as an integrated electrode or a mesh electrode pattern. Similarly, the RX electrode pattern can be implemented as an integrated electrode or a mesh electrode pattern.

[0052] The TX electrode patterns TX1 to TXj of the plurality of touch blocks TBLK1 to TBLKj may be connected to the TX driving circuit 210A through the TX driving line TXL, and the RX electrodes corresponding to the same row and column positions of each touch block may be connected to the RX sensing circuit 210B through one RX sensing line RXL.

[0053] For example, the RX electrode S11 at the 1*1 position of the touch blocks TBLK1 to TBLKj can be connected to the RX sensing circuit 210B through one RX sensing line RXL, and the RX electrode Ski at the k*i position of the touch blocks TBLK1 to TBLKj can be connected to the RX sensing circuit 210B through one RX sensing line RXL.

[0054] The number of TX driving lines TXL may be the same as or substantially the same as the number of touch blocks TBLK1 to TBLKj. The number of RX sensing lines RXL may be the same as or substantially the same as the number of RX electrodes S11 to Ski.

[0055] The number of TX channels of the TX driving circuit 210A connected to the TX driving line TXL may be the same as or substantially the same as the number of touch blocks TBLK1 to TBLKj. The number of RX channels of the RX sensing circuit 210B connected to the RX sensing line RXL may be the same as or substantially the same as the number of RX electrodes S11 to Ski. Therefore, this multi-connection type can be more Figure 3 The separation connection type more effectively reduces the number of touch channels.

[0056] In each touch block, the TX electrode pattern and the RX electrode may be arranged on the same or substantially the same plane. The TX electrode pattern may surround each of the RX electrodes on the same or substantially the same plane with a certain interval therebetween. In other words, the TX electrode pattern may surround each of the RX electrodes on the same or substantially the same plane with a certain interval therebetween.

[0057] For example, the first TX electrode pattern TX1 and the first RX electrodes S11 to Ski may be provided on the same or substantially the same plane in the first touch block TBLK1, and the second TX electrode pattern TX2 and the second RX electrodes S11 to Ski may be provided on the same or substantially the same plane in the second touch block TBLK2. The first TX electrode pattern TX1 may be formed to surround each of the first RX electrodes S11 to Ski with a certain interval therebetween on the same or substantially the same plane, and the second TX electrode pattern TX2 may be formed to surround each of the second RX electrodes S11 to Ski with a certain interval therebetween on the same or substantially the same plane.

[0058] In the same or substantially the same plane, the TX electrode pattern and each RX electrode may be coupled to each other via mutual capacitance CM. For example, the first TX electrode pattern TX1 and each of the first RX electrodes S11 to Ski may be coupled to each other via mutual capacitance CM in the first touch block TBLK1, and the second TX electrode pattern TX2 and each of the second RX electrodes S11 to Ski may be coupled to each other via mutual capacitance CM in the second touch block TBLK2.

[0059] In addition, in each touch block, the TX electrode pattern may be provided on a first plane, and the RX electrode pattern may be provided on a second plane different from the first plane. In this case, one or more insulating layers may be provided between the first plane and the second plane.

[0060] The mutual capacitance CM at a location where a finger touch CF is applied may decrease more than the mutual capacitance CM at a location where a finger touch is not applied. Due to this capacitance difference, a difference ΔQ may occur between the amount of charge sensed from the RX electrode at the touch location and the amount of charge sensed from the RX electrode at the non-touch location. The RX sensing circuit 210B may accumulate ΔQ in synchronization with the multi-pulse touch block drive signal, thereby obtaining a touch sensing value for calculating touch coordinates and the presence of a touch.

[0061] Figure 7 FIG. 1 is a diagram illustrating a touch block driving signal for sequentially driving a multi-connection type touch electrode array in units of touch blocks.

[0062] Reference Figure 7 The TX driving circuit 210A may drive the TX driving line TXL in a time-division manner. The TX driving circuit 210A may provide a first touch block driving signal TDS1 in a multi-pulse form to the first TX driving line during a first period, and may provide a second touch block driving signal TDS2 in a multi-pulse form to the second TX driving line during a second period after the first period.

[0063] The touch blocks TBLK1 to TBLKj can be sequentially activated in response to the touch block driving signals TDS1 to TDSj applied thereto by time division, and therefore, despite a multi-connection type in which the RX electrodes of the touch blocks TBLK1 to TBLKj are commonly connected to one RX sensing line RXL, an accurate touch input position can be sensed.

[0064] As described above, the present disclosure can reduce the number of touch channels by using a multi-connection type and can sequentially sense the touch blocks TBLK1 to TBLKj by using a time-division-based touch block drive signal, thereby reducing or preventing the occurrence of ghost touches. According to the present disclosure, even if there is a multi-touch input, the limitation of abnormally recognizing a point that is not actually touched as a touch position due to the ghost phenomenon will not occur.

[0065] Figure 8 is a diagram illustrating an example in which RX electrodes are connected to an RX sensing circuit in a multi-connection type.

[0066] Reference Figure 8 The RX sensing circuit 210B may include a channel multiplexer circuit CMUX and a sensing circuit SU. The sensing circuit SU may include a preamplifier circuit PAMP and an integrator INTG.

[0067] The channel multiplexer circuit CMUX can selectively connect the RX sensing line RXL to the input terminal of the preamplifier circuit PAMP. The channel multiplexer circuit CMUX can have a selection ratio of 1:M (where M can be a natural number of 2 or greater). The number of selection ratios of the channel multiplexer circuit CMUX can be the same as or different from the number of touch blocks.

[0068] The preamplifier circuit PAMP may receive charges charged in the RX electrode through the RX sensing line RXL and amplify the charges.

[0069] The integrator INTG may be connected to an output terminal of the preamplifier circuit PAMP. The integrator INTG may integrate the charge amplified by the preamplifier circuit PAMP in synchronization with the touch block driving signal in the form of a multi-pulse and may accumulate the integrated charge.

[0070] Figure 9 FIG. 4 is a diagram illustrating a waveform of a touch sensing result based on a touch block based on a touch block driving signal.

[0071] Reference Figure 9 , a touch sensing operation may be performed in a low logic period L of the touch synchronization signal Tsync, and a display operation may be performed in a high logic period H of the touch synchronization signal Tsync.

[0072] In one frame period, each of the high logic period H and the low logic period L of the touch sync signal Tsync may be allocated to one or more.

[0073] When a touch input is applied to the first touch block TBLK1 and a touch input is not applied to the second touch block TBLK2 , the integrator output value of the second touch block TBLK2 may be higher than the integrator output value (or touch sensing value) of the first touch block TBLK1 by ΔQ.

[0074] The present disclosure can achieve the following effects.

[0075] The present disclosure may connect the touch electrodes to the touch sensing circuit in a multi-connection type to reduce the number of touch channels.

[0076] Furthermore, the present disclosure may sequentially sense touch electrodes connected to each other in a multi-connection type to reduce or prevent the occurrence of ghost touches.

[0077] Effects according to the present disclosure are not limited to the above-described examples, and other various effects may be included in the specification.

[0078] While the present disclosure has been particularly shown and described with reference to exemplary embodiments thereof, it will be understood by those skilled in the art that various changes in form and details may be made in the present disclosure without departing from the technical concept and scope of the present disclosure as defined by the appended claims.

[0079] CROSS-REFERENCE TO RELATED APPLICATIONS

[0080] This application claims the benefit of Korean Patent Application No. 10-2024-0022549, filed in Korea on February 16, 2024, which is hereby incorporated by reference as if fully set forth herein.

Claims

1. A touch-sensing display device, comprising: a first touch block configured to include a plurality of first RX electrodes and a first TX electrode pattern dividing the plurality of first RX electrodes; a second touch block configured to include a plurality of second RX electrodes and a second TX electrode pattern dividing the plurality of second RX electrodes; a TX driving circuit connected to the first TX electrode pattern through a first TX driving line and connected to the second TX electrode pattern through a second TX driving line; as well as an RX sensing circuit connected to the first RX electrode and the second RX electrode through a plurality of RX sensing lines, Each of the plurality of RX sensing lines is connected to one of the plurality of first RX electrodes and one of the plurality of second RX electrodes.

2. The touch-sensing display device according to claim 1, wherein: The first TX electrode pattern and the plurality of first RX electrodes are arranged on the same plane, and The second TX electrode pattern and the plurality of second RX electrodes are disposed on the same plane.

3. The touch-sensing display device according to claim 1 , wherein: The first TX electrode pattern surrounds each of the plurality of first RX electrodes on the same plane, and there is a certain interval between the first TX electrode pattern and each of the plurality of first RX electrodes, and The second TX electrode pattern surrounds each of the plurality of second RX electrodes on the same plane with a certain interval between the second TX electrode pattern and each of the plurality of second RX electrodes.

4. The touch-sensing display device according to claim 1 , wherein: The first TX electrode pattern and each of the plurality of first RX electrodes are coupled to each other through mutual capacitance, and The second TX electrode pattern and each of the plurality of second RX electrodes are coupled to each other through mutual capacitance.

5. The touch-sensing display device according to claim 1, wherein: The plurality of first RX electrodes are set to k*i in the first touch block, where each of k and i is a natural number. The plurality of second RX electrodes are set to k*i in the second touch block, wherein each of k and i is a natural number, and The first RX electrode and the second RX electrode, both corresponding to the same row position and column position, are connected to the same RX sensing line.

6. The touch-sensing display device according to claim 5, wherein: The number of the RX sensing lines is the same as the number of the first RX electrodes or the number of the second RX electrodes.

7. The touch-sensing display device according to claim 1, wherein: The TX driving circuit drives the first TX driving line and the second TX driving line in a time-division manner.

8. The touch-sensing display device according to claim 7, wherein: The TX driving circuit provides a first touch block driving signal in a multi-pulse form to the first TX driving line during a first period, and provides a second touch block driving signal in a multi-pulse form to the second TX driving line during a second period after the first period.

9. The touch-sensing display device according to claim 8, wherein: The RX sensing circuit senses the charge amounts of the plurality of first RX electrodes that change in synchronization with the first touch block driving signal during the first period through the plurality of RX sensing lines, and senses the charge amounts of the plurality of second RX electrodes that change in synchronization with the second touch block driving signal during the second period through the plurality of RX sensing lines.

10. The touch-sensing display device according to claim 9, wherein: The RX sensing circuit includes: multiple preamplifier circuits; a channel multiplexer circuit configured to selectively connect input terminals of the plurality of preamplifier circuits to the plurality of RX sense lines; and A plurality of integrators are connected to output terminals of the plurality of preamplifier circuits.

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