Abstract: A fingerprint sensor in accordance with an exemplary embodiment includes a sensor plate including a plurality of cells, a driving signal generation unit disposed between an external voltage input terminal and the sensor plate to generate a driving signal, an active output voltage feedback unit disposed between one end of a variable capacitor and a voltage output terminal, and a shielding plate provided below the sensor plate and connected to an output terminal of the active output voltage feedback unit to block a noise generated from a circuit disposed below the sensor plate. Here, the fingerprint sensor further includes a driving signal control switch having one end connected to the driving signal generation unit and the other end connected to each of the plurality of cells of the sensor plate to set at least a portion of the plurality of cells of the sensor plate as a sensing cell and at least a portion of cells disposed around the set sensing cells as a driving cell.

Abstract: A fingerprint recognition device for capacitance detection according to an embodiment of the present invention includes: a fingerprint sensor cell array including a plurality of cells connected to a plurality of row lines and a plurality of column lines, a plurality of column line assemblies constituting a specific number of column lines of the fingerprint recognition cell arrays, a variable cycle clock generator operable to operate a pipeline process performed for each column line belonging to the column line set, and a multi-column line selector for selecting one column line among the column lines of the cell array. The variable cycle clock generator may sequentially control an integration operation for each column line belonging to the column line set at different times.

Abstract: A charge transfer circuit for capacitive sensing according to an embodiment of the present disclosure includes a variable capacitor defined through a sensor plate connected to one end of a drive line and one end of an X-drive line, an X-drive part disposed between a voltage input terminal and another end of the X-drive line opposing the variable capacitor, a switched capacitor integrator disposed between a voltage output terminal and another end of the drive line of which the one end is connected to the variable capacitor, and a shielding plate connected to a first input terminal of the switched capacitor integrator, wherein the first input terminal is connected to the other end of the drive line.

Abstract: A charge transfer circuit for capacitive sensing according to an embodiment of the present disclosure includes a variable capacitor defined through a sensor plate connected to one end of a drive line and one end of an X-drive line, an X-drive part disposed between a voltage input terminal and another end of the X-drive line opposing the variable capacitor, a switched capacitor integrator disposed between a voltage output terminal and another end of the drive line of which the one end is connected to the variable capacitor, and a shielding plate connected to a first input terminal of the switched capacitor integrator, wherein the first input terminal is connected to the other end of the drive line.

Abstract: A charge transfer circuit for capacitive sensing is disclosed. The charge transfer circuit for capacitive sensing includes a variable capacitor, an X-drive unit, and an active output voltage feedback (AVF) part. The variable capacitor is disposed between the output terminal of an X-drive line and the input terminal of a Y-drive line. The X-drive unit is connected between the input unit of the X-drive line and a voltage input terminal. The active output voltage feedback (AVF) part is connected between the output terminal of the Y-drive line and a voltage output terminal. The output terminal of the AVF part is connected to the output terminal of the Y-drive line.

Abstract: A charge transfer circuit for capacitive sensing is disclosed. The charge transfer circuit for capacitive sensing includes a variable capacitor, an X-drive unit, and an active output voltage feedback (AVF) part. The variable capacitor is disposed between the output terminal of an X-drive line and the input terminal of a Y-drive line. The X-drive unit is connected between the input unit of the X-drive line and a voltage input terminal. The active output voltage feedback (AVF) part is connected between the output terminal of the Y-drive line and a voltage output terminal. The output terminal of the AVF part is connected to the output terminal of the Y-drive line.

Abstract: A tolerance input/output circuit is provided for operating as the interface of a device to which a predetermined voltage or more cannot be applied to make it operate, depending on whether it is in an input mode or an output mode. The circuit includes an internal power supply, a Y gate signal generator, a kilpoly signal generator, a P gate signal generator and an output circuit. The Y gate signal generator receives an external pad signal of a high level, then generates a signal of an internal power supply level. The kilpoly signal generator generates the signal of the internal power supply level when the pad signal is at a low level, and generates the pad signal when the pad signal is at a high level. In an input mode, the P gate signal generator generates as a P gate signal the signal of the internal power supply level, when the pad signal is at a low level, and the pad signal, when the pad signal is of a high level.