Abstract: A method for driving a load includes driving a load to an initial voltage within a voltage window, the voltage window based on an input voltage and an offset voltage, and driving the load to approximately the input voltage.

Abstract: A first analog block includes a first plurality of switched capacitors and a second analog block includes a second plurality of switched capacitors. A switch associated with the first plurality of switched capacitors as well as a switch associated with the second plurality of switched capacitors may be configured based on one or more analog functions. The configuring of the first analog and the second analog block may include the configuring of the switch associated with the first plurality of switched capacitors when the analog function is associated with a first single ended signal and the configuring of both the switch associated with the first plurality of switched capacitors and the switch associated with the second plurality of switched capacitors when the analog function is associated with a differential signal.

Abstract: Methods and apparatus include and amplifier circuit and a first capacitor branch including a first plurality of capacitors. The first capacitor branch couples to an input signal and to an input of the amplifier circuit. A second capacitor branch includes a second plurality of capacitors. The second capacitor branch couples to the input of the amplifier circuit and to an output of the amplifier circuit.

Abstract: A first analog block includes a first plurality of switched capacitors and a second analog block includes a second plurality of switched capacitors. A switch associated with the first plurality of switched capacitors as well as a switch associated with the second plurality of switched capacitors may be configured based on one or more analog functions. The configuring of the first analog and the second analog block may include the configuring of the switch associated with the first plurality of switched capacitors when the analog function is associated with a first single ended signal and the configuring of both the switch associated with the first plurality of switched capacitors and the switch associated with the second plurality of switched capacitors when the analog function is associated with a differential signal.

Abstract: A method for driving a load includes driving a load to an initial voltage within a voltage window, the voltage window based on an input voltage and an offset voltage, and driving the load to approximately the input voltage.

Abstract: A fingerprint sensing circuit, system, and method is disclosed. The fingerprint sensor maybe include a plurality of inputs coupled to a plurality of fingerprint sensing electrodes and to an analog front end. The analog front end may be configured to generate at least one digital value in response to a capacitance of at least one of the plurality of fingerprint sensing electrodes. Additionally, the analog front end may include a quadrature demodulation circuit to generate at least one demodulated value for processing by a channel engine. The channel engine may generate a capacitance result value that is based, in part, on the demodulated value and is stored in a memory.

Abstract: A first portion of a programmable switched capacitor block includes a first plurality of switched capacitors and a second portion of the programmable switched capacitor block includes a second plurality of switched capacitors. A first switch associated with the first plurality of switched capacitors as well as a second switch associated with the second plurality of switched capacitors may be configured based on a type of analog function that is to be provided. The configuring of the first analog and the second analog block may include the configuring of the first switch associated with the first plurality of switched capacitors when the analog function operates on a first single ended signal and the configuring of both the first and second switches when the analog function operates on a differential signal.

Abstract: Methods and apparatus include and amplifier circuit and a first capacitor branch including a first plurality of capacitors. The first capacitor branch couples to an input signal and to an input of the amplifier circuit. A second capacitor branch includes a second plurality of capacitors. The second capacitor branch couples to the input of the amplifier circuit and to an output of the amplifier circuit.

Abstract: A device, system, and method of a programmable circuit configured to operate in a buffered drive mode and blanking mode is disclosed. The programmable circuit includes a continuous-time digital-to-analog converter (CTDAC), a continuous-time block (CTB), coupled to the CTDAC, and a sample and hold (SH) circuit coupled to the CTDAC and the CTB. The programmable circuit is configured to operate in a buffered drive mode to buffer an output signal from the CTDAC. The programmable circuit, in buffered drive mode, is further configured to operate in a blanking mode to cause the SH circuit to perform a blanking operation on the CTDAC output signal.

Abstract: A fingerprint sensing circuit, system, and method is disclosed. The fingerprint sensor maybe include a plurality of inputs coupled to a plurality of fingerprint sensing electrodes and to an analog front end. The analog front end may be configured to generate at least one digital value in response to a capacitance of at least one of the plurality of fingerprint sensing electrodes. Additionally, the analog front end may include a quadrature demodulation circuit to generate at least one demodulated value for processing by a channel engine. The channel engine may generate a capacitance result value that is based, in part, on the demodulated value and is stored in a memory.

Abstract: A fingerprint sensing circuit, system, and method is disclosed. The fingerprint sensor maybe include a plurality of inputs coupled to a plurality of fingerprint sensing electrodes and to an analog front end. The analog front end may be configured to generate at least one digital value in response to a capacitance of at least one of the plurality of fingerprint sensing electrodes. Additionally, the analog front end may include a quadrature demodulation circuit to generate at least one demodulated value for processing by a channel engine. The channel engine may generate a capacitance result value that is based, in part, on the demodulated value and is stored in a memory.

Abstract: A fingerprint sensing circuit, system, and method is disclosed. The fingerprint sensor maybe include a plurality of inputs coupled to a plurality of fingerprint sensing electrodes and to an analog front end. The analog front end may be configured to generate at least one digital value in response to a capacitance of at least one of the plurality of fingerprint sensing electrodes. Additionally, the analog front end may include a quadrature demodulation circuit to generate at least one demodulated value for processing by a channel engine. The channel engine may generate a capacitance result value that is based, in part, on the demodulated value and is stored in a memory.

Abstract: A user interface with fingerprint recognition and secure access to sensitive information and applications is described. Fingerprint recognition may occur on a dedicated module or integrated into a touchscreen. The user interface may be configured to display icons representative of secure applications and gate access thereto via biometric authentication or the user interface may be configured to display icons representative of secure applications only upon detection of valid biometric data.

Abstract: A fingerprint sensing circuit, system, and method is disclosed. The fingerprint sensor maybe include a plurality of inputs coupled to a plurality of fingerprint sensing electrodes and to an analog front end. The analog front end may be configured to generate at least one digital value in response to a capacitance of at least one of the plurality of fingerprint sensing electrodes. Additionally, the analog front end may include a quadrature demodulation circuit to generate at least one demodulated value for processing by a channel engine. The channel engine may generate a capacitance result value that is based, in part, on the demodulated value and is stored in a memory.

Abstract: Embodiments of the invention relate to a method and apparatus to reduce power consumption in a passive matrix LCD driver circuit by using a plurality of drive buffers and active power management of sub-blocks in the passive matrix LCD drive circuit. Each drive buffer may operate in a first phase, which may include a high-drive mode to drive an LCD voltage to a threshold voltage level and a low-drive mode to modify the LCD voltage to approximate an input voltage of the drive buffer, and to maintain a constant LCD voltage level. The low-drive buffer consumes less current than the high-drive buffer, thus reducing power consumption. The drive buffer may also operate in a second phase, also a no-drive mode, in which the drive buffer and the bias voltage generator may be completely turned off, to further reduce power consumption. The drive buffer may be used to drive capacitive loads, as well as partially-resistive loads and inductive loads.

Abstract: A fingerprint sensing circuit, system, and method is disclosed. The fingerprint sensor maybe include a plurality of inputs coupled to a plurality of fingerprint sensing electrodes and to an analog front end. The analog front end may be configured to generate at least one digital value in response to a capacitance of at least one of the plurality of fingerprint sensing electrodes. Additionally, the analog front end may include a quadrature demodulation circuit to generate at least one demodulated value for processing by a channel engine. The channel engine may generate a capacitance result value that is based, in part, on the demodulated value and is stored in a memory.

Abstract: A first portion of a programmable switched capacitor block includes a first plurality of switched capacitors and a second portion of the programmable switched capacitor block includes a second plurality of switched capacitors. A first switch associated with the first plurality of switched capacitors as well as a second switch associated with the second plurality of switched capacitors may be configured based on a type of analog function that is to be provided.

Abstract: An active integrator for sensing capacitance of a touch sense array is disclosed. The active integrator is configured to receive from the touch sense array a response signal having a positive portion and a negative portion. The response signal is representative of a presence or an absence of a conductive object on the touch sense array. The active integrator is configured to continuously integrate the response signal.

Abstract: A method for driving a load includes driving a load to an initial voltage within a voltage window, the voltage window based on an input voltage and an offset voltage, and driving the load to approximately the input voltage.

Abstract: A first analog block includes a first plurality of switched capacitors and a second analog block includes a second plurality of switched capacitors. A switch associated with the first plurality of switched capacitors as well as a switch associated with the second plurality of switched capacitors may be configured based on one or more analog functions.