A voltage regulator can include: an input port with two terminals, and being configured to receive an input voltage; an output port with two terminals, and being configured to generate an output voltage, where the input port and the output port have a common ground potential; a group of input switches coupled in series between the two terminals of the input port, where a common node of every two adjacent input switches that form an input half-bridge topology is taken as an input switch node; at least one output half-bridge topology coupled between two terminals of the output port, where a common node of a high-side output switch and a low-side output switch in each output half-bridge topology is taken as an output switch node; and N storage capacitors, where each of the storage capacitors is coupled between one input switch node and one output switch node.

A voltage regulator can include: an input port with two terminals, and being configured to receive an input voltage; an output port with two terminals, and being configured to generate an output voltage, where the input port and the output port have a common ground potential; a group of input switches coupled in series between the two terminals of the input port, where a common node of every two adjacent input switches that form an input half-bridge topology is taken as an input switch node; at least one output half-bridge topology coupled between two terminals of the output port, where a common node of a high-side output switch and a low-side output switch in each output half-bridge topology is taken as an output switch node; and N storage capacitors, where each of the storage capacitors is coupled between one input switch node and one output switch node.

The present invention provides a touch panel and a controlling method thereof. The controlling method comprises: during a display period of the touch panel, turning on a bias voltage generation circuit to generate a bias voltage signal, turning on a reverse bias voltage generation circuit to generate a reverse bias voltage signal, and turning off a modulating voltage generation circuit; during a touch period of the touch panel, turning off the bias voltage generation circuit, the reverse bias voltage generation circuit and turning on the modulating voltage generation circuit to generate a modulating voltage signal, wherein the modulating voltage signal is same as a touch sensing signal of the touch panel; using a first capacitor to couple the modulating voltage signal to the bias voltage generation circuit; and using a second capacitor to couple the modulating voltage signal to the reverse bias voltage generation circuit.

A voltage detector (200) for monitoring an input signal and outputting a detection signal at an output when a voltage of the input signal meets a first threshold having: an input configured for receiving the input signal; a voltage reference circuit for receiving an input voltage and producing a reference voltage having a maximum value independent of the input voltage; and a trigger configured to compare the input signal and the reference voltage and to output a detection signal to the output when the voltage of the input signal reaches the first threshold. The voltage reference circuit comprises a reset input connected to either the input or the output and is configured to reduce the reference voltage when a predetermined reset signal is received. The voltage reference circuit may include: an input for receiving the input voltage; a first current controlling element (210), such as a diode, which allows current to flow as an increasing, non-linear function of voltage at least within a first range of voltages; a second current controlling element (240), such as a transistor, which allows current to flow as an increasing, non-linear function of voltage at least with a second range of voltages; and an output at which the output reference voltage is produced. The first current controlling element and the second current controlling element are connected in series between the input and a common reference, with the second current controlling element between the first current controlling element and a common reference, the output comprises a node between the two current controlling elements, the first and second range of voltages overlap and the second current controlling element is configured to vary the function by which it allows current to flow in dependence on the input voltage.

A voltage detector (200) for monitoring an input signal and outputting a detection signal at an output when a voltage of the input signal meets a first threshold having: an input configured for receiving the input signal; a voltage reference circuit for receiving an input voltage and producing a reference voltage having a maximum value independent of the input voltage; and a trigger configured to compare the input signal and the reference voltage and to output a detection signal to the output when the voltage of the input signal reaches the first threshold. The voltage reference circuit comprises a reset input connected to either the input or the output and is configured to reduce the reference voltage when a predetermined reset signal is received. The voltage reference circuit may include: an input for receiving the input voltage; a first current controlling element (210), such as a diode, which allows current to flow as an increasing, non-linear function of voltage at least within a first range of voltages; a second current controlling element (240), such as a transistor, which allows current to flow as an increasing, non-linear function of voltage at least with a second range of voltages; and an output at which the output reference voltage is produced. The first current controlling element and the second current controlling element are connected in series between the input and a common reference, with the second current controlling element between the first current controlling element and a common reference, the output comprises a node between the two current controlling elements, the first and second range of voltages overlap and the second current controlling element is configured to vary the function by which it allows current to flow in dependence on the input voltage.

An electronic circuit includes first to third transistors. The first transistor has a first channel width and a first channel length and generates a first potential difference by passing an operating current based on a first operating voltage. The second transistor has a second channel width and a second channel length and generates a second potential difference based on the operating current. The third transistor generates a third potential difference based on a second operating voltage and the operating current. A sum of a level of the first operating voltage and a level of the first potential difference corresponds to a sum of a level of the second operating voltage, a level of the second potential difference, and a level of the third potential difference. The first channel width is greater than the second channel width, or the first channel length is longer than the second channel length.

A voltage detector comprising: a first voltage reference generator for generating a first voltage reference signal; a second voltage reference generator for generating a second voltage reference signal, wherein the second voltage reference signal is higher than the first voltage reference signal; a trigger, powered by an input signal to the voltage detector, and having an input for receiving either the first or second voltage reference signal and an output for generating a detection signal; and a switch for selectively, connecting the input of the trigger to the first or second voltage reference signal, wherein the switch is operative to connect the input of the trigger to the first voltage reference signal when the detection signal output by the voltage detector is low and is operative to connect the input of the trigger to the second voltage reference signal when the detection signal output by the voltage detector is high, and a voltage detector system for monitoring an input signal and outputting a detection signal when a voltage of the input signal meets a first threshold, the voltage detector system comprising: a first voltage detector having an input for receiving the input signal and an output for outputting a detection signal, wherein the first voltage detector is configured to output the detection signal when the voltage of the input signal meets a first rising input voltage threshold; a second voltage detector having an input for receiving the input signal and an output for outputting a detection signal, wherein the second voltage detector is configured to output the detection signal when the voltage of the input signal meets a second rising input voltage threshold which is higher than the first threshold, wherein the output of the second voltage detector controls a connection between the input signal and the input of the first voltage detector such that when the voltage the input signal meets the second rising input voltage threshold the connection between the input and the input of the first voltage detector is inhibited or disconnected.

A voltage detector comprising: a first voltage reference generator for generating a first voltage reference signal; a second voltage reference generator for generating a second voltage reference signal, wherein the second voltage reference signal is higher than the first voltage reference signal; a trigger, powered by an input signal to the voltage detector, and having an input for receiving either the first or second voltage reference signal and an output for generating a detection signal; and a switch for selectively, connecting the input of the trigger to the first or second voltage reference signal, wherein the switch is operative to connect the input of the trigger to the first voltage reference signal when the detection signal output by the voltage detector is low and is operative to connect the input of the trigger to the second voltage reference signal when the detection signal output by the voltage detector is high, and a voltage detector system for monitoring an input signal and outputting a detection signal when a voltage of the input signal meets a first threshold, the voltage detector system comprising: a first voltage detector having an input for receiving the input signal and an output for outputting a detection signal, wherein the first voltage detector is configured to output the detection signal when the voltage of the input signal meets a first rising input voltage threshold; a second voltage detector having an input for receiving the input signal and an output for outputting a detection signal, wherein the second voltage detector is configured to output the detection signal when the voltage of the input signal meets a second rising input voltage threshold which is higher than the first threshold, wherein the output of the second voltage detector controls a connection between the input signal and the input of the first voltage detector such that when the voltage the input signal meets the second rising input voltage threshold the connection between the input and the input of the first voltage detector is inhibited or disconnected.

Power management systems are described. In an embodiment, a power management system includes a voltage source, a circuit load located within a chip, and a switched capacitor voltage regulator (SCVR) coupled to voltage source and the circuit load to receive an input voltage from the voltage source and supply an output voltage to the circuit load. The SCVR may include circuitry located within the chip and a discrete integrated passive device (IPD) connected to the chip.

Power management systems are described. In an embodiment, a power management system includes a voltage source, a circuit load located within a chip, and a switched capacitor voltage regulator (SCVR) coupled to voltage source and the circuit load to receive an input voltage from the voltage source and supply an output voltage to the circuit load. The SCVR may include circuitry located within the chip and a discrete integrated passive device (IPD) connected to the chip.