Patent application number | Description | Published |
20100220868 | COUPLING OF SPEAKERS WITH INTEGRATED CIRCUIT - Systems and methods for a low pin architecture to couple speakers with integrated circuits are disclosed herein. In an implementation, the low pin architecture facilitates in reducing the required pin interfaces to couple a low power speaker, a high power speaker, and earphone speakers with integrated circuits (ICs). For this, the high power speaker can be cross-coupled between the pin interfaces that are coupled to the low power speaker and the earphone speakers. These pin interfaces are driven by corresponding driver circuits. In said implementation, some of the driver circuits can be shared to drive multiple pin interfaces. These shared driver circuits include a combined cascode circuit having a first cascode circuit integrated with a second cascode circuit to reliably and selectively drive one or more of the pin interfaces. | 09-02-2010 |
20100220875 | POP-UP NOISE SUPPRESSION IN AUDIO - Systems and methods for suppressing pop-up noise in an audio signal are disclosed. The system includes a driver circuit shared by a pin interface and a complementary pin interface. A control unit is coupled to the pin interface and the complementary pin interface. To activate the pin interface, the control unit is configured to first activate the driver output at the complementary pin interface. Once the complementary pin interface achieves a preset voltage, the driver output is switched to the pin interface by the control unit. In addition, the driver circuit can be calibrated for a DC offset on the complementary pin interface by re-using calibration data calculated at the pin interface. Further, DC correction signals can be provided from a pre-biasing circuit based on the calibration data of the driver circuit. | 09-02-2010 |
20120080945 | Power Management Unit Systems and Methods - Systems and methods provide for a power management unit and its operation. The power management unit includes: a step-down power converter configured to receive a first voltage and output a second voltage, wherein the second voltage is less than the first voltage and at least one step-up power converter configured to receive the second voltage and output a third voltage, wherein the third voltage is greater than the second voltage. It also includes an inductive element connected to the step-down power converter and the at least one step-up power converter and configured to store energy and selectively release the stored energy, wherein the inductive element is time shared by both the step-down power converter and the at least one step-up power converter; and a finite state machine configured to control the time sharing of the inductive element. | 04-05-2012 |
20120249202 | Pulse Width Modulation for Switching Amplifier - A device and a method for implementing pulse width modulation for switching amplifiers ( | 10-04-2012 |
20120306502 | Circuit for Controlling Current to Light-Emitting Diode (LED) - The present invention discloses a current controlling circuit wherein the circuit ( | 12-06-2012 |
20140139046 | Method and Electrical Interface Circuit Enabling Multiplexing - An electrical interface circuit is disclosed. The circuit comprises a microphone circuit ( | 05-22-2014 |
20140334632 | POP-UP NOISE SUPPRESSION IN AUDIO - Systems and methods for suppressing pop-up noise in an audio signal are disclosed. The system includes a driver circuit shared by a pin interface and a complementary pin interface. A control unit is coupled to the pin interface and the complementary pin interface. To activate the pin interface, the control unit is configured to first activate the driver output at the complementary pin interface. Once the complementary pin interface achieves a preset voltage, the driver output is switched to the pin interface by the control unit. In addition, the driver circuit can be calibrated for a DC offset on the complementary pin interface by re-using calibration data calculated at the pin interface. Further, DC correction signals can be provided from a pre-biasing circuit based on the calibration data of the driver circuit. | 11-13-2014 |
20150045095 | POWER AMPLIFIER PROVIDING HIGH EFFICIENCY - A power amplifier containing a DC-DC converter, a linear amplifier and a control block. The DC-DC converter receives power from a power source and generates a regulated power supply voltage whose magnitude is controlled by the magnitude of a control signal provided to the DC-DC converter. The linear amplifier receives an input signal and generates a power-amplified output signal, and receives the regulated power supply voltage for operation. The control block is coupled to receive the input signal, and generates the control signal with a magnitude based on the amplitude of the input signal. The regulated power supply voltage is modulated based on the amplitude of the input signal, for peak-to-peak amplitudes of the power-amplified output greater than or less than or equal to the magnitude of the power source. High efficiency for the power amplifier is thereby obtained. | 02-12-2015 |
20150070090 | SUSPEND MODE IN CHARGE PUMP - A device may be associated with a power source. The device may include a charge pump configured to output a pulse-width modulated voltage based upon an input voltage from the power source, with the pulse-width modulated voltage varying between a first voltage and a second voltage. The device may also include a low-pass filter comprising an output capacitor, with the output capacitor being configured to average the pulsed-width modulated voltage and to output a filtered voltage having a value different than that of the input voltage. The device may further include a controller configured to selectively decouple the charge pump from the power source when a load imposed on the low-pass filter is below a threshold load. | 03-12-2015 |