| Patent application number | Description | Published |
|---|
| 20090154544 | Amplifier Modulation Method and Apparatus - A signal is modulated by generating a pulse-width modulation signal and applying the pulse-width modulation signal to an input of a switched-mode amplifier. An output of the amplifier is coupled to a filter operable to impart either differential mode oscillations or common mode oscillations at the amplifier output based on the duty cycle of the pulse-width modulation signal. The duty cycle of the pulse-width modulation signal is varied to impart amplitude modulations at the amplifier output. | 06-18-2009 |
| 20090270056 | MODULATION SYSTEM AND METHOD FOR SWITCHED AMPLIFIERS - A power amplifier includes a baseband modulator configured to receive a baseband amplitude component and generate a baseband modulated pulse string, an oscillator configured to receive a baseband phase component and generate phase modulated complex carrier signals, a complex up-converter configured to receive and mix the baseband modulated pulse string with the phase modulated complex carrier signals into mixed product signals, and two or more switched mode power amplifiers coupled to the complex up-converter, configured to amplify and switch the mixed product signals at the carrier frequency. The power amplifier further comprises complex filters individually coupled to one of the switch mode power amplifiers, configured to suppress image components in the amplified and switched mixed product signals, and a power combiner coupled to the two or more complex filters, configured to combine the real component of the complex filtered and amplified mixed product signals to generate an RF transmission signal. | 10-29-2009 |
| 20100073102 | IQ-MODULATION SYSTEM AND METHOD FOR SWITCHED AMPLIFIERS - An apparatus and methods for a baseband modulator configured to code amplitude signals into pulse width modulated time signals comprising at least two amplitude levels is disclosed. A pulse width modulator can receive a component signal of a baseband complex signal and generate a discrete-time pulse width modulated signal. This signal can be converted to a continuous time signal, such as a pulse-width modulated time signal and can be shifted to a carrier signal corresponding respectively to the component signal by a switch. Bursts sequences are generated to an input of a switched amplifier for driving operation of the amplifier therein. | 03-25-2010 |
| 20100080319 | High Bandwidth Modulation and Transmission - This disclosure relates systems and methods for a high bandwidth modulation and transmission of communication signals. | 04-01-2010 |
| 20120256697 | System and Method for Generating a Pulse-width Modulated Signal - In an embodiment, a method of generating a pulse-width modulated signal from an input signal includes calculating a finite number of basis functions of a first pulse-width modulated signal based on the input signal, and forming an electronic output based on the calculated finite number of basis functions. | 10-11-2012 |
| 20120300879 | High Bandwidth Modulation and Transmission - This disclosure relates systems and methods for a high bandwidth modulation and transmission of communication signals. | 11-29-2012 |
| 20130070836 | System and Method for Generating a Radio Frequency Pulse-width Modulated Signal - In an embodiment, a method of producing a multi-level RF signal includes producing plurality of pulse-width modulated signals based on an input signal. The method further includes driving a corresponding plurality of parallel amplifiers with the plurality of pulse-width modulated signals by setting a parallel amplifier to have a first output impedance when a corresponding pulse-width modulated signal is in an active state and setting the parallel amplifier to have a second output impedance when the corresponding pulse-width is in an inactive state. The method also includes phase shifting the outputs of the plurality of parallel amplifiers, wherein phase shifting transforms the second output impedance into a third impedance that is higher than the second output impedance, and combining the phase shifted outputs. | 03-21-2013 |
| 20130235923 | Pulse-Width Modulator and Methods of Implementing and Using the Same - A pulse-width modulator (PWM) includes a plurality of comparators for comparing an input signal with a plurality of reference signals and for providing a plurality of corresponding comparison signals. The pulse-width modulator also includes a combinational logic for receiving the plurality of comparison signals and for generating a plurality of binary pulse-width modulation signals on the basis of the plurality of comparison signals. At most only a currently selected binary pulse-width modulation signal of the binary pulse-width modulation signals is at a first signal level at a time. The currently selected binary pulse-width modulation signal is associated to a specific reference signal of the plurality of reference signals which is currently closest to the input signal among the plurality of reference signals in terms of a given amplitude relation between the plurality of reference signals and the input signal. | 09-12-2013 |
| 20140002192 | System and Method for a Cascoded Amplifier | 01-02-2014 |
| 20140062604 | System and Method for a Power Amplifier - In accordance with an embodiment, a system includes a first amplifier and a first bandpass filter having an input coupled in series with an output of the first amplifier, and an output configured to be coupled to a load. The bandpass filter has a lower input impedance at an in-band center frequency than at out-of-band frequencies, and the first amplifier is configured to receive a pulse width modulated waveform filtered according to a first transfer function that attenuates sidebands of the pulse width modulated waveform. | 03-06-2014 |
| 20140132363 | System and Method for Generating a Pulse-width Modulated Signal - In an embodiment, a method of generating a pulse-width modulated signal from an input signal includes calculating a finite number of basis functions of a first pulse-width modulated signal based on the input signal, and forming an electronic output based on the calculated finite number of basis functions. | 05-15-2014 |
