Did You Know...
...When G.G. Hubbard learned of his future son-in-law's invention, he called it "only a toy." His daughter was engaged to a young man named Alexander Graham Bell.
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| Number | Title | Issue Date |
| 8183917 | RF power amplifier circuit with mismatch tolerance A radio frequency (RF) power amplifier system adjusts the supply voltage provided to a power amplifier (PA) adaptively, responsive to the measured or estimated power of the RF output signal of the PA. The RF PA system includes a power amplifier (PA) which receives a... | 05/22/2012 |
| 8179994 | Phase error de-glitching circuit and method of operating A system including a phase comparator to compare a first signal and a second signal to generate a phase error signal, and a controller to generate an adjusted phase error signal from the phase error signal in response to an amplitude of at least one of the first sig... | 05/15/2012 |
| 8095090 | RF power amplifier controller circuit A power amplifier controller circuit controls a power amplifier based upon an amplitude correction signal indicating the amplitude difference between the amplitude of the input signal and an attenuated amplitude of the output signal. The power amplifier controller c... | 01/10/2012 |
| 8050638 | Power amplifier controller with polar transmitter A power amplifier controller controls a power amplifier and is coupled to a polar modulator. The polar modulator generates an amplitude component and a phase-modulated component of the desired RF modulated signal, and outputs to the power amplifier controller. The p... | 11/01/2011 |
| 8032097 | Amplitude error de-glitching circuit and method of operating A power amplifier controller circuit controls a power amplifier based upon an amplitude correction signal indicating the amplitude difference between the amplitude of the input signal and an attenuated amplitude of the output signal. The power amplifier controller c... | 10/04/2011 |
| 8022761 | Error driven RF power amplifier control with increased efficiency A power amplifier controller for adjusting a supply voltage to a power amplifier. The power amplifier controller adjusts the supply voltage so that distortion in an RF output signal corresponds to a predetermined limit. An amplitude error signal is generated by the ... | 09/20/2011 |
| 8018277 | RF power amplifier system with impedance modulation A power amplifier controller circuit controls an adjustable impedance matching network at the output of a power amplifier to vary its load line to improve the efficiency of the RF PA. The PA controller circuit comprises an amplitude control loop that determines an a... | 09/13/2011 |
| 8014735 | RF power amplifier controlled by estimated distortion level of output signal of power amplifier A radio frequency (RF) power amplifier system is provided, in which a distortion of the RF output signal from the power amplifier is estimated by comparing the RF output signal with reference modulation information. The supply voltage to the power amplifier is adjus... | 09/06/2011 |
| 8013674 | Amplifier compression adjustment circuit An RF power amplifier system adjusts the supply voltage to the power amplifier based upon an amplitude correction signal indicating the amplitude difference between the amplitude of the RF input signal and an attenuated amplitude of the RF output signal of the power... | 09/06/2011 |
| 7933570 | Power amplifier controller circuit A power amplifier controller circuit controls a power amplifier based upon an amplitude correction signal indicating the amplitude difference between the amplitude of the input signal and an attenuated amplitude of the output signal. The power amplifier controller c... | 04/26/2011 |
| 7917106 | RF power amplifier controller circuit including calibrated phase control loop An RF power amplifier system comprises an amplitude control loop and a phase control loop. The amplitude control loop adjusts the supply voltage to the power amplifier based upon the amplitude correction signal indicating the amplitude difference between the amplitu... | 03/29/2011 |
| 7917105 | RF power amplifier controller circuit with compensation for output impedance mismatch A power amplifier controller circuit controls a power amplifier based upon an amplitude correction signal indicating the amplitude difference between the amplitude of the input signal and an attenuated amplitude of the output signal. The power amplifier controller c... | 03/29/2011 |
| 7876853 | Phase error de-glitching circuit and method of operating A system including a phase comparator to compare a first signal and a second signal to generate a phase error signal, and a controller to generate an adjusted phase error signal from the phase error signal in response to an amplitude of at least one of the first sig... | 01/25/2011 |
| 7869542 | Phase error de-glitching circuit and method of operating A system including a phase comparator to compare a first signal and a second signal to generate a phase error signal, and a controller to generate an adjusted phase error signal from the phase error signal in response to an amplitude of at least one of the first sig... | 01/11/2011 |
| 7783269 | Power amplifier controller with polar transmitter A power amplifier controller controls a power amplifier and is coupled to a polar modulator. The polar modulator generates an amplitude component and a phase-modulated component of the desired RF modulated signal, and outputs to the power amplifier controller. The p... | 08/24/2010 |
| 7782134 | RF power amplifier system with impedance modulation A power amplifier controller circuit controls an adjustable impedance matching network at the output of a power amplifier to vary its load line to improve the efficiency of the RF PA. The PA controller circuit comprises an amplitude control loop that determines an a... | 08/24/2010 |
| 7777566 | Amplifier compression adjustment circuit An RF power amplifier system adjusts the supply voltage to the power amplifier based upon an amplitude correction signal indicating the amplitude difference between the amplitude of the RF input signal and an attenuated amplitude of the RF output signal of the power... | 08/17/2010 |
| 7761065 | RF power amplifier controller circuit with compensation for output impedance mismatch A power amplifier controller circuit controls a power amplifier based upon an amplitude correction signal indicating the amplitude difference between the amplitude of the input signal and an attenuated amplitude of the output signal. The power amplifier controller c... | 07/20/2010 |
| 7741903 | Distortion-driven power amplifier power supply controller A power amplifier controller measures the distortion of a power amplifier output. Based upon the distortion measured, the supply voltage to the PA is adjusted in a control loop. In one embodiment, distortion is measured by computing the ratio of the measured power i... | 06/22/2010 |
| 7683694 | Low noise logarithmic detector A logarithmic detector circuit including a drive circuit to receive a modulated input signal and generate a buffered modulated signal, a signal shaping circuit coupled to the drive circuit and configured to shape a voltage range of the buffered modulated signal to g... | 03/23/2010 |
| 7466195 | Error driven RF power amplifier control with increased efficiency A power amplifier controller for adjusting a supply voltage to a power amplifier. The power amplifier controller adjusts the supply voltage so that distortion in an RF output signal corresponds to a predetermined limit. An amplitude error signal is generated by the ... | 12/16/2008 |
| 7454238 | Power combining power supply system A power supply system comprises a low-speed power supply and a high-speed power supply configured to operate in first and second frequency ranges, respectively, and generate first and second outputs, respectively. The lower end of the second frequency range is at le... | 11/18/2008 |
