Issued Patent List

US Patents issued (as sole or contributing inventor):

4,603,305 Apparatus and Method for Sweep Oscillator Calibration
4,746,880 Number Controlled Modulated Oscillator
5,053,982 Variable Modulus Digital Synthesizer
5,247,469 Digital Frequency Synthesizer and Method Using Vernier Interpolation
5,306,971 Binary Controlled Digital Tapped Delay Line
5,321,799 Signaling Transition Control in a Modulated Signal Communication System
5,491,458 Apparatus for Spreading The Spectrum Of A Signal And Method Therefor
5,646,955 Apparatus for Measuring Cycle To Cycle Jitter Of A Digital Signal And Method Therefor
5,651,035 Apparatus for Reducing Jitter of A Spectrum Spread Clock Signal and Method Therefor
5,675,292 Phaselock Loop Enabling Smooth Loop Bandwidth Switching Over A Wide Range
5,731,773 Half-Order Hold for Direct Digital Frequency Synthesis
5,952,895 Direct Digital Synthesis of Precise, Stable Angle Modulated Signal
6,112,071 Quadrature-Free RF Receiver for Directly Receiving Angle Modulated Signal
6,198,347 Driving Circuits for Switch Mode RF Power Amplifiers
6,215,355 Constant Impedance for Switchable Amplifier with Power Control
6,323,731 Variable Bias Control for Switch Mode RF Amplifier
6,366,177 High Efficiency Power Modulators
6,377,784 High Efficiency Modulation RF Amplifier
6,567,491 High Efficiency Line Driver for high crest-factor signals such as DMT/ADSL signals
6,587,018 Notch Filter and Method
6,636,112 High Efficiency Modulating Amplifier
6,690,215 Sigma-Delta-Based Frequency Synthesis
6,724,830 High efficiency line driver for high crest-factor signals such as DMT/ADSL signals
6,751,265 Method and system of amplitude modulation using dual/split channel unequal amplification
6,781,452 Power supply processing for power amplifiers
6,816,016 High-efficiency modulating RF amplifier
6,850,736 Method and apparatus for reception quality indication in wireless communication
6,864,668 High-efficiency amplifier output level and burst control
6,924,695 Power supply processing for power amplifiers
6,969,984 Direct phase and frequency demodulation
7,035,604 Communications signal amplifiers having independent power control and amplitude modulation
7,038,536 Power Supply Processing for Power Amplifiers
7,010,276 Communications signal amplifiers having independent power control and amplitude modulation
7,012,984 PLL noise smoothing using dual-modulus interleaving
7,026,797 Extremely high-speed switchmode DC-DC converters
7,035,604 Communications signal amplifiers having independent power control and amplitude modulation
7,038,536 Power supply processing for power amplifiers
7,099,635 High-efficiency modulating RF amplifier
7,116,728 Quadrature alignment in communications receivers using dual delay lines
7,227,342 Extremely high-speed switchmode DC-DC converters
7,280.813 Variable Delay Radio Receiver
7,395,038 High-Efficiency modulating RF Amplifier
7,424,083 PLL Noise Smoothing using Dual-Modulus Interleaving
7,444,125 Communications signal amplifiers having independent power control and amplitude modulation
7,468,601 Direct Phase and Frequency Demodulation
7,515,885 Communications signal amplifiers having independent power control and amplitude modulation
7,518,461 Method of configuring a polar-based modulator using a parameter look-up table
7,558,334 Enhanced hybrid class-S modulator
7,627,057 Quadrature alignment in communications receivers
7,636,386 Method of continuously calibrating the gain for a multi-path angle modulator
7,642,847 Power supply processing for power amplifiers
7,702,300 Envelope modulator saturation detection using a DC-DC converter
7,755,443 Delay-based modulation of RF communications signals
7,859,459 Phased Array receivers and methods employing phase shifting downconverters
7,906,944 Extremely high-speed switchmode DC-DC converters
7,929,644 instant-acquisition clock and data recovery systems and methods for serial communications links
7,983,643 Frequency demodulation with threshold extension
8,064,855 Transmission Power Controller
8,126,409 Adaptive Delay in Polar Transmitters
8,145,147 Power amplifier edge evaluation-alternative envelope modulator
8,301,088 Polar Modulation Transmitter with Envelope Modulator Path Switch
8,331,882 VSWR normalizing envelope modulator
8,364,099 Methods and apparatus for controlling leakage and power dissipation in radio frequency power amplifiers
8,395,402 Frequency Extension Methods and Apparatus for low-frequency electronic instrumentation
8,405,465 Duty cycle translator methods and apparatus
8,446,099 Power Conversion and control systems and methods for solid-state lighting
8,508,309 Wideband Phase Modulation Methods and Apparatus
8,604,800 Frequency Extension Methods and Apparatus for low-frequency electronic instrumentation
8,750,421 Communications Transmitter having High-efficiency Combination Modulator
8,760,078 Power Conversion and control systems and methods for solid-state lighting
8,811,533 Communications Transmitter having High-efficiency Combination Modulator
8,899,921 Wind Turbine having flow-aligned blades
8,928,424 Duty cycle translator methods and apparatus
8,929,484 Communications Transmitter having High-efficiency Combination Modulator
8,981,655 Power conversion and control systems and methods for solid-state lighting
9,024,534 Power conversion and control systems and methods for solid-state lighting
9,041,602 Phased Array Transmission Methods and Apparatus
9,130,806   Wideband phase modulation methods and apparatus
9,178,734   Communications transmitter having high-efficiency combination modulator
9,179,508   Solid-state lighting dimming
9,263,967   AC/DC power conversion methods and apparatus
9,265,105   Power conversion and control systems and methods for solid-state lighting
9,397,621   Limiting driver for switch-mode power amplifier
9,397,713   Polar Modulation using product mode
9,420,647   Dimming and voltage protection method and apparatus for solid state lighting
9,444,501   Polar Modulation using Product Mode
9,456,481   High-efficiency, wide dynamic range dimming for solid state lighting
9,520,781   Rapid-transition DC-DC Converter