Dirk Leipold

Digital phase locked loop

Fine-grained gear-shifting of a digital phase-locked loop (PLL)

Radio frequency built-in self test for quality monitoring of local oscillator and transmitter

Digital amplitude modulation

All-digital frequency synthesis with DCO gain calculation

Sampling mixer with asynchronous clock and signal domains

All-digital frequency synthesis with DCO gain calculation

Digital amplitude modulation

Predistortion Calibration In A Transceiver Assembly

Buried layer and method

Direct Radio Frequency (RF) Sampling With Recursive Filtering Method

Predistortion calibration in a transceiver assembly

Direct radio frequency (RF) sampling with recursive filtering method

System and method for amplifier gain measurement and compensation

All-digital frequency synthesis with non-linear differential term for handling frequency perturbations

Transmit filter

RF A/D converter with phased feedback to low noise amplifier

Time-to-digital converter with non-inverting buffers, transmission gates and non-linearity corrector, SOC including such converter and method of phase detection for use in synthesizing a clock signal

System and method for increasing radio frequency (RF) microwave inductor-capacitor (LC) oscillator frequency tuning range

Methods and apparatus to provide an auxiliary receive path to support transmitter functions

Spread spectrum demodulation using a subsampling communication receiver architecture

On-chip receiver sensitivity test mechanism

On-chip receiver sensitivity test mechanism

System and method for implementing transformer on package substrate

Method of defining semiconductor fabrication process utilizing transistor inverter delay period

Removing close-in interferers through a feedback loop

Offset balancer, method of balancing an offset and a wireless receiver employing the balancer and the method

Digital, down-converted RF residual leakage signal mitigating RF residual leakage

Gain calibration of a digital controlled oscillator

Type-II all-digital phase-locked loop (PLL)

Type-II all-digital phase-locked loop (PLL)

Technique for improving antialiasing and adjacent channel interference filtering using cascaded passive IIR filter stages combined with direct sampling and mixing

Removing close-in interferers through a feedback loop

Sigma-delta (ΣΔ) analog-to-digital converter (ADC) structure incorporating a direct sampling mixer

On-chip test mechanism for transceiver power amplifier and oscillator frequency

Efficient charge transfer using a switched capacitor resistor

Subsampling communication receiver architecture with gain control and RSSI generation

Gain calibration of a digital controlled oscillator

Low noise high isolation transmit buffer gain control mechanism

Method and apparatus for digital amplitude and phase modulation

Efficient pulse amplitude modulation transmit modulation

Subsampling communication receiver architecture with relaxed IFA readout timing

Multi-tap, digital-pulse-driven mixer

Image reject filtering in a direct sampling mixer

Multi-band low noise amplifier system

Wireless communications device having type-II all-digital phase-locked loop (PLL)

Method and apparatus for crystal drift compensation

Apparatus for and method of noise suppression and dithering to improve resolution quality in a digital RF processor

System and method for increasing radio frequency (RF)/microwave inductor-capacitor (LC) oscillator frequency tuning range

Efficient pulse amplitude modulation transmit modulation

Sampling mixer with asynchronous clock and signal domains

Technique for improving antialiasing and adjacent channel interference filtering using cascaded passive IIR filter stages combined with direct sampling and mixing

Methods and apparatus to control frequency offsets in digitally controlled crystal oscillators

Integrated circuit incorporating RF antenna switch and power amplifier