Daniel L Kaczman

7230505, Jun 12, 2007

Apr 4, 2005

11/098110

Mohammed Rachedine - Mundelein IL, US
Daniel L. Kaczman - Gurnee IL, US

Freescale Semiconductor, Inc. - Austin TX

H03B 5/00
H03L 7/099

331179, 331 25, 331177 R, 331185

A VCO circuit including a VCO, a voltage supply and a control circuit. The VCO has a supply voltage input and a gain that changes with its supply voltage. The voltage supply has an adjust input and an output coupled to the supply voltage input of the VCO. The voltage supply adjusts the voltage level of its output in response to changes of the adjust input. The control circuit has a first adjust output coupled to the adjust input of the voltage supply to adjust the gain of the VCO. The VCO may include a frequency range adjust input controlled by the control circuit so that the gain of the VCO is adjusted when the frequency range is changed. For a multi-band VCO, the gain is adjusted for different frequency bands to maintain a relatively constant gain for each frequency band.

7392026, Jun 24, 2008

Apr 4, 2005

11/098490

Mohammed S. Alam - Grayslake IL, US
Daniel L. Kaczman - Gurnee IL, US

Freescale Semiconductor, Inc. - Austin TX

H04B 1/06

4551801, 4551891, 455313

A multi-band high gain mixer and quadrature signal generator allows a receiver system to receive signals at multiple frequency bands without requiring significant hardware duplication. A single mixer directly receives any of three communication frequency bands such as Universal Mobile Telecommunication System (UMTS), Personal Communication Services (PCS), Digital Communication System (DCS), and Japan and US W-CDMA 800 bands without amplification. A Serial-Parallel Interface selectably forwards RF signals within the receiver's frequency channels to the mixer for demodulation into in-phase (I) and quadrature (Q) signals at a common IF output from the multi-mode receiver. Significant power and cost advantages are attained by elimination of duplicate mixers and amplifier stages.

8010074, Aug 30, 2011

Feb 8, 2008

12/028720

Daniel L. Kaczman - Newbury Park CA, US
Lawrence E. Connell - Naperville IL, US
Joseph P. Golat - Cary IL, US
Manish N. Shah - Arlington Heights IL, US

Freescale Semiconductor, Inc. - Austin TX

H04B 1/10
H04B 15/06
H04B 1/26

455313, 455296, 455317, 455326

A balanced mixer circuit ( and ) in a baseband receiver () includes an oscillator circuit (), a mixer ( and ), a digital-to-analog converter ( and ) and a digital signal processor (). The mixer includes CMOS devices ( and ). In response to differential outputs from the mixer, the digital signal processor controls the digital-to-analog converter to output bias voltages for the gate of at least one of the CMOS devices of the mixer to compensate for imbalance in the differential output of the mixer that may be caused by mismatch among two or more CMOS devices of the mixer or caused by other reasons, in order to increase second order intercept point of the mixer.

8073078, Dec 6, 2011

Feb 8, 2008

12/028623

Daniel L. Kaczman - Gurnee IL, US
Manish N. Shah - Vernon Hills IL, US

Freescale Semiconductor, Inc. - Austin TX

H03K 9/00

375316, 330250, 330288, 331132

A high performance radio frequency receiver includes an isolated transconductance amplifier with large binary and stepped gain control range, controlled impedance, and enhanced blocker immunity, for amplifying and converting a radio frequency signal to multiple electrically isolated currents; a pulse generator for generating in-phase and quadrature pulses; a crossover correction circuit and pulse shaper for controlling a crossover threshold of the pulses and interaction between in-phase and quadrature mixers; and a double balanced mixer for combining the RF signal with the pulses to generate an intermediate frequency or baseband zero intermediate frequency current-mode signal. The intermediate frequency signal and second order harmonics may be filtered with a high frequency low pass filter and a current injected complex direct-coupled filter. IIP2 calibration of the in-phase and quadrature channels may be optimized using the isolated transconductance amplifier.

8515372, Aug 20, 2013

Mar 24, 2008

12/079106

Daniel L. Kaczman - Gurnee IL, US
Manish N. Shah - Vernon Hills IL, US

Freescale Semiconductor, Inc. - Austin TX

H04B 17/00

4552264, 4552342, 455323, 455334, 375345

Methods and corresponding systems for receiving a radio frequency signal include a receiver capable of switching operating modes and operable to receive the radio frequency signal in any of the operating modes. A metric monitor is coupled to the receiver and operable to provide a metric. A controller is responsive to the metric and operable to switch the receiver between the operating modes. The operating modes can include a zero intermediate frequency (ZIF) mode and a very low intermediate frequency (VLIF) mode. The metric can include a received signal strength indicator (RSSI) and an adjacent channel indicator. The receiver can be configured to operate in the ZIF mode in response to the RSSI value satisfying a threshold and configured to operate in the VLIF mode in response to the RSSI value failing to satisfy the threshold.

8610503, Dec 17, 2013

Dec 16, 2011

13/328896

Daniel Lee Kaczman - Newbury Park CA, US
Haibo Cao - Pasadena CA, US
Russ Alan Reisner - Newbury Park CA, US
James Phillip Young - Thousand Oaks CA, US

Skyworks Solutions, Inc. - Woburn MA

H03F 3/68

330295, 330124 R

Apparatus and methods for oscillation suppression are disclosed. In one embodiment, a power amplifier system includes a plurality of power amplifiers for amplifying an input radio frequency (RF) signal to generate an output RF signal. The plurality of power amplifiers include a first power amplifier, a second power amplifier, and a third power amplifier, each of which are configured to be individually switchable between an enabled state and a disabled state so as to control a power amplification of the power amplifier system. A first capacitor is electrically connected between the outputs of the first and second power amplifiers, and a second capacitor is electrically connected between the outputs of the second and third power amplifiers. The first and second capacitors are configured to allow signals generated using the first, second, and third power amplifiers to combine constructively to generate the output RF signal.

8045943, Oct 25, 2011

Jan 29, 2008

12/021534

Daniel L. Kaczman - Gurnee IL, US
Mohammed S. Alam - Grayslake IL, US
David L. Cashen - Wauconda IL, US
Lu M. Han - Chicago IL, US
Mohammed Rachedine - Lincolnshire IL, US
Manish N. Shah - Vernon Hills IL, US

Freescale Semiconductor, Inc. - Austin TX

H04B 1/18
H04B 1/26

455293, 455318, 455326

A high performance radio frequency receiver includes a low noise amplifier with large binary and stepped gain control range, controlled impedance, and enhanced blocker immunity, for amplifying and converting a radio frequency signal to a current; a pulse generator for generating in-phase and quadrature pulses; a crossover correction circuit and pulse shaper for controlling a crossover threshold of the pulses and interaction between in-phase and quadrature mixers; and a double balanced mixer for combining the RF signal with the pulses to generate an intermediate frequency or baseband zero intermediate frequency current-mode signal. The in-phase and quadrature pulses have a duty cycle of 20-35%. The intermediate frequency signal and second order harmonics may be filtered with a high frequency low pass filter and a current injected complex direct-coupled filter. Decreased die size, current drain, cost, and complexity, as well as improvements in gain, 1/f noise, noise figure, sensitivity, and linearity may result.

20060182197, Aug 17, 2006

Feb 14, 2005

11/057743

Nihal Godambe - Palatine IL, US
Daniel Kaczman - Gurnee IL, US

H04L 25/49
H04B 1/707

375297000, 375146000

A transmitter is provided that corrects for both static and dynamic offsets to minimize carrier feedthrough. A feedback loop permits correction to be performed during normal operation of the transmitter, rather than during a calibration sequence in which the inputs are zeroed. The transmitter includes an adder that subtracts a correction signal from an input signal to produce a corrected signal. A filter filters the corrected signal and a modulator modulates the filtered signal to produce an RF signal. The feedback loop includes a mixer that converts the RF signal to baseband, an A/D converter that converts the baseband signal to a digital signal, which is provided to an FFT, a matched filter that filters the signal from the FFT, a Maximum Seeking Frequency Estimator that determines the maximum signal, and a gain that compensates for the feedback loop and produces the correction signal.