Daniel A Babitch

6735181, May 11, 2004

Jun 26, 2000

09/603801

Daniel Babitch - Santa Clara CA

Atmel Corporation - San Jose CA

H04B 320

370290, 375219, 375376, 375375, 455 24

A wireless transceiver featuring a compensating filter circuit with a frequency and optionally an amplitude response which has the same function as the composite of filter effects from the transmit side as well as from the intermediate frequency (IF) stage of the receive side. The compensating filtering approximately duplicates the effects of the phase lock loop on the transmit side and the effects of IF filtering on the receive side, as well as amplitude distortion in the detector, which would delay or distort the audio. Then, the compensated audio is added or subtracted, depending on phase considerations, from the receive signal so that the receive signal is free of filter artifacts.

7466209, Dec 16, 2008

Jan 5, 2007

11/620643

Daniel Babitch - San Jose CA, US

SiRF Technology, Inc. - San Jose CA

H03B 5/04
H03B 5/36
H03L 1/02

331 66, 331158

A system and method for providing temperature compensation in a oscillator component (such as a crystal oscillator component) that includes a closely-located temperature sensing device. The crystal oscillator component in example systems and methods is exposed to a temperature profile during a calibration procedure. Temperature and frequency data are collected and applied to coefficient generating function according to a temperature compensation model to generate a set of coefficients that are used in the temperature compensation model in an application device. The generated coefficients are stored in a coefficient memory accessible to an application device during operation.

7642957, Jan 5, 2010

Nov 27, 2007

11/945269

Gary Lennen - Cupertino CA, US
Daniel Babitch - San Jose CA, US

SIRF Technology, Inc. - San Jose CA

G01S 1/02
G01C 21/00

34235706, 34235712, 701213

A GPS Mobile Unit is described. The GPS Mobile Unit may include at least two antennas, at least two GPS receivers, and a position solution module in signal communication with the at least two GPS receivers.

7664206, Feb 16, 2010

Jul 29, 2005

11/192864

Erik Anderson - San Francisco CA, US
Daniel Babitch - San Jose CA, US
Majid Hashemi - San Jose CA, US

SiRF Technology, Inc. - San Jose CA

H04L 27/06

375340

A radio frequency integrated circuit for a global positioning system (GPS) application mixes radio frequency GPS signals from an external source with a predetermined intermediate frequency that is less than 4f. In one embodiment, the intermediate frequency is selected to be 1. 5f. An intermediate frequency filter then band-limits the intermediate frequency GPS signals, rolling off at a frequency in the vicinity of 2. 5 MHz to achieve substantial attenuation at 3. 5-4. 0 MHz. An automatic gain control circuit amplifies the filtered intermediate frequency GPS signals to proper voltage levels. The amplified intermediate frequency GPS signals is then digitized by an analog-to-digital converter at a predetermined sampling rate more than twice the intermediate frequency to provide samples of a predetermined number of bits, which are then provided for base band processing by a general purpose microprocessor over an industry-standard serial bus.

7855608, Dec 21, 2010

Dec 9, 2008

12/331185

Daniel Babitch - San Jose CA, US

SiRF Technology - San Jose CA

H03B 5/04
H03B 5/36
H03L 1/02

331 66, 331 69, 331158

A system and method for providing temperature compensation in a oscillator component (such as a crystal oscillator component) that includes a closely-located temperature sensing device. The crystal oscillator component in example systems and methods is exposed to a temperature profile during a calibration procedure. Temperature and frequency data are collected and applied to coefficient generating function according to a temperature compensation model to generate a set of coefficients that are used in the temperature compensation model in an application device. The generated coefficients are stored in a coefficient memory accessible to an application device during operation.

7929928, Apr 19, 2011

Nov 24, 2004

10/997797

Daniel Babitch - San Jose CA, US
Steven A. Gronemeyer - Cedar Rapids IA, US
Lionel Garin - San Jose CA, US
Ashutosh Pande - San Jose CA, US
Leon Kuo-Liang Peng - Mountain View CA, US
Gengsheng Zhang - Cupertino CA, US
Nicolas Patrick Vantalon - Sunnyvale CA, US

SiRF Technology Inc. - San Jose CA

H04B 17/02

455139, 4551821, 4551921, 455255, 455 71, 4554561, 375226, 375326, 375327, 375344, 331 16, 331 18

A frequency phase correction system and method are described that provides a receiver with a greater ability to lock onto relatively weak radio frequency signals by determining and estimating an amount of frequency error in a local frequency reference of the receiver, and using the error estimate to maintain frequency coherence with a received signal, thereby allowing tracking over a longer period of time, enabling longer integration times to capture weaker signals without losing frequency coherence.

8073414, Dec 6, 2011

Dec 22, 2008

12/341551

Noshir Dubash - Chandler AZ, US
Jeffrey E. Koeller - Mesa AZ, US
Daniel Babitch - San Jose CA, US

SiRF Technology Inc. - San Jose CA

H04B 1/18

4551803, 331 16, 345204, 323316, 375295, 34235752

A Radio Frequency Receiver on a Single Integrated Circuit (“RFSIC”) is described. The RFSIC may include a mixer, a phase-locked loop (“PLL”) in signal communication with the mixer, and an on-chip auto-tuned RF filter in signal communication with both the mixer and PPL, such that the same PLL simultaneously tunes the frequency of the VCO and the frequency response of the auto-tuned RF filter.

8185083, May 22, 2012

Mar 30, 2009

12/414406

Daniel Babitch - San Jose CA, US
Steven A. Gronemeyer - Cedar Rapids IA, US
Peter Naji - Tempe AZ, US

CSR Technology Inc. - San Jose CA

H04B 1/16

4553431, 4553434

GPS navigation devices or GPS receivers can consume less power by using a temperature recorder circuit and/or a power manager in maintaining the accuracies of the GPS receiver time and reference frequency to improve battery life. A representative receiver includes a time reference device and the temperature recorder circuit that operate while the receiver hibernates. The time reference device generates clock signals and the temperature recorder circuit receives and operates using the clock signals from the time reference device. The temperature recorder senses the temperature of the time reference device. The temperature recorder circuit is designed to send a wake-up signal to at least one electrical component of the receiver to wake up the electrical component of the receiver. The electrical component of the receiver includes at least one of the following: a GPS signal processing system and a frequency reference device.