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Class Information
Number: 455/255
Name: Telecommunications > Receiver or analog modulated signal frequency converter > Local control of receiver operation > Local oscillator frequency control
Description: Subject matter including one or more local oscillators combined with means to adjust the generated frequency thereof or with a control circuit or loop for controlling the oscillator frequency adjusting means in response to deviation of the generated oscillator frequency from a desired frequency or range of frequencies in such direction and amount as to restore the oscillator frequency to the desired frequency or range of frequencies.
Sub-classes under this class:
Patents under this class:
| Patent Number |
Title Of Patent |
Date Issued |
| 7616935 |
Method and apparatus for matching receiver carrier frequency |
Nov. 10, 2009 |
| 7613175 |
Method and system for inserting user defined comfort signal |
Nov. 3, 2009 |
| 7606545 |
Portable radio terminal and AFC control method |
Oct. 20, 2009 |
| 7603095 |
Apparatus and method of switching intervals |
Oct. 13, 2009 |
| 7587189 |
Determination and processing for fractional-N programming values |
Sep. 8, 2009 |
| 7586382 |
Methods and systems for temperature related frequency drift compensation |
Sep. 8, 2009 |
| 7587190 |
Systems and methods for low power clock generation |
Sep. 8, 2009 |
| 7583948 |
Time constant automatic adjusting circuit, filter circuit system, and method of automatically adjusting time constant |
Sep. 1, 2009 |
| 7577215 |
Angle demodulation apparatus, local oscillation apparatus, angle demodulation method, local oscillation signal generating method, recording medium and computer data signal |
Aug. 18, 2009 |
| 7574185 |
Method and apparatus for generating a phase-locked output signal |
Aug. 11, 2009 |
| 7567786 |
High-dynamic-range ultra wide band transceiver |
Jul. 28, 2009 |
| 7565112 |
Reduced adjacent channel interference in a radio receiver |
Jul. 21, 2009 |
| 7565129 |
Super-regenerative receiver |
Jul. 21, 2009 |
| 7551906 |
AM/FM radio receiver and local oscillator circuit used therein |
Jun. 23, 2009 |
| 7551911 |
Communication device with a self-calibration sleep timer |
Jun. 23, 2009 |
| 7542445 |
Method and system for maintaining autonomous system clock accuracy for a mobile radio terminal |
Jun. 2, 2009 |
| 7542731 |
Radio frequency transceiver |
Jun. 2, 2009 |
| 7526250 |
Apparatus, system and method for flip modulation in an impulse radio communications system |
Apr. 28, 2009 |
| 7522893 |
Radio receiver and radio transmitter |
Apr. 21, 2009 |
| 7522898 |
High frequency synthesizer circuits and methods |
Apr. 21, 2009 |
| 7519333 |
Radio architecture for use with frequency division duplexed systems |
Apr. 14, 2009 |
| 7516046 |
Network diagnostic system with programmable oscillator |
Apr. 7, 2009 |
| 7515887 |
Radio-controlled timepiece |
Apr. 7, 2009 |
| 7509108 |
Method and apparatus for automatic frequency correction with a frequency error signal generated by block correlation of baseband samples with a known code sequence |
Mar. 24, 2009 |
| 7496331 |
Oscillation device and oscillation method |
Feb. 24, 2009 |
| 7489916 |
Direct down-conversion mixer architecture |
Feb. 10, 2009 |
| 7480495 |
CATV tuner and one-chip IC used therein |
Jan. 20, 2009 |
| 7471936 |
GPS receiver in mobile communications devices |
Dec. 30, 2008 |
| 7463875 |
Wireless device minimizing use of external bandpass filter between low-noise amplifier and first mixer |
Dec. 9, 2008 |
| 7460850 |
High frequency receiving circuit provided with controller for turning on and off power supply to local oscillator |
Dec. 2, 2008 |
| 7457600 |
VCO device |
Nov. 25, 2008 |
| 7457599 |
Frequency transceiver for controlling intermediate frequency |
Nov. 25, 2008 |
| 7447483 |
Radio apparatus and a method for reducing interference in a radio apparatus |
Nov. 4, 2008 |
| 7436903 |
Multicarrier transmitter and method for transmitting multiple data streams with cyclic delay diversity |
Oct. 14, 2008 |
| 7437134 |
Tuner arrangement |
Oct. 14, 2008 |
| 7433395 |
Reliable multicarrier communication in the presence of timing phase error |
Oct. 7, 2008 |
| 7426377 |
Sigma delta (.SIGMA..DELTA.) transmitter circuits and transceiver using the same |
Sep. 16, 2008 |
| 7421252 |
Center frequency control of an integrated phase rotator band-pass filter using VCO coarse trim bits |
Sep. 2, 2008 |
| 7398074 |
Integrated transceiver circuit with low interference production and sensitivity |
Jul. 8, 2008 |
| 7398073 |
Low noise mixer |
Jul. 8, 2008 |
| 7395074 |
Position detection with frequency smoothing |
Jul. 1, 2008 |
| 7386064 |
Communication semiconductor integrated circuit device and a wireless communication system |
Jun. 10, 2008 |
| 7386286 |
High frequency low noise phase-frequency detector and phase noise reduction method and apparatus |
Jun. 10, 2008 |
| 7383033 |
Differential and quadrature harmonic VCO and methods therefor |
Jun. 3, 2008 |
| 7383025 |
Method for processing RF signals for receiving and transmission |
Jun. 3, 2008 |
| 7379722 |
Frequency allocation using a single VCO |
May. 27, 2008 |
| 7369829 |
Signal reception apparatus and method for multi-band ultra-wideband communication systems |
May. 6, 2008 |
| 7356312 |
Fractional frequency synthesizer |
Apr. 8, 2008 |
| 7343144 |
Frequency synthesizer using PLL architecture for wireless frequency allocation |
Mar. 11, 2008 |
| 7333789 |
Wide-band modulation PLL, timing error correction system of wide-band modulation PLL, modulation timing error correction method and method for adjusting radio communication apparatus having wi |
Feb. 19, 2008 |
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