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Class Information
Number: 455/227
Name: Telecommunications > Receiver or analog modulated signal frequency converter > Responsive to an input signal of particular predetermined frequency
Description: Subject matter wherein the receiver is permanently adjusted in such a manner as to have a response to signals having a carrier wave of a predetermined frequency or a carrier signal having a predetermined identifying modulation frequency superimposed thereon.
Sub-classes under this class:
Patents under this class:
| Patent Number |
Title Of Patent |
Date Issued |
| 7603093 |
System and method to monitor broadband radio frequency transport systems |
Oct. 13, 2009 |
| 7570946 |
Method for determining the signal strength at the input of a tuner |
Aug. 4, 2009 |
| 7483683 |
Harmonic rejection gated-switching mixer |
Jan. 27, 2009 |
| 7412219 |
High-frequency amplifier having simple circuit structure and television tuner using high-frequency amplifier |
Aug. 12, 2008 |
| 7398104 |
Mobile phone with wireless camera detection |
Jul. 8, 2008 |
| 7395037 |
Control system for controlling an output signal power level of a wireless transmitter |
Jul. 1, 2008 |
| 7376207 |
Apparatus for receiving and recovering frequency shift keyed symbols |
May. 20, 2008 |
| 7356311 |
Wireless audio signal and control signal device and method thereof |
Apr. 8, 2008 |
| 7299025 |
Harmonic rejection gated-switching mixer |
Nov. 20, 2007 |
| 7263330 |
Validation of the presence of an electromagnetic transponder in the field of a phase demodulation reader |
Aug. 28, 2007 |
| 7231194 |
Localization of narrowband signals |
Jun. 12, 2007 |
| 7224751 |
Device and method for checking whether a signal with a predetermined frequency is being received |
May. 29, 2007 |
| 7224980 |
Radio system |
May. 29, 2007 |
| 7221918 |
Digital DC-offset correction circuit for an RF receiver |
May. 22, 2007 |
| 7203472 |
Method and apparatus providing calibration technique for RF performance tuning |
Apr. 10, 2007 |
| 7184716 |
Low cost/low power analog transceiver architecture |
Feb. 27, 2007 |
| 7181184 |
Band edge amplitude reduction system and method |
Feb. 20, 2007 |
| 7177606 |
Control system for controlling an output signal power level of a wireless transmitter |
Feb. 13, 2007 |
| 7107008 |
Validation of the presence of an electromagnetic transponder in the field of a phase demodulation reader |
Sep. 12, 2006 |
| 7088951 |
Receiver, method thereof, program thereof, recording medium recording the program, and communication system |
Aug. 8, 2006 |
| 7072629 |
Method for recording information transmitted over a radio frequency |
Jul. 4, 2006 |
| 7069042 |
Quadrature direct synthesis discrete time multi-tone generator |
Jun. 27, 2006 |
| 7062228 |
Cellular communications system using baseband carrier injection and related methods |
Jun. 13, 2006 |
| 7006807 |
Electronic broadcast radio skip protection |
Feb. 28, 2006 |
| 6993315 |
Super-regenerative microwave detector |
Jan. 31, 2006 |
| 6915146 |
Method and apparatus for receiving a plurality of different codes at a plurality of different frequencies |
Jul. 5, 2005 |
| 6842498 |
Global positioning system interference detection |
Jan. 11, 2005 |
| 6701131 |
International universal call progress analysis system |
Mar. 2, 2004 |
| 6665350 |
Method and system for improved analog signal detection |
Dec. 16, 2003 |
| 6640093 |
Broadcast receiver |
Oct. 28, 2003 |
| 6625446 |
Information processor, method of information processing and program storing medium |
Sep. 23, 2003 |
| 6512803 |
Global positioning system receiver capable of functioning in the presence of interference |
Jan. 28, 2003 |
| 6487240 |
Apparatus for receiving and recovering frequency shift keyed symbols |
Nov. 26, 2002 |
| 6415139 |
Detection circuit of tone signal |
Jul. 2, 2002 |
| 6373398 |
Automobile tuner system |
Apr. 16, 2002 |
| 6310554 |
Severe weather detection apparatus and method of detecting and warning of severe weather conditions |
Oct. 30, 2001 |
| 6308052 |
Half-duplex radios for indicating signal transmissions |
Oct. 23, 2001 |
| 6204761 |
Weather alert system |
Mar. 20, 2001 |
| 6175324 |
Police radar detector |
Jan. 16, 2001 |
| 6175325 |
Multi-band microwave detector |
Jan. 16, 2001 |
| 6169511 |
Radar detector |
Jan. 2, 2001 |
| 6137406 |
Double superheterodyne type microwave detector capable of detecting leaked microwaves |
Oct. 24, 2000 |
| 5939982 |
Apparatus for monitoring opening of sealed containers |
Aug. 17, 1999 |
| 5917441 |
Police radar detector for sweeping K and K.sub.A radar bands during one local oscillator sweep |
Jun. 29, 1999 |
| 5900832 |
Input stage for police radar detector including input signal preamplification |
May. 4, 1999 |
| 5893056 |
Methods and apparatus for generating noise signals from speech signals |
Apr. 6, 1999 |
| 5856803 |
Method and apparatus for detecting radio-frequency weapon use |
Jan. 5, 1999 |
| 5852417 |
Police radar detector including nuisance alert suppression |
Dec. 22, 1998 |
| 5848362 |
Portable alerting unit for alerting a user to call arrival to portable radio apparatus |
Dec. 8, 1998 |
| 5835052 |
Radar detector and the adjustment system and method thereof |
Nov. 10, 1998 |
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