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Class Information
Number: 455/120
Name: Telecommunications > Transmitter > Including tuning
Description: Subject matter including a resonant network or crystal whose resonant frequency may be varied (tuned) to control or modify the operating frequency of the transmitter, or which may be substituted for other resonant networks or crystals, as by switching, to control or modify the operating frequency of the transmitter.
Sub-classes under this class:
Patents under this class:
| Patent Number |
Title Of Patent |
Date Issued |
| 7330708 |
Tuning circuit with amplitude attenuation function and integrated circuit for radio communication apparatus |
Feb. 12, 2008 |
| 7236741 |
Methods and apparatus for tuning in an inductive system |
Jun. 26, 2007 |
| 7236802 |
Coupling device for interfacing power amplifier and antenna in differential mode |
Jun. 26, 2007 |
| 7184720 |
Method and device for simulating radio channel |
Feb. 27, 2007 |
| 7167686 |
Wireless communications transceiver: transmitter using a harmonic rejection mixer and an RF output offset phase-locked loop in a two-step up-conversion architecture and receiver using direct c |
Jan. 23, 2007 |
| 7142811 |
Wireless communication over a transducer device |
Nov. 28, 2006 |
| 7142830 |
Adaptive transceiver system |
Nov. 28, 2006 |
| 7127217 |
On-chip calibration signal generation for tunable filters for RF communications and associated methods |
Oct. 24, 2006 |
| 7099635 |
High-efficiency modulating RF amplifier |
Aug. 29, 2006 |
| 6985702 |
Transceiver with frequency multiplier tracked to frequency generator |
Jan. 10, 2006 |
| 6980776 |
Transceiver apparatus |
Dec. 27, 2005 |
| 6906684 |
Controlling a telescopic antenna mast |
Jun. 14, 2005 |
| 6898419 |
Remotely adjustable bandpass filter |
May. 24, 2005 |
| 6804540 |
Remote band-pass filter in a distributed antenna system |
Oct. 12, 2004 |
| 6766150 |
System and method for tuning a narrowband cavity filter used in a CDMA transmitter |
Jul. 20, 2004 |
| 6763227 |
Systems and methods for modulator calibration |
Jul. 13, 2004 |
| 6671501 |
Signal transmission circuit |
Dec. 30, 2003 |
| 6597925 |
Transmitter circuit with frequency self-optimization |
Jul. 22, 2003 |
| 6580900 |
Tuning arrangement |
Jun. 17, 2003 |
| 6295443 |
Automatic tuning AM transmitter |
Sep. 25, 2001 |
| 6212367 |
Mobile telephone apparatus with tunable filter tuned to the transmit band |
Apr. 3, 2001 |
| 6115584 |
Transmitter-receiver for use in broadband wireless access communications systems |
Sep. 5, 2000 |
| 6072993 |
Portable radio transceiver with diplexer-switch circuit for dual frequency band operation |
Jun. 6, 2000 |
| 6058294 |
Adjustable frequency stabilizing internal chip capacitor system |
May. 2, 2000 |
| 5991606 |
Apparatus for filtering signals of an antenna arrangement and a sender/receiver arrangement with two or more antennae |
Nov. 23, 1999 |
| 5689219 |
Summing network |
Nov. 18, 1997 |
| 5673003 |
Amplifier circuit having a variable bandwidth |
Sep. 30, 1997 |
| 5530921 |
Enhanced system and method for implementing a backup control channel in a cellular telecommunication network |
Jun. 25, 1996 |
| 5408495 |
Multiple cavity tuning of a transmitter output in a communication system |
Apr. 18, 1995 |
| 5345200 |
Coupling network |
Sep. 6, 1994 |
| 5276921 |
Transmitter with nonlinearity correction circuit |
Jan. 4, 1994 |
| 4977610 |
Wireless communication apparatus and method of operating same |
Dec. 11, 1990 |
| 4817193 |
AM transmitter having single tuning means for oscllator, carrier isolator and antenna |
Mar. 28, 1989 |
| 4679003 |
Frequency divider circuit and frequency synthesizer using the same |
Jul. 7, 1987 |
| 4612668 |
FM wireless transmitter |
Sep. 16, 1986 |
| 4502025 |
High speed PIN diode switched antenna coupler and method |
Feb. 26, 1985 |
| 4291284 |
Antenna coupler |
Sep. 22, 1981 |
| 4234965 |
Communication tuning system utilizing local oscillator frequency selection for maximum RF filter bandwidth and method thereof |
Nov. 18, 1980 |
| 4213152 |
Output circuit for video tape recorder |
Jul. 15, 1980 |
| 4131850 |
Single side band radio apparatus |
Dec. 26, 1978 |
| 4128808 |
Channel frequency analyser |
Dec. 5, 1978 |
| 4052673 |
Combined controlled oscillator and frequency multiplier |
Oct. 4, 1977 |
| 4052682 |
Multiple oscillator modulator circuit |
Oct. 4, 1977 |
| 4048561 |
Apparatus for preventing simultaneous transmission and channel selection in a transmitter or transceiver |
Sep. 13, 1977 |
| 4039982 |
Coaxial cavity radio frequency tuning circuit having a toroidal-shaped electrode to effect tuning |
Aug. 2, 1977 |
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