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Class Information
Number: 455/180.4
Name: Telecommunications > Receiver or analog modulated signal frequency converter > Signal selection based on frequency (e.g., tuning) > Channel or station selection > Combined with band selection > Uhf and vhf > Varactor tuned (e.g., varactor diode)
Description: Subject matter including a two-terminal semiconductor device capacitance for tuning the desired channel or station frequency.
Patents under this class:
| Patent Number |
Title Of Patent |
Date Issued |
| 7620379 |
Radio frequency tuner |
Nov. 17, 2009 |
| 7561865 |
System and method for determining a resonant frequency in a communications device |
Jul. 14, 2009 |
| 7546101 |
Variable attenuation of broadband differential signals using PIN diodes |
Jun. 9, 2009 |
| 7386065 |
Voltage controlled oscillator (VCO) suitable for use in frequency shift keying (FSK) system |
Jun. 10, 2008 |
| 7295251 |
Television tuner capable of improving image disturbance with receiving UHF band |
Nov. 13, 2007 |
| 7289780 |
Band switchable type tuning circuit of television signal |
Oct. 30, 2007 |
| 7283796 |
Electronic tuning system |
Oct. 16, 2007 |
| 7155182 |
Varactor with extended tuning range |
Dec. 26, 2006 |
| 7103320 |
Wireless communication system within a system on a chip |
Sep. 5, 2006 |
| 7095989 |
Frequency translating devices and frequency translating measurement systems with DC bias added to a mixer diode |
Aug. 22, 2006 |
| 6973288 |
Linearizer for a PIN diode attenuator |
Dec. 6, 2005 |
| 6970056 |
Filter assembly and communication apparatus |
Nov. 29, 2005 |
| 6957053 |
Method for selection of a receiver tuning frequency |
Oct. 18, 2005 |
| 6950152 |
Television tuner which has leveled a gain deviation in the same band |
Sep. 27, 2005 |
| 6906596 |
Oscillation circuit and a communication semiconductor integrated circuit |
Jun. 14, 2005 |
| 6904271 |
High-frequency-signal switching circuit suppressing high-frequency-signal distortion |
Jun. 7, 2005 |
| 6711390 |
Program related data in an FM RDS receiver |
Mar. 23, 2004 |
| 6583826 |
Intermediate frequency circuit in television tuner with large attenuation of audio if signal in adjacent channel |
Jun. 24, 2003 |
| 6466114 |
Resonator with variable resonance frequency |
Oct. 15, 2002 |
| 6226503 |
Double-tuned circuit |
May. 1, 2001 |
| 6160572 |
Tuner for cable modem |
Dec. 12, 2000 |
| 5978663 |
Antenna tuning circuit |
Nov. 2, 1999 |
| 5752179 |
Selective RF circuit with varactor tuned and switched bandpass filters |
May. 12, 1998 |
| 5715531 |
Synchronous tracking filter circuit for a broadcast satellite tuner |
Feb. 3, 1998 |
| 5715528 |
Converting capacitance to inductance in a floating resonant |
Feb. 3, 1998 |
| 5678212 |
Electronic tuning circuit for an AM receiver |
Oct. 14, 1997 |
| 5548829 |
PLL circuit having a low-pass passive filter coupled to a varactor diode |
Aug. 20, 1996 |
| 5524288 |
Tuning of a radio receiver |
Jun. 4, 1996 |
| 5438690 |
Tuner circuit substrate having a jack attachment plate electrically connected with an earth pattern |
Aug. 1, 1995 |
| 5428828 |
Television receiver tuning circuit |
Jun. 27, 1995 |
| 5285179 |
Double tuned circuit with balanced output and image trap |
Feb. 8, 1994 |
| 5179726 |
Automatic tuning method and apparatus of double conversion tuner |
Jan. 12, 1993 |
| 4792989 |
Tuner circuits and voltage generators therefor |
Dec. 20, 1988 |
| 4771332 |
Tuning apparatus for the VHF band of a television receiver |
Sep. 13, 1988 |
| 4710973 |
Varactor diode tuner with band switched coils and lines |
Dec. 1, 1987 |
| 4555808 |
Tuner apparatus |
Nov. 26, 1985 |
| 4424594 |
Extended range tunable resonant circuit for a VHF television receiver tuning system |
Jan. 3, 1984 |
| 4365348 |
Tuning voltage generating apparatus of voltage synthesizer type |
Dec. 21, 1982 |
| 4317227 |
Multi-mode automatic channel frequency synthesis system |
Feb. 23, 1982 |
| 4307467 |
Continuous tuning arrangement for a multiband television receiver |
Dec. 22, 1981 |
| 4271529 |
Tunable resonant circuits for a multi-band VHF/UHF/CATV tuner |
Jun. 2, 1981 |
| 4270218 |
Continuous tune all-channel selector |
May. 26, 1981 |
| 4249256 |
Continuous tuning arrangement for a multiband television receiver |
Feb. 3, 1981 |
| 4249132 |
Continuous tuning arrangement for a multiband television receiver |
Feb. 3, 1981 |
| 4189678 |
Combination VHF-UHF tuner for use in a television receiver |
Feb. 19, 1980 |
| 4160213 |
Mixer injection voltage compensation circuit |
Jul. 3, 1979 |
| 4128849 |
Selectively coupled synthesizer for tuner of TV receiver |
Dec. 5, 1978 |
| 4061982 |
Channel selection apparatus provided with memory for digitalizing and storing channel selection voltage |
Dec. 6, 1977 |
| 4041399 |
Semiconductor varactor device and electronic tuner using same |
Aug. 9, 1977 |
| 4031474 |
Solid state television channel selection system |
Jun. 21, 1977 |
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