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Class Information
Number: 455/169.2
Name: Telecommunications > Receiver or analog modulated signal frequency converter > Signal selection based on frequency (e.g., tuning) > Frequency scanning > With particular variable voltage or current tuning > With varactor diode
Description: Subject matter wherein the particular variable voltage or current tuning means includes a two-terminal semiconductor device capacitance varies with the applied voltage.
Patents under this class:
| Patent Number |
Title Of Patent |
Date Issued |
| 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 |
| 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 |
| 4580285 |
Scanning AM radio with discriminator-driven-scan-stop-circuit |
Apr. 1, 1986 |
| 4466126 |
Tuner apparatus |
Aug. 14, 1984 |
| 4264976 |
Tuning control apparatus for digital tuner |
Apr. 28, 1981 |
| 4253195 |
FM-Receiver comprising a search tuning system |
Feb. 24, 1981 |
| 4053838 |
Radio receiver |
Oct. 11, 1977 |
| 4041399 |
Semiconductor varactor device and electronic tuner using same |
Aug. 9, 1977 |
| 4011515 |
Tunable scanning radio receiver |
Mar. 8, 1977 |
| 4011514 |
Memory circuit for tuning of an electronically tuned receiver to a preselected station |
Mar. 8, 1977 |
| 4009438 |
Superheterodyne receiver with a digitally adjustable tuning arrangement |
Feb. 22, 1977 |
| 3996540 |
Indicating device for tuning apparatus |
Dec. 7, 1976 |
| 3987400 |
Multiband scanning radio receiver |
Oct. 19, 1976 |
| 3986154 |
Automatic tuning apparatus |
Oct. 12, 1976 |
| 3978411 |
Sweep output generator having a frequency modulated local oscillator for the station selector of a television receiver |
Aug. 31, 1976 |
| 3967057 |
Automatic tuning apparatus |
Jun. 29, 1976 |
| 3965336 |
Radio or television receiver with an automatic station finding arrangement |
Jun. 22, 1976 |
| 3961267 |
Channel selecting control system for television tuner including unused channel skip system |
Jun. 1, 1976 |
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