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Class Information
Number: 455/195.1
Name: Telecommunications > Receiver or analog modulated signal frequency converter > Signal selection based on frequency (e.g., tuning) > Variable voltage or current tuning
Description: Subject matter wherein the means to select the carrier wave frequency is responsive to voltage or current.










Patents under this class:
1 2 3 4

Patent Number Title Of Patent Date Issued
8675078 Test technique for set-top boxes Mar. 18, 2014
8494468 Mobile wireless communications device including sensing transistor and hysteretic comparator and related methods Jul. 23, 2013
8351886 Voltage regulator with a bandwidth variation reduction network Jan. 8, 2013
8260213 Method and apparatus to adjust a tunable reactive element Sep. 4, 2012
8175560 Method and system for tuning an antenna May. 8, 2012
8175559 Receiving apparatus May. 8, 2012
8068798 Full closed loop auto antenna tuning for wireless communications Nov. 29, 2011
8000738 Mobile terminal with leakage current prevention Aug. 16, 2011
7865157 Controllable mixer Jan. 4, 2011
7848721 Antenna damping circuit and high frequency receiver employing same Dec. 7, 2010
7821362 Boosted-bias tunable filter with dynamic calibration Oct. 26, 2010
7787840 Shape memory alloy receiver Aug. 31, 2010
7756495 High speed receiver Jul. 13, 2010
7668526 Frequency mixer using current feedback amplifiers Feb. 23, 2010
7660566 System for creating a programmable tuning voltage Feb. 9, 2010
7561861 Tuning circuit Jul. 14, 2009
7558552 Integrated circuit and method of generating a bias current for a plurality of data transceivers Jul. 7, 2009
7501919 Boosted-bias tunable filter with dynamic calibration Mar. 10, 2009
7427907 Boosted-bias tunable filter with dynamic calibration Sep. 23, 2008
7349034 Television tuner using integrated circuit Mar. 25, 2008
7295822 Radio wave receiver, radio-controlled timepiece and tuning capacitance setting method Nov. 13, 2007
7266388 Transmitting circuit and communication terminal unit therewith Sep. 4, 2007
7171178 Tuning circuit having amplitude-varying function Jan. 30, 2007
7146199 Cordless digital audio headphone Dec. 5, 2006
7142818 Systems and methods for reducing radio receiver interference from an on-board avionics transmitter Nov. 28, 2006
7031683 Apparatus and methods for calibrating signal-processing circuitry Apr. 18, 2006
7019790 Integrated tuner circuit and television tuner using an integrated tuner circuit Mar. 28, 2006
6920316 High performance integrated circuit regulator with substrate transient suppression Jul. 19, 2005
6714771 Broadcast radio signal seek circuit Mar. 30, 2004
6624743 Automatic adjusting responder with no self-contained power supply Sep. 23, 2003
6615031 Heterodyne stage for high-frequency receivers Sep. 2, 2003
6553216 RF tunable filter arrangement with tunable image trap Apr. 22, 2003
6424824 Apparatus for setting the tuning voltage of tunable resonant circuits Jul. 23, 2002
6400935 Pilot tone detector Jun. 4, 2002
6188970 Method of calibrating a multistage selective amplifier Feb. 13, 2001
5953642 System for contactless power and data transmission Sep. 14, 1999
5845200 Method and an apparatus for automatically tuning a receiver Dec. 1, 1998
5808531 Voltage-controlled variable tuning circuit Sep. 15, 1998
5745844 Receiver control in a communication device by antenna de-tuning in strong signal conditions, and method therefor Apr. 28, 1998
5742898 Tuning system with DC-DC converter Apr. 21, 1998
5483688 Adaptive automatic antenna tuning method and apparatus Jan. 9, 1996
5469117 Voltage-controlled frequency oscillator Nov. 21, 1995
5408688 Method and a device pertaining to an electro-mechanically controlled resonance module Apr. 18, 1995
5189593 Integrated distributed resistive-capacitive network Feb. 23, 1993
5136719 Automatic antenna tubing method and apparatus Aug. 4, 1992
5040239 Tuning circuit and receiver Aug. 13, 1991
5020146 Lossy constant bandwidth tuned circuit May. 28, 1991
4996599 Television tuner oscillator with three point tracking Feb. 26, 1991
4984296 Tuned radio apparatus Jan. 8, 1991
4921465 Varactor tuned UHF RF signal input circuit May. 1, 1990

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