Class 334/1 - COMBINED DIVERSE-TYPE TUNERS

Subclass of Class 334 - Tuners
Definition: Subject matter wherein the tuning unit consists of two or
No. of patents: 23
Last issue date: 12/14/2010

Number	Title	Issue Date
7852177	Double-tuning circuit of television tuner In a double-tuning circuit including a primary tuning circuit having a first inductor and a first variable capacitive element connected in parallel and a secondary tuning circuit having a second inductor and a second variable capacitive element connected in parallel...	12/14/2010
7283795	Receiver device having improved selectivity characteristics In a UHF band operation, a Bu terminal supplies a power supply voltage, and a (BL+BH) terminal does not supply the power supply voltage. Thereby, switching diodes are turned on, and a switching diode is turned off. In the UHF band operation, only a UHF signal in a s...	10/16/2007
7196738	Tuner integrated circuit and television tuner using the same circuit One embodiment of a tuner integrated circuit includes two mixer circuits, an IF amplifier circuit, three oscillation circuits, a PLL circuit, and a reference oscillation circuit. A plurality of terminals are provided at two sides of the tuner integrated circuit and ...	03/27/2007
7149483	Amplifying diversity signals using power amplifiers A method for amplifying diversity transmit signals includes receiving a transmit signal at a vector modulator, where the vector modulator processes the transmit signal to yield diversity transmit signals, amplifying each of the diversity transmit signals according t...	12/12/2006
7088202	Methods and apparatus for an improved discrete LC filter A discrete inductive-capacitive (LC) filter selects between at least two inductor banks to tune the LC filter. The filter receives an input signal that includes one or more bands of frequencies. A control signal selects a band of frequencies for processing. A first ...	08/08/2006
6940365	Methods and apparatus for an improved discrete LC filter A discrete inductive-capacitive (LC) filter selects between at least two inductor banks to tune the LC filter. The filter receives an input signal that includes one or more bands of frequencies. A control signal selects a band of frequencies for processing. A first ...	09/06/2005
6593835	Multiple-tuning circuit of tuner preventing selection characteristic deterioration In a secondary tuning circuit, a capacitor is provided between a connection point between a direct-current blocking capacitor and a tuning coil and a connection point between a varactor diode and another direct-current blocking capacitor. The capacitor, a...	07/15/2003
6594477	Electronic tuner A double conversion-type electronic tuner includes a first IF signal amplifying circuit having a field-effect transistor that amplifies an intermediate frequency signal at a predetermined gain, and input the resultant signal to a down-converter via a band...	07/15/2003
6486757	Double-tuned circuit of tuner featuring restrained degradation of selectivity A double-tuned circuit of a tuner that can be switched for tuning to a plurality of frequency bands by turning a switching diode ON or OFF restrains degradation of a selectivity caused by an undesirable additional tuning circuit or parasitic tuning circui...	11/26/2002
6456174	Tuning circuit A tuning circuit enables its Q to be always maintained with the condition of high grade even when tuning frequency of the tuning circuit is changed. The tuning circuit is constituted in such a way that a negative resistance circuit is connected to the tun...	09/24/2002
6125269	TV FM receiver for multimedia applications A receiver for receiving both first-type reception signals, for example TV signals, and second-type reception signals, for example, FM-radio signals. The receiver may be used in multimedia applications. In the receiver, a reception signal is fed via an in...	09/26/2000
5511012	Apparatus comprising a circuit having an input/output response controllable by a control signal, and approximation method The relationship between the input and output of a signal transfer circuit, such as a tune circuit, a filter, a phase shifter, an amplifier, etc., is determined by the circuit response to the input signal. The value of the circuit response (R) is controll...	04/23/1996
5214399	Circuit configuration for range changing in tuners A circuit configuration, especially in a television set, for range switching in tuners having at least two ranges includes at least two preselector stages each being assigned a respective tuner range. Each of the preselector stages is connected between a ...	05/25/1993
5204645	Circuit configuration for range switching in tuners A circuit configuration for range switching in tuners having at least two ranges includes at least two preselector stages each being assigned to a respective tuner range. Each of the preselector stages is connected between a supply potential terminal and ...	04/20/1993
4607391	VHF/UHF band switching tuner including a second diode in band switch loop A band switching circuit for a tuner for receiving VHF and UHF channels comprises a tuning circuit including a switching diode having an anode and a cathode for band switching, a plurality of resistors connected to the anode and cathode of the switching d...	08/19/1986
4590612	Electronic tuner having selectable band sections appropriately biased to mixer/amplifier An electronic tuner which includes an SHF band section in addition to ordinary UHF and VHF band sections for use in CATV, for example, has a diode and a resistor both connected between the VHF band section and a VHF band mixer stage. A transistor containe...	05/20/1986
4577171	Input circuit comprising at least two input paths An input circuit comprises at least two input paths which are connected to a common input terminal and which are alternately connectable to a common output. The input paths form selection members for the UHF and VHF frequency range whose signals are ampli...	03/18/1986
4291290	UHF-VHF tuner having damping means to reduce interference in UHF band An electronic tuner capable of selectively receiving the UHF band and high and low channels in the VHF band is described which has a suitable resistance provided across power supply terminals in order to improve the separation between the VHF mode and the...	09/22/1981
4207549	VHF Television tuner circuit with supression of undesired signals A VHF television tuner circuit is adapted for selecting a channel from a plurality of VHF television channels and a UHF/VHF converted television channel, by mechanical selection to form a resonant circuit having electrical characteristics corresponding to...	06/10/1980
4200850	Combination VHF and UHF tuner arrangement A combination VHF and UHF tuner is provided in which a common station selector shaft may be rotated a number of revolutions to cover the seventy stations in the UHF band. The common selector shaft is provided with twenty-four detent positions per revoluti...	04/29/1980
4150347	Dual band pushbutton electronic tuning system A tuning device comprises a preset mechanism capable of producing a tuning voltage to be applied to an electronic tuning circuit by moving any push button....	04/17/1979
4128820	Combination VHF and UHF tuner arrangement In a VHF tuner a stator bar switching arrangement is provided which is particularly suitable for use in combination VHF-UHF tuners. A movable switching member positioned on the main stator bar of a turret type VHF tuner is moved between fixed contacts on ...	12/05/1978
4118679	VHF, UHF and superband tuner with automatic switching A combination VHF, UHF and superband tuner, the superband and UHF tuners cooperating with the Channel 1 section of the VHF tuner, is provided with a connection network including voltage sensitive switching devices, such as voltage sensitive diodes, so tha...	10/03/1978

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Class 334/1 - COMBINED DIVERSE-TYPE TUNERS